Underlayment For Low Slope Metal Roof

15 felt underlayment as shown in figure 2 3above.

Underlayment for low slope metal roof.

Apply a suitable sealant to the underside of the flange of the roof boot and a ring of sealant around the pipe at the height you marked. Gcp applied technologies grace ice and water shield 36 in. Third underlayment layer there is a third product that is sometimes used and specified in new construction. They commonly are designated as type 15 and type 30 or referred to as no.

It is akin to cedar breather. Dry fit the roof boot and mark the location of the top of the gasket on the pipe. Underlayment is important for a metal roof you get night time condensation on the underside of the panels you don t want that to get into your deck. The traditional and most common material used for roof underlayment on a steep slope metal roof is non perforated asphalt impregnated felt underlayment.

Install the roofing panels and seal between the pipe and panel with a caulking rated for use on metal roofs. 15 underlayment as shown. With slopes from 2 12 to 4 12 use a double layer of no. For low slope roofs in cold climates where ice dams and ice dam leaks are likely bliss recommends a double layer of no.

There are several types of felt underlayment including both organic reinforced and inorganic reinforced. It provides trapped moisture from under the roof in low slope applications a path to drain. Asphalt saturated nonperforated organic felts are among the most common underlayments used for metal roof systems. That product is a mesh that would go on top of and over the other underlayment used.

Roll self adhered roofing underlayment 225 sq. Ft model 5003002.