House Wrap Under Metal Roof

Each layer is composed of polyethylene bubbles that function as an additional thermal barrier that helps stop condensation.

House wrap under metal roof.

House wrap is a weatherization membrane which provides a protective layer under a building s siding and over the wall girts or sheathing. There are several types of felt underlayment including both organic reinforced and inorganic reinforced. Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes. The traditional and most common material used for roof underlayment on a steep slope metal roof is non perforated asphalt impregnated felt underlayment.

Underlayment must also act as a secondary weather barrier in case the roof fails. The spacing of your purlins depends on the expected snow and wind load. Traditionally metal roofs have used standard 30 pound felt paper underlayment. These categories are regular and what s known as high temp.

It is literally wrapped around a building cut out around windows and doors and taped at the seams. We recommend a polypropylene scrim reinforced underlayment made up of multiple layers. Bubble insulation a newer option we like from ecofoil is their double bubble wrap roll insulation for metal buildings. Make sure the product is designed to be used under metal.

House wrap behind a building s siding is an excellent secondary defense against the weather. This type of underlayment is critical to a quality roof installation. Once again this is used on cold roof construction. The short answer is probably not.

It serves as a moisture barrier as well as a slip sheet. The first goal of roofing underlayment is to keep the roof deck dry before installation of the metal roofing material.