Gravina Siding and Windows Company v. Paul A. Frederiksen ( 2022 )


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  •      The summaries of the Colorado Court of Appeals published opinions
    constitute no part of the opinion of the division but have been prepared by
    the division for the convenience of the reader. The summaries may not be
    cited or relied upon as they are not the official language of the division.
    Any discrepancy between the language in the summary and in the opinion
    should be resolved in favor of the language in the opinion.
    SUMMARY
    May 5, 2022
    2022COA50
    No. 20CA1465, Gravina v. Frederiksen — Contracts — Breach
    of Contract; Restitution — Unjust Enrichment
    A division of the court of appeals considers whether a party
    who breaches a contract may nonetheless recover on an unjust
    enrichment claim for any benefit bestowed on the other party to the
    contract. Based largely on the Restatement (Third) of Restitution
    and Unjust Enrichment and cases from other jurisdictions, the
    division concludes that an unjust enrichment claim permits an
    equitable remedy when the contract is silent regarding the
    consequences of the particular breach. The division’s opinion also
    addresses breach of contract, negligent supervision, exclusion of
    expert evidence, and attorney fees issues.
    COLORADO COURT OF APPEALS                                          2022COA50
    Court of Appeals No. 20CA1465
    Douglas County District Court No. 18CV31018
    Honorable Jeffrey K. Holmes, Judge
    Gravina Siding and Windows Company,
    Plaintiff-Appellee and Cross-Appellant,
    v.
    Larry A. Gravina, Mike Gravina, and Jason Castro,
    Third-Party Defendants-Appellees,
    and
    Paul A. Frederiksen and Brenda J. Frederiksen,
    Defendants-Appellants and Cross-Appellees.
    JUDGMENT AFFIRMED IN PART, REVERSED IN PART,
    AND CASE REMANDED WITH DIRECTIONS
    Division I
    Opinion by JUDGE DAILEY
    Fox and Schutz, JJ., concur
    Announced May 5, 2022
    Fischer & Fischer, P.C., Jennifer K. Fischer, Denver, Colorado, for Plaintiff-
    Appellee and Cross-Appellant
    Overturf McGath & Hull, P.C., Scott A. McGath, Steven W. Boatright, Denver,
    Colorado, for Third-Party Defendants-Appellees
    Frederiksen Law Office, Paul A. Frederiksen, Parker, Colorado, for Defendants-
    Appellants and Cross-Appellees
    ¶1    Defendants and third-party plaintiffs Paul A. Frederiksen and
    Brenda J. Frederiksen (the Frederiksens) appeal the trial court’s
    entry of judgment in favor of plaintiff Gravina Siding and Windows,
    Co., and third-party defendants Larry A. Gravina, Mike Gravina,
    and Jason Castro (collectively, Gravina). Gravina cross-appeals
    from an unfavorable part of the trial court’s judgment. We affirm in
    part, reverse in part, and remand with directions.
    I.   Background
    ¶2    For some years, the Frederiksens had to repair their cedar
    siding because woodpeckers damaged it by building nests and
    boring holes into it. On November 29, 2017, the Frederiksens
    entered into a contract with Gravina to replace the cedar siding of
    their home with steel siding in exchange for payments totaling
    $42,116.00. The Frederiksens put down $10,000 towards the
    contract price.
    ¶3    Gravina (1) told the Frederiksens that it could start work
    within ten to fourteen weeks of signing the contract and (2)
    estimated that the job would take up to four weeks to complete.
    The Frederiksens hoped to have the new siding put on the house
    before the woodpeckers arrived in the spring.
    1
    ¶4    Gravina’s subcontractors began work in late March 2018 and
    were not finished four-and-a-half months later when, on August 7,
    2018, the Frederiksens received a bill from Gravina requesting final
    payment for the outstanding balance on the contract. Believing
    Gravina had repeatedly breached their agreement, the Frederiksens’
    terminated the contract and denied Gravina and its subcontractors
    further access to their property.
    ¶5    Gravina filed the present action against the Frederiksens,
    alleging, as pertinent here, breach of contract, breach of the
    covenant of good faith and fair dealing, and unjust enrichment.
    The Frederiksens filed an answer as well as counterclaims against
    Gravina and third-party claims against Gravina’s owner (Larry
    Gravina) and two employees (salesperson Mike Gravina and project
    supervisor Jason Castro). On Gravina’s motion, the trial court
    dismissed all but, as pertinent here, the Frederiksens’ (1) breach of
    contract claim against Gravina and (2) negligent supervision claim
    against the three individual third-party defendants.
    ¶6    After conducting a three-day bench trial, the court found that
    Gravina had materially breached the contract and, that,
    consequently, the Frederiksens had properly terminated it.
    2
    Nonetheless, the trial court ultimately (1) awarded Gravina a net
    judgment of $19,000 on its unjust enrichment claim1 and (2)
    rejected the Frederiksens’ negligent supervision claim and request
    for attorney fees.
    ¶7     Both parties appeal.
    ¶8     On appeal, the Frederiksens contend that the trial court erred
    by (1) ruling that they had been unjustly enriched as a result of
    Gravina’s efforts; (2) failing to award them damages for Gravina’s
    breach of contract; (3) rejecting their negligent supervision claim
    against the individual third-party defendants; (4) excluding expert
    testimony related to the existence of roof damage and related repair
    costs; and (5) denying their request for attorney fees.
    ¶9     Gravina cross-appeals the trial court’s ruling that it breached
    the contract, entitling the Frederiksens to terminate the contract
    and recover damages.
    ¶ 10   We address each contention, but we start with the issue raised
    in Gravina’s cross-appeal before later addressing the parties’
    respective recoveries.
    1Because the Frederiksens had already paid Gravina a $10,000
    deposit, the court’s award required paying an additional $9,000.
    3
    II.   Gravina’s Cross-Appeal
    ¶ 11   Gravina contends that the trial court erred when it found that
    it materially breached the contract, allowing the Frederiksens to
    terminate the contract and recover damages. We disagree.
