BRYAN, Judge.

Gary Harrison and Patsy Harrison appeal from a summary judgment in favor of Family Home Builders, LLC ("FHB"). We affirm in part, reverse in part, and remand.

Factual Background and Procedural History

On January 5, 2007, the Harrisons and FHB entered into a written contract ("the contract") in which FHB agreed to perform remodeling and construction work ("the work") on the Harrisons' existing house in Lauderdale County. FHB began the work; however, on May 4, 2007, the Harrisons terminated the contract before FHB had completed the work.

On July 16, 2007, the Harrisons sued FHB, stating claims of breach of contract, negligence, and fraud. As the basis of their breach-of-contract claim, the Harrisons alleged (1) that FHB had agreed to perform the work in accordance with plans and specifications provided by the Harrisons and had failed to do so; (2) that FHB had failed to complete the work; (3) that FHB had agreed to perform the work in accordance with applicable building codes and had failed to do so; (4) that the work performed by FHB had defects in materials and workmanship; (5) that FHB had failed to coordinate and supervise the work in an efficient manner; and (6) that FHB had overbilled the Harrisons for costs not related to the work.

As the basis of their negligence claim, the Harrisons alleged that FHB had breached the duty of care it owed the Harrisons by failing to perform the work in a workmanlike manner, by failing to perform the work in accordance with the plans and specifications provided by the Harrisons, by failing to complete the work in a timely manner, by failing to perform the work in accordance with the applicable building codes, and by failing to coordinate and supervise the work in a proper manner.

As the basis of their fraud claim, the Harrisons alleged that, while it was performing the work, FHB had misrepresented to the Harrisons that certain costs were incurred in performing the work and that, in reliance on those misrepresentations, the Harrisons had paid FHB for materials and labor costs that had not been incurred in the performance of the work.

Answering, FHB denied the material allegations of the Harrisons' complaint. The Harrisons later amended their complaint to add a claim that FHB had negligently hired, trained, supervised, and retained ("the negligent-supervision claim") Kyle Gean, the individual who had supervised the work for FHB. Answering, FHB denied the material allegations of the Harrisons' amended complaint.

On March 29, 2010, FHB moved for a partial summary judgment with respect to the Harrisons' fraud claim. The Harrisons filed no evidence in opposition to that motion, and the trial court entered an order granting it on May 20, 2010.

On August 17, 2010, FHB moved for a summary judgment with respect to the breach-of-contract claim, the negligence claim, and the negligent-supervision claim. FHB asserted that it was not liable for breach of contract or negligence based on the allegation that it had failed to perform the work in accordance with the plans and specifications because, FHB said, the Harrisons had substantially changed the plans and specifications after the contract was executed. FHB asserted that it was not liable for breach of contract or negligence based on the allegation that it had failed to complete the work because, FHB said, it was entitled to a reasonable amount of time to complete the work because the contract neither specified a date for completion of the work nor stated that time was of the essence and the Harrisons had unilaterally terminated the contract before FHB had had a reasonable amount of time to complete the work. FHB asserted that it was not liable for breach of contract or negligence based on the allegation that it had failed to perform the work in accordance with the applicable building codes because, FHB said, the Harrisons had not produced substantial evidence indicating that FHB had failed to perform its work in accordance with the applicable building codes and, even if FHB had failed to perform its work in accordance with the applicable building codes, the evidence indicated that the Harrisons had not given FHB a reasonable amount of time to correct such failures before unilaterally terminating the contract. FHB asserted that it was not liable for breach of contract or negligence based on the allegation that there were defects in material and workmanship because, FHB said, the Harrisons had failed to produce substantial evidence indicating that there were defects in materials and workmanship. FHB asserted that it was not liable for breach of contract or negligence based on the allegation that it had failed to coordinate and supervise the work in an efficient manner because, FHB said, the Harrisons had failed to produce substantial evidence indicating that FHB had failed to coordinate and supervise the work in an efficient manner. FHB asserted that it was not liable for breach of contract based on the allegation that it had overbilled the Harrisons because, FHB said, the Harrisons had admitted that they had no evidence indicating that FHB had overbilled them. Finally, FHB asserted that it was not liable for negligent supervision because, it said, the Harrisons had not produced substantial evidence indicating that Gean was incompetent.

