Insurance — Homeowners — Water damage — Trial court did not err in entering final summary judgment in favor of insurer in action filed by insureds after coverage was denied on ground that damage from leak in roof was created by normal wear and tear, an uncovered risk, rather than by a windstorm event — Affidavits submitted by insurer in support of its motion for summary judgment were sufficient to meet its burden, and opposing affidavit by expert who conducted inspection a year after the damaged roof was repaired failed to identify admissible evidence that created genuine issue of material fact