    ¶ 12   Upon a material breach of a contract, the injured party is
    “excuse[d from] further performance” and entitled to recover
    damages. Morris v. Belfor USA Grp., Inc., 
    201 P.3d 1253
    , 1258
    (Colo. App. 2008); see, e.g., Blood v. Qwest Servs. Corp., 
    224 P.3d 301
    , 324 (Colo. App. 2009) (recognizing a nonbreaching party may
    terminate a contract following a material breach), aff’d, 
    252 P.3d 1071
     (Colo. 2011).
    ¶ 13   “Whether there has been a material breach of contract turns
    upon the importance or seriousness of the breach and the
    likelihood that the injured party nonetheless received, or will
    receive, substantial performance under the contract.” Interbank
    Invs., L.L.C. v. Vail Valley Consol. Water Dist., 
    12 P.3d 1224
    , 1228
    (Colo. App. 2000); see Lawry v. Palm, 
    192 P.3d 550
    , 567 (Colo. App.
    2008) (“A material term goes to the root of the matter or essence of
    the contract. Materiality must be assessed in the context of the
    expectations of the parties at the time the contract was formed.”).
    4
    ¶ 14   Whether a party has materially breached a contract is a
    question of fact, Interbank Invs., L.L.C., 
    12 P.3d at 1229
    , and a
    court’s determination of such a question may not be disturbed on
    appeal unless it is so clearly erroneous as to find no support in the
    record. See S. Ute Indian Tribe v. King Consol. Ditch Co., 
    250 P.3d 1226
    , 1232 (Colo. 2011) (reviewing factual findings by trial court).
    ¶ 15   The trial court determined that Gravina materially breached
    the contract because “Gravina did not substantially perform the
    terms of the contract and the Frederiksens did not receive what
    they substantially contracted for.”
    ¶ 16   The court found that the Frederiksens wanted new steel siding
    installed “to reduce maintenance on the house” and to eliminate
    their woodpecker problems. Thus, the Frederiksens “wanted the
    [new] siding installed prior to the arrival of the woodpeckers in the
    spring.” The timeframes given by Gravina — starting work in
    February or March 2018, and taking a month to complete — were,
    the court found, “acceptable to the Frederiksens because [they]
    allowed the work to be completed prior to the woodpeckers nesting.”
    And “[a]ssuming the maximum four week[s] for completion, as
    testified to by Brenda Frederiksen and Mike Gravina, the job should
    5
    have been finished by April 23[, 2018].” But the project was not
    completed even as of August 7, 2018.
    ¶ 17   Further, Gravina hired three separate subcontractors, at
    different times, to install the siding. The first one — a single person
    operation — was on the job less than one week before he quit. And
    the court found that (1) the second subcontractor’s crew did
    “unsatisfactory work, . . . much of [which] had to be redone by [the
    third subcontractor/crew]”; and (2) the third subcontractor’s crew,
    which was “on the job for over two months,” neither completed the
    job,2 nor complied with a product manual “regarding installation as
    [Gravina] had agreed.”
    ¶ 18   The trial court’s findings are supported by the record.
    ¶ 19   Gravina asserts that the court erred in finding it materially
    breached the contract by failing to timely complete the work. As
    Gravina points out, there is no time specified in the written contract
    for completing the work. Per the contract, the installation was to
    begin ten to fourteen weeks from the November 29, 2017, contract
    2Gravina’s expert witness, Ryan Phillips, testified that 1,300 of the
    3,000 square feet of siding installation on the home was not
    completed, not including “soffits and things of that nature.”
    6
    date — between February 7 and March 4, 2018 — but no
    completion date or time estimate was mentioned.3
    ¶ 20   Nonetheless, the trial court correctly recognized that if a
    contract contains no explicit provision concerning the time for a
    party’s performance of obligations, the party must perform within a
    “reasonable time” as determined by the circumstances of the case.
    See Shull v. Sexton, 
    154 Colo. 311
    , 317, 
    390 P.2d 313
    , 316 (1964);
    see also Ranta Constr. Inc. v. Anderson, 
    190 P.3d 835
    , 841 (Colo.
    App. 2008) (“‘[I]n the absence of a specific time for performance in
    the contract, the law implies a reasonable time,’ measured by the
    circumstances of the case.” (quoting Adams v. City of Westminster,
    
    140 P.3d 8
    , 11 (Colo. App. 2005))).
    ¶ 21   A reasonable time is “determined upon consideration of the
    subject matter of the contract, what was contemplated at the time
    the contact was made, and other surrounding circumstances.” Hall
    v. Add-Ventures, Ltd., 
    695 P.2d 1081
    , 1089 (Alaska 1985) (citing
    Shull, 154 Colo. at 316-17, 
    390 P.2d at 316
    ).
    3 The contract did include a “time of essence” clause, but the clause
    favored Gravina.
    7
    ¶ 22   The trial court heard evidence that (1) the parties entered a
    contract in late November 2017 stating that the project was to start
    as early as February 7, 2018, but no later than thirty days after
    March 4, 2018; (2) Mike Gravina had estimated that the job would
    take up to four weeks, a number confirmed as a reasonable
    estimate by Jason Castro and expert witnesses hired by each party;
    and (3) the Frederiksens hoped to finish the project in the spring.
    ¶ 23   Based on this evidence, we cannot disturb the court’s
    conclusion that Gravina’s completion of the project within a
    “reasonable time” of, say, a month (or, even by the end of spring)
    was a “material” term of the contract.
    ¶ 24   Nor will we disturb the trial court’s conclusion that Gravina
    breached this term, given evidence that (1) Gravina started the
    project on March 23, 2018; (2) Gravina’s first subcontractor quit
    within his first week on the job; (3) its second subcontractor started
    work near the originally estimated completion date, worked for
    another month, and only completed about thirty percent of the job,
    much of which was “unacceptable”; and (4) its third subcontractor
    began on June 4, 2018 — about two months after the originally
    estimated completion date — and by August 7, two months later,
    8
    had completed siding only 1,700 of 3,000 square feet of the
    Frederiksens’ home.4
    ¶ 25   Delays understandably happen in construction, but a
    four-month extension on a one-month job — even then completing
    only part of the work — is indicative of a project gone wrong. As the
    trial court noted, the delays on the Frederiksens’ home were not
    due to matters for which the contract made allowance, i.e., “strikes,
    weather conditions, acts of God, or unavailability of materials at
    prices acceptable to the parties.” Nor could it have been due to the
    “unavailability of labor”: according to the evidence, Gravina’s
    business model depends on hiring subcontractors to fulfill its
    contracts; any difficulty finding subcontractors with adequate
    experience and skills to satisfactorily complete its contracts does
    not absolve it of the responsibility to do so in a reasonable time.