FHB supported its summary-judgment motion with, among other things, the deposition testimony of Gean and the contract. Gean testified as follows. He was not an employee of FHB; he acted as a subcontractor of FHB in preparing an estimate of the cost of the work before the contract was signed and in supervising the work after the contract was signed. Before the execution of the contract, he discussed the work with the Harrisons and submitted an estimate to them. His estimate was based on drawings provided by the Harrisons and quotes he had received from vendors and subcontractors. The drawings on which he based his estimate showed the addition of an outdoor kitchen, the removal of the windows from the back of the house, the removal of the windows from the garage, the removal of the doors from the garage, the addition of a concrete pad, and the remodeling of a bedroom and bathroom located in the western end of the house. Based on those drawings, Gean estimated that the work would cost $109,000 and would take approximately four months to complete. After the contract was signed, the Harrisons and their decorator, Madelyn Hereford, made substantial changes to the work. For example, in March and April 2007, the size of the outdoor kitchen was changed, the size of a pavilion was changed, a porch was added to the western side of the house, a porch was added to "the bay addition" to the house, sidewalks were added, the bay addition to the house was enlarged and changes were made to the recessed tub, the mantel, the fireplace, the tray ceiling, the coffee bar, the windows, and the french doors in that addition. Those changes increased the amount of the work to be performed, increased the cost of the work, and delayed the performance of the work because those changes required that some of the work that had been completed in accordance with the original drawings be redone. Gean estimated that approximately one-half of the work had been completed when the Harrisons unilaterally terminated the contract on May 4, 2007.

The contract signed by the parties on January 5, 2007, expressly provided that all representations made before the signing of the contract were merged into the contract. The contract neither specified a date for completion of the work nor stated that time was of the essence. Moreover, it did not specify a total price for the work. Instead, it provided that the Harrisons would pay all the costs of performing the work and, in addition, would pay FHB a contractor's fee in the amount of 13% of those costs. In addition, the contract required FHB to perform the work in accordance with plans and specifications provided by the Harrisons and to comply with "the construction requirements of all local building codes."

In opposition to FHB's summary-judgment motion, the Harrisons asserted (1) that FHB's failure to complete the work was caused by its incompetence rather than the changes made to the plans and specifications after the contract was signed; (2) that FHB's contention that the Harrisons had failed to produce substantial evidence indicating that FHB had failed to comply with the applicable building codes had no merit; (3) that FHB's contention that the Harrisons had failed to produce substantial evidence indicating that the work performed by FHB was defective had no merit; (4) that FHB's contention that the Harrisons had failed to produce substantial evidence indicating that FHB had failed to coordinate and supervise the work in a proper manner had no merit; and (5) that it was a question of fact whether FHB had had a reasonable amount of time to complete the work when the Harrisons terminated the contract.

As evidence in opposition to the summary-judgment motion, the Harrisons submitted, among other things, the affidavits of Gary Harrison and Derrick Coffman and the Harrisons' answers to FHB's interrogatories. In his affidavit, Gary Harrison testified as follows. Before the contract was signed, Gean estimated that the work would cost $109,500 and would take three to four months to complete; however, when the Harrisons terminated the contract on May 4, 2007, FHB had performed only approximately 50% of the work, yet costs of between $135,000 and $145,000 had already been incurred. Gary Harrison further testified:

FHB's interrogatory number 4, which Gary Harrison referred to in his affidavit, asked the Harrisons to describe any instances of FHB's work that they contended were negligent or defective. In answer to that interrogatory, the Harrisons stated:

Derrick Coffman's affidavit stated:

FHB moved to strike Gary Harrison's and Coffman's affidavits on the ground that they contained statements that were inadmissible because they were not based on personal knowledge or constituted hearsay. Thereafter, FHB deposed Coffman and filed a supplemental brief in support of its summary-judgment motion with excerpts from Coffman's deposition attached. FHB asserted that Coffman's testimony supported FHB's contention that the Harrisons had not given FHB a reasonable amount of time to complete the work and cited Coffman's testimony that the work required by the contract between FHB and the Harrisons was "a one year project at minimum." FHB also asserted that Coffman's testimony supported FHB's contention that the changes in the plans and specifications made by the Harrisons and their decorator had caused delays in FHB's performance of the work and cited the following testimony by Coffman:

