Roofing Companies in Portland
List of Portland based roofing contractors and suppliers offering installation, repairs and maintenance services.
New air testing rules require the elimination of drafts completely. A cold non-vented roof space using breather membranes can be up to 25% more energy efficient than the traditional vented roof space. This means that a cold non-vented roof is now an important design element. Forthcoming regulations will also insist that the thermal bridge, which occurs over the wall plate at eaves level, is addressed