    ¶ 26   Nonetheless, Gravina asserts that if it had to complete the
    project within a “reasonable time,” it was at least entitled to a notice
    4 In their opening brief, the Frederiksens use these numbers to
    calculate the job being 57% completed. At trial, Gravina’s expert
    witness called such assertion “misleading” because it did not
    include other work such as soffits, wraps, and other perimeter
    component installation that precedes the installation of siding.
    9
    of deadline before being considered in breach of the contract.
    Because, however, Gravina did not argue or otherwise raise this
    matter in the trial court, we decline to address it. Brown v. Am.
    Standard Ins. Co., 
    2019 COA 11
    , ¶ 21 (“[I]ssues not raised in or
    decided by the trial court generally will not be addressed for the
    first time on appeal.”).5
    ¶ 27   Additionally, the trial court’s findings and the evidence in the
    record reflect that Gravina’s breach of contract was not limited to
    failing to complete the project within a reasonable time. The court
    also found that the third subcontractor did not always follow the
    siding manufacturer’s installation instructions (after the meeting in
    which Gravina agreed to do so), and that the work before that
    subcontractor’s arrival was “unsatisfactory.”6
    5 Gravina claims otherwise, citing us to three places in the record
    where it says it preserved the issue of requiring a notice of deadline.
    The closest we can find to such an argument, however, is a
    statement during Gravina’s closing remarks simply that the
    Frederiksens’ termination of the contract was “improper.” See
    United States v. Dunkel, 
    927 F.2d 955
    , 956 (7th Cir.1991) (“A
    skeletal ‘argument,’ really nothing more than an assertion, does not
    preserve a claim [for appeal].”) (citation omitted).
    6Additionally, the evidence was in conflict as to whether the final
    work, though largely incomplete, was acceptable. Gravina’s expert
    Ryan Phillips testified that the “work overall was quality,” “a lot of
    10
    ¶ 28   Accordingly, we perceive no error in the court’s determination
    that, by failing to complete the work in a timely and satisfactory
    manner, Gravina breached material terms of the contract and that,
    consequently, the Frederiksens were entitled to terminate the
    agreement and recover actual damages. See Kaiser v. Mkt. Square
    Disc. Liquors, Inc., 
    992 P.2d 636
    , 641 (Colo. App. 1999).
    III.   The Frederiksens’ Appeal
    ¶ 29   Although it concluded that Gravina had breached its contract
    with the Frederiksens, the trial court nonetheless determined that
    Gravina was “due some restitution for the work that it did” in
    partially completing the installation of siding on the home.
    A.    Gravina’s Unjust Enrichment Claim
    ¶ 30   The Frederiksens contend that the trial court erred in
    concluding that Gravina could recover under an unjust enrichment
    theory. More specifically, they assert that (1) unjust enrichment is
    not an appropriate remedy where a contract exists; (2) Gravina
    the work is simply incomplete as opposed to defective,” and much of
    the work complied with the installation instructions. Conversely,
    the Frederiksens’ expert Phillip Blankenship testified that the
    quality of the work “seemed to vary around different areas of the
    house,” and their other expert, Jeff Whitmore, described the work
    as “poor” and recommended re-installing the entire job.
    11
    acted with “unclean hands”; and (3) Gravina bestowed no benefit
    upon them. We disagree, in all three instances.
    ¶ 31   Initially, we reject Gravina’s assertion that, by not arguing
    these points at trial, the Frederiksens forfeited the right to raise
    them on appeal. In its first amended complaint, Gravina had
    alleged a claim of unjust enrichment “[i]n the event that [the trial
    court] determines . . . that the contract between the parties is not a
    valid and binding [one].” But outside a couple of other pre-trial
    filings mentioning the pleadings, neither party referenced the words
    “unjust enrichment,” much less presented any argument on the
    subject in the trial court. Consequently, the trial court essentially
    entered a sua sponte ruling on the claim. In that circumstance,
    “the merits of [the court’s] ruling are subject to review on appeal,
    whether timely objections were made or not.” Rinker v. Colina-Lee,
    
    2019 COA 45
    , ¶ 26; see also In re Estate of Ramstetter, 
    2016 COA 81
    , ¶ 71 n.7 (referencing “the rule that where a trial court addresses
    an argument, whether that argument was preserved is moot”).
    ¶ 32   Turning to the merits of the Frederiksens’ arguments, “[u]nder
    contract law, a party to a contract cannot claim its benefit where he
    is the first to violate its terms.” Coors v. Sec. Life of Denver Ins. Co.,
    12
    
    112 P.3d 59
    , 64 (Colo. 2005). Consequently, per the preceding
    section, Gravina was not entitled to recover under the contract.
    ¶ 33   However, “[g]enerally speaking, ‘a person who is unjustly
    enriched at the expense of another is subject to liability in
    restitution.’” Scott v. Scott, 
    2018 COA 25
    , ¶ 47 (quoting
    Restatement (Third) of Restitution and Unjust Enrichment § 1 (Am.
    Law Inst. 2011) (hereinafter Restatement)).
    ¶ 34   “To prevail on an unjust enrichment claim, a party ‘must prove
    that (1) the defendant received a benefit (2) at the plaintiff’s expense
    (3) under circumstances that would make it unjust for the
    defendant to retain the benefit without commensurate
    compensation.’” Pulte Home Corp. v. Countryside Cmty. Ass’n, 
    2016 CO 64
    , ¶ 63 (quoting Lewis v. Lewis, 
    189 P.3d 1134
    , 1141 (Colo.
