A self-adhering, rubberized underlayment will be installed on the pitch-change area on the roof of the Palo Cedro Village Shopping Center in Palo Cedro, Calif., to stop leaks during heavy rains. The original wood shakes were replaced by composition shingles installed according to manufacturer's directions. The shingles are designed to seal to help withstand high winds, but in some cases, this means they can trap water, said Joe Van Sweden, owner of Ark Design Construction & Roofing, which did the work on the facility. The shingle supplier, who determined the solution to the leaks, will honor its warranty and shoulder the costs, Van Sweden said.

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