May 2006

Focus on ventilation

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Roof ventilation issues can be resolved by meeting standards

by Dan Perkins
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Photos courtesy of Dan Perkins Construction Inc., Ishpeming, Mich.

The ridge vent and cap shown are designed to be installed before the roofing panels are installed. This has proved to be a watertight system that can be applied more efficiently and safely than ridge caps that are installed after panel installation.

As buildings have become tighter, a variety of issues related to roof ventilation—including ice damming, water condensation and mold within the building envelope—have tormented owners and contractors with increasing regularity. Many of these issues have manifested as costly court battles and insurance claims resulting in the general public's heightened awareness of these concerns and increased accountability in the contracting community.

Professional roofing contractors have a distinct role to play to ensure ventilation standards are...

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