    2008)).7
    7 The Frederiksens contend that, under DCB Construction Co. v.
    Central City Development, Co., 
    965 P.2d 115
    , 123 (Colo. 1998), a
    party must satisfy an additional element for an unjust enrichment
    recovery, that is, that the benefitted party engaged in “improper,
    deceitful, or misleading conduct.” See id. at 122-23 (holding that
    for a tenant’s contractor to recover from the landlord on an unjust
    enrichment claim, the contractor must show some malfeasance by
    the landlord). Our supreme court, however, has rejected the
    Frederiksens’ contention, limiting DCB to the landlord-tenant
    contract context as a “particularized analysis” that “did not extend
    13
    ¶ 35   But,
    [a] party generally cannot recover for unjust
    enrichment . . . where there is an express
    contract addressing the subject of the alleged
    obligation to pay. Colorado appellate courts
    have recognized only two exceptions to this
    rule — a party may still recover for unjust
    enrichment when (1) the express contract fails
    or is rescinded, or (2) the claim covers matters
    that are outside of or arose after the contract.
    Id. at ¶ 64 (citations omitted).
    ¶ 36   There was a contract here, obligating the Frederiksens to pay
    upon completion of the project. Applying the general rule, Gravina
    would appear to be barred from recovering anything under the
    rubric of unjust enrichment.
    ¶ 37   But maybe not: it depends on whether one of the exceptions to
    the general rule applies here.
    ¶ 38   The phrase “when the contract fails” certainly encompasses
    contracts that are unenforceable for some reason, but it also
    appears to encompass other situations as well. See Pulte Home
    Corp., ¶ 64 (citing Dudding v. Norton Frickey & Assocs., 
    11 P.3d 441
    , 445 (Colo. 2000), as an example of a “fail[ed]” or rescinded
    to all unjust enrichment claims.” Lewis v. Lewis, 
    189 P.3d 1134
    ,
    1142 (Colo. 2008).
    14
    contract); Dudding, 11 P.3d at 442 (client terminated attorney’s
    services rendered pursuant to a contingency fee agreement).
    ¶ 39   In Interbank Investments, LLC v. Eagle River Water &
    Sanitation District, 
    77 P.3d 814
     (Colo. App. 2003), a division of our
    court, in considering a contract dispute, cited, with approval, the
    analysis in United Coastal Industries, Inc. v. Clearheart Construction
    Co., 
    802 A.2d 901
     (Conn. Ct. App. 2002), where the court allowed a
    subcontractor who breached its contract with the general
    contractor, and therefore had no remedy under that contract, to
    recover on the basis that the general contractor had been unjustly
    enriched by the subcontractor’s partial performance. The court
    explained that unjust enrichment “applies when no remedy is
    available based on the contract.” Interbank Inv., LLC, 
    77 P.3d at 818
     (quoting United Coastal Indus., 802 A.2d at 906).
    ¶ 40   The Restatement also recognizes that a party who breaches a
    contract may nonetheless be entitled to recover under a theory of
    unjust enrichment:
    (1) A performing party whose material breach
    prevents a recovery on the contract has a
    claim in restitution against the recipient of
    performance, as necessary to prevent unjust
    enrichment.
    15
    (2) Enrichment from receipt of an incomplete
    or defective contractual performance is
    measured by comparison to the recipient’s
    position had the contract been fully performed.
    The claimant has the burden of establishing
    the fact and amount of any net benefit
    conferred.
    (3) A claim under this section may be
    displaced by a valid agreement of the parties
    establishing their rights and remedies in the
    event of default.
    (4) If the claimant’s default involves fraud or
    other inequitable conduct, restitution may on
    that account be denied.
    Restatement § 36; see, e.g., New Windsor Volunteer Ambulance
    Corps, Inc. v. Meyers, 
    442 F.3d 101
    , 118 (2d Cir. 2006) (“[W]here a
    valid agreement exists between the parties, an action in quantum
    meruit to prevent unjust enrichment ordinarily is not available.
    However, a plaintiff whose breach was not willful and deliberate
    may, in some instances, recover [on an unjust enrichment theory]
    so much as his efforts have actually benefited the non-breaching
    party.”) (citation omitted); In re Palmdale Hills Prop., LLC, 
    577 B.R. 858
    , 861 (Bankr. C.D. Cal. 2017) (“California law allows a breaching
    party to recover under an unjust enrichment theory for the benefit
    conferred upon the non-breaching party minus damages to the
    16
    non-breaching party.”); David M. Somers & Assocs., P.C. v. Busch,
    
    927 A.2d 832
    , 841 (Conn. 2007) (“When a contracting party has
    unjustifiably breached a contract, the breaching party cannot
    recover restitution damages unless” the breaching party has made a
    claim for unjust enrichment.); Am. Nat’l Bank & Tr. Co. v. St. Joseph
    Valley Bank, 
    391 N.E.2d 685
    , 687 (Ind. Ct. App. 1979) (“A
    breaching party may recover, apart from the contract, in quantum
    meruit.”); ARC LifeMed, Inc. v. AMC-Tenn., Inc., 
    183 S.W.3d 1
    , 25
    (Tenn. Ct. App. 2005) (“A party who has materially breached a
    contract cannot recover on the contract. Nevertheless, under
    proper conditions . . . he may recover in quantum meruit. The rule
    is: ‘Even though a contract be entire, the party who breaches the
    same may recover of the other party, as on a quantum merit, the
    value of benefits conferred on such other party by partial
    performance — these benefits being accepted and retained. Any
    damage, of course, which the party not in default suffered by the
    breach [is] also to be taken into account.’” (quoting Nat’l Life &
    Accident Ins. Co. v. Hamilton, 
    98 S.W.2d 107
    , 108 (Tenn. 1936))).
    ¶ 41   Persuaded by these authorities, we conclude that where a
    contract exists, absent a provision explicitly addressing remedies
    17
    with respect to the default at issue, a party that breaches the
    contract may nonetheless recover for the other party’s unjust
    enrichment.
    ¶ 42   But, the Frederiksens assert, there is a provision in the
    contract explicitly addressing remedies in the event of Gravina’s
    breach. In this regard, they point to the line in the contract stating
    “cash to be paid on completion.” They argue the provision requires
    them to pay “only when” the project is complete. When read in
    context, however, the provision addresses only payment of the
    balance owed under the contract upon completion of the project. It
    does not address what happens in the event that the contract is
    terminated before the project is completed.
