delivered the opinion of the Court.
Appraisal clauses, a common component of insurance contracts, spell out how parties will resolve disputes concerning a property’s value or the amount of a covered loss. When the parties disagree, but neither seeks appraisal until one has filed suit, has the party demanding appraisal waived its right to insist on the contractual procedure? Because we conclude that, absent conduct indicating waiver and a showing of prejudice, it has not, we conditionally grant relief.
I. Background
Grubbs Infiniti, a car dealership in the Dallas-Fort Worth area, suffered hail damage to buildings on its property. When Grubbs filed a claim with its insurer, *406 Universal Underwriters, a claims representative inspected the property. Universal subsequently paid Grubbs $4,081.95 for the damage. Grubbs asked Universal to reinspect the property, contending that the claim had not been properly investigated or fully paid. Universal sent an engineer to reinspect the property, after which it issued a $3,000 supplemental payment to cover scuff marks on the roof. In November'2008, Universal explained that
[i]f you would like to have your roof expert discuss the findings with [the engineer], please advise and we will put the two parties in touch with one another. We will hold our file open for 15 days pending any further contact from you regarding this matter.
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... Should you disagree with [Universal’s] decision as set forth in this letter, please review your policy and govern yourself accordingly being mindful of the policy requirement that legal action contesting [Universal’s] decision on this claim must be brought within 24 months and 1 day from the date you discover the loss, but no sooner than 90 days after you file a sworn proof of loss. Please feel free to contact me ... if you should have any questions.
Universal also sent Grubbs a copy of the engineer’s roof inspection report. Grubbs made no further inquiries or demands for payment.
Four months later, Grubbs sued Universal for underpayment of its claim, alleging breach of contract, breach of the duty of good faith and fair dealing, as well as violations of the Deceptive Trade Practice-Consumer Protection Act, Insurance Code, and Prompt Payment of Claims Act. In response, Universal invoked the policy’s appraisal clause, which provides, in pertinent part,
[i]f YOU or WE can’t agree on the value of the property or the amount of YOUR property LOSS, either of us can demand in writing, an appraisal within 20 days of such demand. Then, each will select a competent and disinterested appraiser who will, in turn, select a competent and disinterested umpire....
The appraisal shall be then made at a reasonable time and place. Each appraiser will state his appraisal of the value or LOSS. If they can’t agree, they will submit their differences to the umpire. The value of the property or amount of the LOSS will be determined by a written agreement of any two of them. Such an agreement is binding.
Universal moved to compel an appraisal and to abate all other proceedings in the interim. Grubbs alleged that Universal waived its right to appraisal by not invoking it sooner. When the trial court denied the motion, Universal unsuccessfully sought mandamus relief from the court of appeals.
II. Waiver of appraisal clauses
Appraisal clauses, commonly found in homeowners, automobile, and property
*407
policies in Texas, provide a means to resolve disputes about the amount of loss for a covered claim.
See State Farm Lloyds v. Johnson,
Indeed, appraisals have proceeded for well over a century with little judicial involvement.
Id.
at 889 (noting that only five of our prior decisions involved appraisals). Of our three cases to address waiver of appraisal clauses, only one found that waiver had actually occurred.
See Del. Underwriters v. Brock,
We have explained that
[to] constitute waiver the acts relied on must be such as are reasonably calculated to induce the assured to believe that a compliance by him with the terms and requirements of the policy is not desired, or would be of no effect if performed. The acts relied on must amount to a denial of liability, or a refusal to pay the loss.
Scottish Union,
Grubbs asserts that Universal waived its right to invoke appraisal by waiting eight months, from the date that Grubbs asked for a reinspection of its property to the date that Grubbs sued, before demanding an appraisal. Grubbs argues that this delay was unreasonable as a matter of law, citing a number of cases in which our courts of appeals found appraisal demands untimely when made as little as thirty-nine days from the date of disagreement.
See, e.g., Int’l Serv. Ins. Co. v. Brodie,
A. Delay must be measured from the point of impasse.
Thus, while an unreasonable delay is a factor in finding waiver, reasonableness must be measured from the point of impasse, as several cases have recognized.
See In re Slavonic Mut. Fire Ins. Ass’n,
An impasse is not the same as a disagreement about the amount of loss. Ongoing negotiations, even when the parties disagree, do not trigger a party’s obligation to demand appraisal. Nor does an insurer’s offer of money to cover damages necessarily indicate a refusal to negotiate further, or to recognize additional damages upon reinspection.
See Scottish Union,
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Texas state and federal courts have cited a federal district court case from Iowa,
Terra Industries, Inc. v. Commonwealth Insurance Co. of America,
In deciding whether a demand for appraisal was made within a reasonable time, and consequently has not been waived even if suit was filed before the demand was made, courts have considered the timeliness of the demand in light of the circumstances as they existed at the time the demand was made. Pertinent circumstances include (1) the time between the breakdown of good faith negotiations concerning the amount of the loss suffered by the insured and the appraisal demand; and (2) whether there would be any prejudice to the other party resulting from the delay in demanding an appraisal.