However, Coffman testified that the concrete poured by FHB's subcontractor was defective because it had cracks that extended below the surface and because some of its surface sloped away from the drains that had been installed in the concrete. Coffman further testified that, due to those defects, all the concrete poured by FHB's subcontractor had to be torn out and replaced. Coffman also testified that the cracks in the concrete could have resulted from a failure to compact the soil before the concrete was poured, which would be a violation of the International Residential Building Code; however, he did not know whether FHB's subcontractor had failed to compact the soil.

In addition, Coffman testified that FHB's subcontractor had not framed a bathroom correctly, which was a violation of the International Residential Building Code, and that he had to redo that framing. He testified that FHB's subcontractor had failed to use treated wood around the recessed tub in the bathroom and that he had to replace it with treated wood. He testified that FHB's subcontractor had failed to seal the windows in the bathroom correctly and that, as a result, water was coming in around the window frame. He testified that he had to remove the windows, redo the sealing, and then put the windows back in.

Coffman also testified that the framing for a room that was being added in another part of the house had to be taken down and redone because the supporting "I joists" were cut, which deprived them of structural integrity.

The Harrisons moved to strike FHB's supplemental brief in support of its summary-judgment motion. On February 8, 2011, the trial court entered an order denying the Harrisons' motion to strike FHB's supplemental brief and granting FHB's summary-judgment motion.1 On March 4, 2011, the Harrisons appealed to the supreme court, which transferred the appeal to this court pursuant to § 12-2-7(6), Ala.Code 1975.

Standard of Review

Potter v. First Real Estate Co., 844 So.2d 540, 545 (Ala.2002).

Analysis

A. The fraud claim

The Harrisons have not raised an issue regarding the propriety of the trial court's granting FHB's partial-summary-judgment motion with respect to the Harrisons' fraud claim and have not argued that the trial court erred in granting that motion. "`An appeals court will consider only those issues properly delineated as such, and no matter will be considered on appeal unless presented and argued in brief. Ex parte Riley, 464 So.2d 92 (Ala. 1985).'" Tucker v. Cullman-Jefferson Cntys. Gas Dist., 864 So.2d 317, 319 (Ala. 2003) (quoting Braxton v. Stewart, 539 So.2d 284, 286 (Ala.Civ.App.1988)) (emphasis omitted). Accordingly, we affirm the partial summary judgment with respect to the Harrisons' fraud claim.

B. The breach-of-contract claim

The Harrisons argue that the trial court erred in granting the summary-judgment motion with respect to their breach-of-contract claim insofar as that claim is based on (1) the allegation that FHB failed to perform the work in accordance with the plans and specifications provided by the Harrisons, (2) the allegation that FHB failed to perform the work in a workmanlike manner, and (3) the allegation that FHB failed to complete the work.

"`[N]ot every partial failure to comply with the terms of a contract by one party ... will entitle the other party to abandon the contract at once.'" Birmingham News Co. v. Fitzgerald, 222 Ala. 386, 388, 133 So. 31, 32 (1931) (quoting 6 R.C.L. p. 926). In the case now before us, in order for the Harrisons to establish that they had the right to unilaterally terminate the contract on May 4, 2007, they bore the burden of proving that FHB had committed a breach of the contract that was "`of so material and substantial a nature as would constitute a defense to an action brought by [FHB] for [the Harrisons'] refusal to proceed with the contract.'" Id. (quoting 3 Williston on Contracts § 1467). "Whether or not a given breach is so material or essential may be frequently a question of fact to be determined by the jury, yet if in a particular case the question is so clear as to be decided only in one way, it is a question of law for the court." Id.