    ¶ 43   Even so, the Frederiksens assert that Gravina could not
    recover for unjust enrichment because it was guilty of “inequitable
    conduct.” See Wilson v. Prentiss, 
    140 P.3d 288
    , 293 (Colo. App.
    2006) (“Under the doctrine of unclean hands, a court considering
    equitable claims may exercise its discretion to deny the remedy
    sought.”). According to them, Gravina acted with “unclean hands”
    in breaching the contract. But the concept of “unclean hands”
    must encompass something more than simply engaging in an act or
    18
    omission that breaches a contract. It requires “improper ” conduct.
    See Salzman v. Bachrach, 
    996 P.2d 1263
    , 1269 (Colo. 2000) (“Many
    different forms of improper conduct may bar a plaintiff's equitable
    claim, and the conduct need not be illegal. Generally, courts apply
    this doctrine only when a plaintiff's improper conduct relates in
    some significant way to the claim he now asserts.”). No intentional
    misconduct on Gravina’s part, however, is even suggested in the
    record. See Int’l Network, Inc. v. Woodard, 
    2017 COA 44
    , ¶¶ 38-39
    (Unclean hands doctrine applied where “seller admitted that he had
    intentionally breached the referral provision and agreed that his
    purpose in concealing his negotiations was to deprive broker of its
    commission.”).
    ¶ 44   Finally, we reject the Frederiksens’ assertion that they received
    no benefit from Gravina’s efforts. The court found that, while “the
    amount of work that remained to be done or needed to be redone
    was in conflict,” the Frederiksens received a benefit “in the form of
    installation of siding on a portion of their home . . . done at
    [Gravina’s] expense.” This finding is supported by the evidence,
    including that of the Frederiksens’ expert, who opined that the
    Frederiksens benefitted despite Gravina’s failure to strictly adhere
    19
    to the procedures provided in a product manual for installing the
    siding.8
    ¶ 45   Consequently, we perceive no error in the court’s conclusion
    that Gravina was entitled to pursue a claim of unjust enrichment.
    B.    Negligent Supervision
    ¶ 46   The Frederiksens contend that the trial court erred by not
    applying the doctrine of res ipsa loquitur to the Frederiksens’ claim
    of negligent supervision against the individual third-party
    defendants. We disagree.
    ¶ 47   The court did not directly address the res ipsa loquitur issue
    in its order, finding only that the Frederiksens “failed to prove” their
    claim.
    ¶ 48   “Whether res ipsa loquitur is applicable is a question of law for
    the trial court.” Minto v. Sprague, 
    124 P.3d 881
    , 886 (Colo. App.
    2005). On appeal, we review the trial court’s determination de
    novo. Boulders at Escalante LLC v. Otten Johnson Robinson Neff &
    Ragonetti PC, 
    2015 COA 85
    , ¶ 19.
    8 On this particular point, Gravina’s expert testified that many of
    the Frederiksens’ examples of failing to follow the manual were
    misinterpretations of its content, and that failing to strictly follow
    the manual to the letter would not necessarily void any warranty.
    20
    For res ipsa loquitur to apply, the plaintiff
    must establish that it is more probable than
    not that: “(1) the event is of the kind that
    ordinarily does not occur in the absence of
    negligence; (2) responsible causes other than
    the defendant’s negligence are sufficiently
    eliminated; and (3) the presumed negligence is
    within the scope of the defendant’s duty to the
    plaintiff.”
    Chapman v. Harner, 
    2014 CO 78
    , ¶ 5 (quoting Kendrick v. Pippen,
    
    252 P.3d 1052
    , 1061 (Colo. 2011)).
    ¶ 49   According to the Frederiksens, (1) “it is undisputed that the
    [individual] third-party defendants . . . had a duty to the
    Frederiksens to see that the job was properly done”; (2) the
    individual third-party defendants “were the only people responsible
    for supervising the project”; and (3) other explanations for the
    failure of the individual third-party defendants to produce their end
    of the contract “have been eliminated.” Consequently, they assert,
    the elements of res ipsa loquitur regarding their claim of negligent
    supervision were met.9
    9There is some question whether a claim of negligent supervision
    can be pursued against individuals or entities that hire independent
    contractors. The proper tort claim in that situation may well be for
    negligent selection, rather than negligent supervision, of the
    contractors. See W. Stock Ctr., Inc. v. Sevit, Inc., 
    195 Colo. 372
    ,
    375-78, 
    578 P.2d 1045
    , 1048-49 (1978). We need not resolve that
    21
    ¶ 50   Not quite.
    ¶ 51   To establish a claim of negligent supervision, a plaintiff must
    prove (1) the defendant owed the plaintiff a legal duty to supervise
    others; (2) the defendant breached that duty; and (3) the breach of
    the duty caused the harm that resulted in damages to the plaintiff.
    Settle v. Basinger, 
    2013 COA 18
    , ¶ 23 (citing Keller v. Koca, 
    111 P.3d 445
    , 447 (Colo. 2005)).
    ¶ 52   “The duty to supervise an agent or employee arises when the
    principal or employer ‘has reason to know’ that the agent or
    employee ‘is likely to harm others’ because of ‘his [or her] qualities’
    and ‘the work or instrumentalities entrusted to him [or her].’” Id. at
    ¶ 26 (emphasis added) (quoting Destefano v. Grabrian, 
    763 P.2d 275
    , 287 (Colo. 1988)).
    Thus, there is no liability for breach of the
    duty to supervise unless the principal or
    employer both knows the agent or employee is
    . . . ‘incompetent, vicious, or careless,’ and
    does not take ‘the care which a prudent
    issue in this case, though. For purpose of appeal, we assume,
    without deciding, that the Frederiksens could assert a negligent
    supervision claim here.
    22
    [person] would take in selecting the person for
    the business in hand.’”10
    
    Id.
     (quoting Destefano, 763 P.2d at 287).
    ¶ 53   So far as we can discern, nothing in the record suggests that
    the individual third-party defendants had any reason to know that
    any of the subcontractors were likely to harm others “because of
    their personal qualities” and “the work or instrumentalities
    entrusted to them.” Id. at ¶ 29. Consequently, regardless of
    whether the subcontractors’ negligence caused the Frederiksens’
    injuries, the individual third-party defendants did not owe the
    Frederiksens a legal duty to supervise them.