Id. at 602 (citation omitted). In Terra, despite two and a half years of negotiations, “and evident dispute,” id. at 601, the court found that the insurer “had no notice that an impasse had been reached, because only the filing of [the insured]’s suit demonstrated [the insuredjs unilateral conclusion that the parties were at an impasse.” Id. at 603.
Other courts have relied on
Terra
to measure the point of impasse at which parties are to invoke appraisal clauses.
See, e.g., Lyon v. Am. Family Mut. Ins. Co.,
The definition of impasse as the apparent breakdown of good-faith negotiations is supported in another context as well, which we find persuasive in our analysis. Under the National Labor Relations Act, 29 U.S.C. § 151, an employer may implement unilateral changes in employment terms only after good-faith negotiations have been exhausted, and the parties have reached an “impasse.”
Beverly Farm Found, v. NLRB,
Universal invoked appraisal within a reasonable time after the parties reached an impasse. The policy contained no time limit for the appraisal request, and Universal never denied liability for the loss. At no point did Grubbs notify Universal that it refused to discuss the matter further, despite Universal’s statement that it would leave its file open for further discussions should Grubbs care to do so. Whether Universal was aware of Grubbs’ disagreement as to the estimate of damages is also irrelevant, since mere disagreement does not in itself signal an unwillingness to negotiate further.
See NLRB v. Cent. Plumbing Co.,
Grubbs contends that, because Universal’s correspondence included a provision alerting the insured of the statute of limitations on bringing suit, Universal effectively acknowledged that the parties were at an impasse (“... being mindful of the policy requirement that legal action contesting Universal Underwriter’s decision on this claim must be brought within 24 months and 1 day from the date you discover the loss ... ”). Universal counters that its letters included no statements regarding waiver of appraisal, or any suggestion that it was not open to further negotiation. To the contrary, it “specifically reserve[d] its rights under both the laws of the State of Texas and the terms of the subject policy of insurance.” Moreover, Universal stated that it would leave the file open should Grubbs want to pursue further discussions. We will not infer waiver where neither explicit language nor conduct indicates that such was the party’s intent.
Scottish Union
is again instructive. In that case, the insurer conducted an inspection in response to the insured’s claim and offered its calculation of damages.
B. Delay alone is not enough; a party must also show prejudice.
Even if Universal had waited to request appraisal, mere delay is not enough to find waiver; a party must show that it has been prejudiced.
See
15 Lee R. Russ & Thomas F. Segalla, Couch on Insurance § 210:77 (3d ed. 1999) (“In addition, a waiver will not be declared where there has been no showing of prejudice to the other party by a delay in demanding an appraisal.”);
Terra,
We have, in other instances, required a showing of prejudice to establish waiver.
See, e.g., In re ADM Investor Servs.,
In the context of waiver of arbitration clauses, which is in some ways similar to waiver of appraisal, we also require a showing of prejudice.
See Prudential Sec. v. Marshall,
Other jurisdictions have recognized that there can be no appraisal waiver absent a showing of prejudice to the other party.
See, e.g., Kester v. State Farm Fire & Cas. Co.,
Grubbs has not attempted to show prejudice here. Instead, Grubbs contends that requiring prejudice would be “new law,” and because no Texas cases have required such a showing, we should not impose such a requirement. But waiver is an equitable doctrine,
4
and we have frequently required a showing of prejudice before concluding that rights are waived.
See, e.g., In re E.I. du Pont de Nemours & Co.,
Moreover, it is difficult to see how prejudice could ever be shown when the policy, like the one here, gives both sides the same opportunity to demand appraisal. If a party senses that impasse has been reached, it can avoid prejudice by demanding an appraisal itself. This could short-circuit potential litigation and should be pursued before resorting to the courts.
III. Propriety of mandamus relief
We have held that mandamus relief is appropriate to enforce an appraisal clause because denying the appraisal would vitiate the insurer’s right to defend its breach of contract claim.
In re Allstate Cnty. Mut. Ins. Co.,
Notes
. The Insurance Council of Texas and Property Casualty Insurers Association of America submitted a brief of amici curiae in support of Universal. The Texas Apartment Association, Inc., the Texas Association of School Boards Legal Assistance Fund, and the Texas Organization of Rural & Community Hospitals, joined by the Houston Apartment Association, the Texas Building Owners and Managers Association, and United Policyholders, submitted a brief of amici curiae in support of Grubbs, as did the Texas Trial Lawyers Association, the Texas Automobile Dealers Association, and the Texas Community Association Advocates.
.
See also Dwyer v. Fid. Nat’l Prop. & Cas. Ins. Co.,
. In
Boston Insurance Company v. Kirby,
.
See Pacheco v. Rice,
. The trial court's failure to grant the motion to abate is not subject to mandamus, and the proceedings need not be abated while the appraisal goes forward.
See In re Allstate Cnty. Mut. Ins. Co.,