In order for FHB's breach of the contract to constitute a defense to an action brought by FHB based on the Harrisons' refusal to proceed with the contract, the breach must be sufficient to establish that FHB had not rendered substantial performance of the contract. See John D. Calamari & Joseph M. Perillo The Law of Contracts § 11.18(b) (4th ed. 1998) ("Substantial performance is the antithesis of material breach. If a breach is material, it follows that substantial performance has not been rendered."). "Substantial performance of a contract does not contemplate exact performance of every detail but performance of all important parts." Mac Pon Co. v. Vinsant Painting & Decorating Co., 423 So.2d 216, 218 (Ala. 1982).

The Harrisons' answer to FHB's interrogatory number 4, the testimony regarding defects in the concrete contained in Coffman's affidavit, and the testimony regarding defects in the concrete and the framing contained in Coffman's deposition testimony constituted substantial evidence tending to prove that FHB had failed to perform some of its work in a workmanlike manner. See Potter v. First Real Estate Co., 844 So.2d at 545 ("`"Substantial evidence" is "evidence of such weight and quality that fair-minded persons in the exercise of impartial judgment can reasonably infer the existence of the fact sought to be proved."'"). We conclude that the question whether that evidence indicates that FHB committed a material breach of the contract that entitled the Harrisons to terminate the contract unilaterally is a question of fact to be determined by a jury. See Birmingham News Co. v. Fitzgerald, 222 Ala. at 388, 133 So. at 32 ("Whether or not a given breach is so material or essential may be frequently a question of fact to be determined by the jury...."). Therefore, we reverse the summary judgment with respect to the breach-of-contract claim insofar as that claim is based on the allegation that FHB failed to perform the work in a workmanlike manner.

Insofar as their breach-of-contract claim is based on the allegation that FHB failed to perform the work in accordance with the plans and specifications, the Harrisons argue that the trial court erred in granting the summary-judgment motion because, they say, (1) Madelyn Hereford, their decorator, testified that FHB installed plumbing pipes and electrical wiring in the wall to the left of a sliding pocket door instead of to the right as specified by the plans, which required that those pipes and wires be torn out and reinstalled, and (2) Gary Harrison testified in his affidavit that "Mr. Gean did not follow the drawings, plans and directions of Madelyn Hereford, our interior decorator, and Robert Weber, our architect...." That testimony of Gary Harrison is a mere conclusory statement that, "`cannot be considered in ruling upon a summary[-]judgment motion.'" B.M. v. Crosby, 581 So.2d 842, 843 (Ala.1991) (quoting trial court's order). Hereford's testimony tended to prove one instance of FHB's failure to follow the plans and specifications. However, in order for that one instance of FHB's failure to follow the plans and specifications to constitute a material breach of the contract, it would have to be sufficient to establish that FHB had failed to render substantial performance of the contract. See Birmingham News Co. v. Fitzgerald, 222 Ala. at 388, 133 So. at 32; and Calamari & Perillo The Law of Contracts § 11.18(b). We conclude that that one instance alone is not sufficient to establish that FHB failed to render substantial performance of the contract. See Mac Pon Co. v. Vinsant Painting & Decorating Co., 423 So.2d at 218 ("Substantial performance of a contract does not contemplate exact performance of every detail but performance of all important parts."); and Birmingham News Co. v. Fitzgerald, 222 Ala. at 388, 133 So. at 32 ("Whether or not a given breach is so material or essential may be frequently a question of fact to be determined by the jury, yet if in a particular case the question is so clear as to be decided only in one way, it is a question of law for the court."). Therefore, we affirm the summary judgment with respect to the breach-of-contract claim insofar as that claim is based on the allegation that FHB failed to follow the plans and specifications.

Insofar as their breach-of-contract claim is based on the allegation that FHB failed to complete the work, the Harrisons argue that the trial court erred in granting the summary-judgment motion because, they say, (1) Gean testified that, before the contract was signed, he had estimated that it would take three to four months to complete the work; (2) Gary Harrison testified that FHB could have completed the work by mid-April 2007 if it had performed the work properly; and (3) Hereford testified as follows:

We cannot consider Gean's estimate that it would take three to four months to perform the contract because the contract expressly provided that all representations made before the signing of the contract were merged into the contract. In Ex parte Palm Harbor Homes, Inc., 798 So.2d 656, 660-61 (Ala.2001), the supreme court explained:

In the case now before us, the Harrisons have not argued that an exception to the merger doctrine applies to Gean's estimate. Consequently, the merger clause in the contract precludes us from considering the estimate. See Ex parte Palm Harbor Homes, Inc.