    ¶ 54   We perceive no error in the court’s failure to apply a negligence
    doctrine to a situation in which no duty of care for supervising
    others was shown to exist.
    10The court in Settle v. Basinger, 
    2013 COA 18
    , added a “not” that
    did not appear in Destefano v. Grabrian, 
    763 P.2d 275
     (Colo. 1988).
    The ellipsis in our use of the quote represents removal of the errant
    word.
    23
    C.    Exclusion of Expert Evidence
    ¶ 55   The Frederiksens contend that the trial court erred by
    excluding expert witness evidence related to the repair costs of roof
    damage allegedly caused by Gravina. We disagree.
    1.      Facts
    ¶ 56   The trial in this case was held, after two continuances, on July
    13-15, 2020. On August 22, 2019 — during Gravina’s inspection of
    the property — Gravina and the Frederiksens discovered damage to
    the Frederiksens’ fireproof metal roof allegedly caused by Gravina.
    ¶ 57   The trial court ordered the Frederiksens to identify all expert
    witnesses by March 6 and to disclose all expert witness reports by
    March 16. The Frederiksens timely disclosed expert witness Eli
    Grasmick and a report he had written. The report did not, however,
    include a roofing repair estimate.
    ¶ 58   On June 3, 2020, the Frederiksens received another report
    from Grasmick, in which he estimated the cost of repairing the roof
    at $41,872.47.
    ¶ 59   Gravina deposed Grasmick on June 9, 2020. The
    Frederiksens had not, however, disclosed Grasmick’s second report
    to Gravina before Gravina deposed him. Instead, they disclosed
    24
    Grasmick’s roof repair estimate to Gravina on June 16, 2020. On
    that same day, the Frederiksens also disclosed to Gravina a second
    roof repair estimate of $78,539.32 from an individual (i.e., Byron
    Franks) who had not been endorsed as an expert witness under
    C.R.C.P. 26(a)(2)(B).
    ¶ 60   On June 19, the Frederiksens filed an exhibit list containing
    Grasmick’s and Franks’s estimates for repairing the roof and
    Gravina filed a motion in limine to exclude the roof-related
    evidence. The trial court granted Gravina’s motion in part,
    excluding evidence of the roof repair estimates.
    ¶ 61   At trial, the Frederiksens questioned their expert, Phillip
    Blankenship, about damage to the home. When Blankenship began
    to discuss the roof, Gravina objected, citing the court’s pre-trial
    order, and the court sustained the objection.
    2.    Standard of Review and Applicable Law
    ¶ 62   A party must disclose the identity of any person who may
    present expert testimony at trial, as well as written reports from,
    and summaries of testimony of, experts. C.R.C.P. 26(a)(2). And
    parties must supplement their required disclosures. C.R.C.P. 26(e).
    25
    ¶ 63   C.R.C.P. 37(c)(1) provides “[a] party that without substantial
    justification fails to disclose information required by C.R.C.P. 26(a)
    or 26(e) shall not be permitted to present any evidence not so
    disclosed at trial . . . , unless such failure has not caused and will
    not cause significant harm, or such preclusion is disproportionate
    to that harm.”
    ¶ 64   Rule 37(c)(1) allows the “preclusion of testimony from an
    expert witness where the fact that the witness would be testifying
    was not timely disclosed.” Trattler v. Citron, 
    182 P.3d 674
    , 681
    (Colo. 2008).
    ¶ 65   The burden is on the nondisclosing party to establish that its
    failure to disclose was substantially justified or harmless, or that
    excluding the evidence would be disproportionate to the harm
    caused by the nondisclosure. See Todd v. Bear Valley Vill.
    Apartments, 
    980 P.2d 973
    , 978 (Colo. 1999).11
    11 The Todd case dealt with the prior version of the rule, which,
    before 2015, explicitly “provide[d] for the exclusion of non-disclosed
    evidence unless the failure to disclose is either substantially
    justified or harmless to the opposing party.” Todd v. Bear Valley
    Vill. Apartments, 
    980 P.2d 973
    , 977 (Colo. 1999). Following the rule
    change, the supreme court said that “the harm and proportionality
    analysis under Colorado Rule of Civil Procedure 37(c)(1) remains
    the proper framework for determining sanctions for discovery
    26
    ¶ 66   “We review a trial court’s decision to exclude expert testimony
    for an abuse of discretion and will not overturn the court’s ruling
    unless it is ‘manifestly erroneous.’” Black v. Black, 
    2018 COA 7
    ,
    ¶ 111 (quoting People v. Williams, 
    790 P.2d 796
    , 797-98 (Colo.
    1990)).
    3.   Analysis
    ¶ 67   The Frederiksens do not make much of an argument on
    appeal. Other than general legal standards, they cite no authority
    in support of their “argument,” which consists merely of pointing
    out that (1) Gravina knew that the Frederiksens claimed the roof
    had been damaged; (2) Gravina’s expert had an opportunity to view
    the roof damage on May 20, 2020; (3) the experts’ estimates were
    provided to Gravina “as soon as they were available”; and (4) the
    trial court’s “exclusion of the roof damage evidence was unfair and
    substantially influenced the possible damages in this case.”
    ¶ 68   The record, however, shows that the Frederiksens did not
    disclose Franks’ identity as an expert or the estimates as soon as
    violations.” Cath. Health Initiatives Colo. v. Earl Swensson Assocs.,
    Inc., 
    2017 CO 94
    , ¶ 15 (citing Todd, 980 P.2d at 978).
    27
    they were available. Grasmick’s estimate, at least, was available as
    early as June 3, 2020 — nearly a week before he was deposed —
    but not disclosed to Gravina until June 16, 2020 — a week after
    Grasmick had been deposed.12
    ¶ 69   In Todd, the supreme court noted a number of factors relevant
    in determining whether a party’s failure to disclose information as
    required was justified or harmless: the importance of a witness’s
    testimony, the explanation of the party’s failure to comply with
    required disclosure, potential prejudice to the party against whom
    the testimony is offered if the testimony were admitted, the
    availability of continuance to cure, and the nondisclosing party’s
    bad faith or willfulness. 980 P.2d at 978-79.