Because the contract neither specified a date for completion of the work nor stated that time was of the essence, FHB was entitled to a reasonable time to perform the contract. See Lemon v. Golf Terrace Owners Ass'n, 611 So.2d 263, 265 (Ala.1992) ("[W]here a contractual obligation to perform exists, and no time is prescribed in the contract for performance, the law requires the obligated party to perform within a `reasonable time.'"). Although Coffman, who testified as an expert witness on behalf of the Harrisons, testified in his deposition that it would take a minimum of a year to perform the work, the Harrisons submitted sufficient evidence to establish a genuine issue of material fact regarding whether the Harrisons afforded FHB a reasonable time to perform the work before terminating the contract on May 4, 2007. Id. ("What is a reasonable time depends on the nature of the act to be done and all of the circumstances relating to that act. This, necessarily, is a question to be determined by the trier of fact."). Moreover, we conclude that, if a jury should find that the Harrisons afforded FHB a reasonable time to complete the work, it would also be a jury question whether FHB's failure to complete the work by May 4, 2007, constituted a material breach of the contract that would entitle the Harrisons to terminate the contract unilaterally. Birmingham News Co. v. Fitzgerald, 222 Ala. at 388, 133 So. at 32. Therefore, we reverse the summary judgment with respect to the breach-of-contract claim insofar as that claim is based on the allegation that FHB failed to complete the work.

The Harrisons have not challenged the summary judgment with respect to the breach-of-contract claim insofar as that claim is based on any other allegations. "When an appellant fails to argue an issue in its brief, that issue is waived." Boshell v. Keith, 418 So.2d 89, 92 (Ala.1982). Therefore, we affirm the summary judgment with respect to the breach-of-contract claim insofar as that claim is based on any allegation other than the allegations that FHB breached the contract by failing to perform the work in a workmanlike manner and by failing to complete the work.

C. The negligence claim

The Harrisons challenge the summary judgment with respect to the negligence claim insofar as that claim is based on the allegations that FHB failed to supervise the performance of the work in a proper manner, failed to perform the work in a workmanlike manner, and failed to perform the work in accordance with the plans and specifications. The same evidence that we held constituted substantial evidence indicating the FHB had not performed some of its work in a workmanlike manner for purposes of the breach-of-contract claim also constitutes substantial evidence indicating that FHB failed to perform some of its work in a workmanlike manner for purposes of the negligence claim. Accordingly, based on that evidence, we reverse the summary judgment with respect to the negligence claim insofar as it is based on the allegation that FHB failed to perform some of its work in a workmanlike manner. See Potter v. First Real Estate Co., 844 So.2d at 545.

Moreover, Hereford's testimony that FHB installed the pipes and wires to the left of the pocket door instead of to the right of it as required by the plans and specifications constitutes substantial evidence tending to prove that FHB failed to perform the work in accordance with the plans and specifications. Id. For purposes of the breach-of-contract claim, it was necessary that the Harrisons establish that FHB's failure to perform the work in accordance with the plans and specifications constituted a material breach of the contract, and we are affirming the summary judgment with respect to the breach of contract claim insofar as it is based on the allegation that FHB failed to perform the work in accordance with the plans and specifications because we have concluded that the single instance of FHB's failure to perform the work in accordance with the plans and specifications attested to by Hereford did not establish that it constituted a material breach of the contract. However, for purposes of the negligence claim, the Harrisons are not required to prove that FHB's failure to perform the work in accordance with the plans and specifications constituted a material breach of the contract. Accordingly, based on Hereford's testimony that FHB installed the pipes and wires to the left of the pocket door instead of to the right of it as required by the plans and specifications, we reverse the summary judgment with respect to the negligence claim insofar as it is based on the allegation that FHB failed to perform the work in accordance with the plans and specifications.

With respect to the allegation that FHB failed to supervise the performance of the work in a proper manner, Gary Harrison testified in his affidavit that Gean failed to come to the job site on a regular basis, failed to order materials in a timely manner, and failed to schedule and coordinate the work of subcontractors in a proper manner. In addition, Gary Harrison described two examples of Gean's failure to coordinate the work of subcontractors in a proper manner. Gary Harrison also testified that Gean had ordered materials that were not suitable for the work, which had to be replaced. That testimony constituted substantial evidence indicating that FHB had not supervised the performance of the work in a proper manner. See Potter v. First Real Estate Co., 844 So.2d at 545. Accordingly, we reverse the summary judgment with respect to the negligence claim insofar as it is based on the allegation that FHB failed to supervise the performance of the work in a proper manner.

The Harrisons have not challenged the summary judgment with respect to the negligence claim insofar as that claim is based on any other allegations. "When an appellant fails to argue an issue in its brief, that issue is waived." Boshell v. Keith, 418 So.2d at 92. Accordingly, we affirm the summary judgment with respect to the negligence claim insofar as that claim is based on any allegations other than the allegations that FHB failed to perform the work in a workmanlike manner, failed to perform the work in accordance with the plans and specifications, and failed to supervise the performance of the work in a proper manner.

D. The negligent-supervision claim

The Harrisons first argue that the trial court erred in granting the summary-judgment motion with respect to the negligent-supervision claim because, they say, FHB's narrative statement of undisputed fact "fails to include a factual statement pertaining to the issue of [FHB's] negligent employment, supervision, and/ or retention of the services of Kyle Gean." Harrison's brief, at p. 39. However, FHB asserted that it was entitled to a summary judgment with respect to the negligent-supervision claim on the ground that the Harrisons had not produced substantial evidence indicating that Gean was incompetent. "When the basis of a summary-judgment motion is a failure of the nonmovant's evidence, the movant's burden... is limited to informing the court of the basis of its motion—that is, the moving party must indicate where the nonmoving party's case suffers an evidentiary failure." Rector v. Better Houses, Inc., 820 So.2d 75, 80 (Ala.2001). The Harrisons have cited no legal authority standing for the proposition that, when the basis of a summary-judgment motion is a failure of the nonmovant's evidence, the movant must include in his or her narrative statement of undisputed facts a factual statement regarding the failure of that evidence.

State Farm Mut. Auto. Ins. Co. v. Motley, 909 So.2d 806, 822 (Ala.2005). Because the Harrisons have not cited any legal authority supporting their first argument regarding the negligent-supervision claim, we decline to consider that argument. Id.

The Harrisons also argue that the trial court erred in granting the summary-judgment motion with respect to their negligent-supervision claim because, they say, the trial court had before it evidence indicating that Gean had never supervised a job as large as the work to be performed on the Harrisons' house, that the principals of FHB seldom came to the job site to check on the performance of the work and voiced no concerns about the quality of the work to Gean despite the Harrisons' complaining to them, that Gean failed to supervise the performance of the work in a proper manner, and that the work was not performed in a workmanlike manner. However, the Harrisons have not supported this argument with any legal authority. Therefore, we decline to consider it. Id. Accordingly, we affirm the summary judgment with respect to the negligent-supervision claim.

Conclusion

In summary, we reverse the summary judgment with respect to the breach-of-contract claim insofar as it is based on the allegations that FHB failed to perform the work in a workmanlike manner and that FHB failed to complete the contract within a reasonable time; we reverse the summary judgment with respect to the negligence claim insofar as it is based on the allegations that FHB failed to perform the work in a workmanlike manner, failed to perform the work in accordance with the plans and specifications, and failed to supervise the performance of the work in a proper manner; we affirm the judgment of the trial court in all other respects; and we remand the cause for further proceedings consistent with this opinion.

AFFIRMED IN PART; REVERSED IN PART; AND REMANDED.

THOMPSON, P.J., and PITTMAN and MOORE, JJ., concur.

THOMAS, J., concurs in the result, without writing.