    ¶ 70   In their briefs, the Frederiksens offer no justification for (1)
    why they couldn’t have identified Franks as an expert or obtained
    Grasmick’s estimate any earlier than a month and a half before
    12Gravina proceeded with the deposition expecting that Grasmick
    was an expert witness in the matter of the siding only. Gravina
    specifically asked Grasmick in the deposition what Paul Frederiksen
    had asked him to do for this case, and Grasmick replied “[h]e asked
    me to take a look at the siding and see if I seen [sic] anything that
    was wrong with it.”
    28
    trial, and (2) not providing Grasmick’s estimates to Gravina before
    Grasmick was deposed.13
    ¶ 71   Moreover, the Frederiksens don’t mention — much less
    attempt to apply — the remaining Todd factors. “[I]t is not this
    court’s function to speculate as to what a party’s argument might
    be.” People v. Palacios, 2018 COA 6M, ¶ 29 (quoting Beall Transp.
    Equip. Co. v. S. Pac. Transp., 
    64 P.3d 1193
    , 1196 n.2 (Or. Ct. App.
    2003)). “Nor is it our proper function to make or develop a party’s
    argument when that party has not endeavored to do so itself.” Beall
    Transp., 
    64 P.3d at
    1196 n.2.
    ¶ 72   On this record, under these facts, and based on the
    arguments made by the Frederiksens, we perceive no abuse of
    discretion on the part of the trial court in excluding the belatedly
    13 In their opening brief, the Frederiksens assert that “this delay
    was explained in detail in the Frederiksens’s response to the motion
    in limine, CF 922-935, as well as in their response re discovery,
    previously filed. CF 731-736.” This attempt to incorporate by
    reference arguments made in the trial court improperly “attempts to
    shift — from the litigants to the appellate court — the task of
    locating and synthesizing the relevant facts and arguments” and
    “‘makes a mockery’ of the rules that govern the length of briefs.”
    Castillo v. Koppes-Conway, 
    148 P.3d 289
    , 291 (Colo. App. 2006)
    (citation omitted); accord People v. Gutierrez-Vite, 
    2014 COA 159
    ,
    ¶ 28.
    29
    disclosed expert evidence. See Redden v. Clear Creek Skiing Corp.,
    
    2020 COA 176
    , ¶ 21 (“If [the party] wanted a weightier resolution of
    the issue, it should have mounted a weightier contention. Gravitas
    begets gravitas.” (quoting CSX Transp., Inc. v. Miller, 
    858 A.2d 1025
    ,
    1083 (Md. Ct. Spec. App. 2004))).
    D.     The Court’s Remedy
    ¶ 73   The Frederiksens contend that the trial court should have
    awarded them damages rather than awarding restitution to
    Gravina. We conclude that a remand is necessary.
    ¶ 74   As noted supra Part II, the Frederiksens were entitled to
    recover damages for Gravina’s breach of contract.
    ¶ 75   But, as noted supra Part III.A, the Frederiksens were not
    entitled to be unjustly enriched at Gravina’s expense.
    ¶ 76   Consequently, Gravina could recover the reasonable value of
    the benefit conferred upon the Frederiksens minus the damages the
    Frederiksens incurred as a result of Gravina’s breach of contract.
    See In re Palmdale Hills Prop., LLC, 577 B.R. at 861; ARC LifeMed,
    Inc., 
    183 S.W.3d at 25
    . 14
    14If, however, this calculation resulted in a negative number, the
    Frederiksens would recover the difference from Gravina.
    30
    ¶ 77   The trial court purported to apply this rule. Contrary to the
    Frederiksens’ assertion, the court awarded damages to the
    Frederiksens. That it did so is apparent from its statement that it
    took the Frederiksens’ damages into account in determining that
    Gravina was entitled to a restitutionary award of $19,000.
    ¶ 78   We review a trial court’s determinations about the amount of
    damages or restitution under an abuse of discretion standard. See
    Zeke Coffee, Inc. v. Pappas-Alstad P’ship, 
    2015 COA 104
    , ¶ 11
    (restitution); McDonald’s Corp. v. Brentwood Ctr., Ltd., 
    942 P.2d 1308
    , 1311 (Colo. App. 1997) (damages).
    ¶ 79   But a trial court’s order must contain findings of fact and
    conclusions of law sufficient to give an appellate court a clear
    understanding of the basis of its decision. E.g., In re Marriage of
    Gedgaudas, 
    978 P.2d 677
    , 682 (Colo. App. 1999); In re Marriage of
    Rozzi, 
    190 P.3d 815
    , 822 (Colo. App. 2008) (noting the purpose of
    including findings of fact and conclusions of law in an order is to
    enable the appellate court to determine the grounds upon which the
    trial court rendered its decision). “In the absence of such findings,
    an appellate court cannot adequately assess the propriety of the
    trial court’s award.” Fed. Ins. Co. v. Ferrellgas, Inc., 
    961 P.2d 511
    ,
    31
    515 (Colo. App. 1997); see Miller v. Hancock, 
    2017 COA 141
    , ¶ 49
    (“Because the trial court failed to make findings sufficient to
    disclose the basis for its decision to award some costs while denying
    others, we cannot adequately assess the propriety of the award.”).
    ¶ 80   In our view, the trial court’s findings are not sufficient to give
    us a clear understanding of the basis for its decision. The court
    cited testimony from both parties’ experts, including opinions on
    the quality of the completed work and detailed cost estimates to
    complete (or replace) the job. It explained, to some degree, where it
    rejected the reasoning of the experts. However, it did not explain
    how it determined an award of $19,000 to Gravina was appropriate.
    It never identified how much damages Gravina’s breach caused or,
    for that matter, how much the Frederiksens benefitted as a result of
    Gravina’s efforts. All the court did was repeat certain numbers
    from the parties’ dueling experts’ testimony and conclude that when
    the Frederiksens’ damages were subtracted from the benefits they
    had received, Gravina was entitled to recover $19,000.
    ¶ 81   We have not been able to ascertain from these figures how the
    court arrived at a figure of $19,000 due to Gravina. Because we are
    unable to establish how the court arrived at its determination, we
    32
    conclude that a reversal and remand for further findings are
    necessary.
    E.    Attorney Fees
    ¶ 82   The Frederiksens contend that the trial court erred by denying
    their request for attorney fees, either under section 13-17-102,
    C.R.S. 2021, or C.R.C.P. 11. We disagree.
    ¶ 83   “Whether to award attorney fees under § 13-17-102 or as a
    sanction under C.R.C.P. 11 is a decision committed to the
    discretion of the trial court, whose ruling will not be disturbed on
    appeal absent an abuse of discretion.” E-470 Pub. Highway Auth. v.
    Jagow, 
    30 P.3d 798
    , 805 (Colo. App. 2001), aff’d, 
    49 P.3d 1151
    (Colo. 2002).
    1.    C.R.C.P. 11
    ¶ 84   Under Rule 11, an attorney filing a complaint has an
    “obligation to have determined it was well grounded in fact and
    warranted by existing law.” Belinda A. Begley & Robert K. Hirsch
    Revocable Tr. v. Ireson, 
    2020 COA 157
    , ¶ 49.
    ¶ 85   In the trial court, the Frederiksens linked their request for
    Rule 11 fees to Gravina’s motions to exclude expert testimony and
    roofing repair estimates. On appeal, however, they attempt to
    33
    connect it to a different subject, i.e., Gravina’s president’s
    acknowledgment that he knew some work could not be completed
    in a day. Because they did not present this argument to the trial
    court, we do not consider it. See In re Estate of Colby, 
    2021 COA 31
    , ¶ 35 (“Arguments never presented to, considered or ruled upon
    by a trial court may not be raised for the first time on appeal.”
    (quoting Est. of Stevenson v. Hollywood Bar & Cafe, Inc., 
    832 P.2d 718
    , 721 n.5 (Colo. 1992))).
    2.    Section 13-17-102
    ¶ 86   Under section 13-17-102(2), reasonable attorney fees shall be
    awarded “against any attorney or party who has brought or
    defended a civil action, either in whole or in part, that the court
    determines lacked substantial justification.” (Emphasis added.) As
    pertinent here, “lack[s] substantial justification” means
    “substantially groundless.” § 13-17-102(4).
    ¶ 87   “A claim is substantially groundless if the allegations in the
    complaint, while sufficient to survive a motion to dismiss for failure
    to state a claim, are not supported by any credible evidence at
    trial.” City of Aurora ex rel. Util. Enter. v. Colo. State Eng’r, 
    105 P.3d 595
    , 618 (Colo. 2005).
    34
    ¶ 88   For purposes of section 13-17-102, “something can be
    ‘credible’ without the necessity of its ultimately being “believed” or
    accepted by the trier of fact.” In re Estate of Shimizu, 
    2016 COA 163
    , ¶ 21. Indeed, in this context, the term “‘credible’ relates ‘not to
    some quantum measure of evidence nor to a fact-finder’s subjective
    weighing of the quality (credit-worthiness) of evidence . . . but to an
    objective recognition of the matter offered as being evidence capable
    of being believed and capable of supporting a fact-finding.’” 
    Id.
    (quoting Hlad v. State, 
    565 So. 2d 762
    , 777 (Fla. Dist. Ct. App.
    1990) (Cowart, J., dissenting)).15
    ¶ 89   Here, although unsuccessful, Gravina presented “credible”
    evidence to support its breach of contract and breach of covenant of
    good faith claims. In support of its position that it had
    “substantially completed the work,” Gravina could point to evidence
    showing that the siding was about 57% finished, that much other
    15 In In re Estate of Shimizu, the division took pains to emphasize
    that “Judge Cowart went on to note that the word ‘credible’ is
    ‘intended to exclude only evidence that is inherently incredible,
    such as asserted facts or events that are contrary to commonly
    known and generally accepted scientific or mathematical principles,
    geographic facts, natural laws or common sense.’” 
    2016 COA 163
    ,
    ¶ 21 n.1 (quoting Hlad v. State, 
    565 So. 2d 762
    , 777 (Fla. Dist. Ct.
    App. 1990) (Cowart, J., dissenting)).
    35
    time-consuming work (such as installation of wrap and perimeter
    components) had been completed before installing that siding, and
    that the project could have been finished in about another week’s
    time. Similarly, in support of its position that the Frederiksens
    interfered with Gravina’s performance under the contract, Gravina
    could point to evidence that the Frederiksens had (1) “kicked” its
    second subcontractor’s workers off the job site (due to mistakes
    they had made on the job) and (2) posted “No Trespassing” signs
    and threatened to contact law enforcement if the third
    subcontractor or anyone from Gravina tried to re-enter the
    property.
    ¶ 90   Finally, we reject the Frederiksens’ assertion that they were
    entitled to attorney fees with respect to Gravina’s lien forfeiture
    claim. The Frederiksens did not file a motion for attorney fees
    following the court’s dismissal of this claim, and the district court
    did not otherwise address it. Because they did not present this
    argument to the trial court, we do not consider it.
    ¶ 91   Consequently, we conclude the court did not abuse its
    discretion when it denied the Frederiksens’ fee request under
    section 13-17-102.
    36
    IV.   Attorney Fees and Costs Incurred on Appeal
    ¶ 92   The Frederiksens and Gravina request awards of attorney fees
    and costs incurred on appeal. We conclude that neither party is
    entitled to such an award.
    ¶ 93   The Frederiksens request their award under section 13-17-
    102, C.R.C.P. 11, and C.A.R. 38 because Gravina’s “action has been
    groundless from its inception.” But, given the manner in which
    we’ve resolved the issues, this could not be the case.
    ¶ 94   Gravina requests its award of fees under the fee-shifting
    provision of the contract, which provides that, “[i]n the event of any
    breach of this Agreement by Buyer, including but not limited to
    Buyer’s failure to make any payment when due, Seller shall be
    entitled to recover any loss sustained, including costs incurred by
    it, and reasonable attorneys’ fees.” Because the Frederiksens were
    not found to have breached the agreement, however, no recovery of
    fees under this provision is warranted.
    V.   Disposition
    ¶ 95   The judgment is affirmed in part, reversed in part, and the
    case is remanded to the trial court for further proceedings
    consistent with the views expressed in Part III.D of this opinion.
    37
    JUDGE FOX and JUDGE SCHUTZ concur.
    38