Underlayment For Low Slope Metal Roof

It provides trapped moisture from under the roof in low slope applications a path to drain.

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. Ft coverage sbs modified asphalt polyester self adhered low slope roofing roll in black model lb323235. 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. There are several types of felt underlayment including both organic reinforced and inorganic reinforced.

15 underlayment as shown. 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. 15 felt underlayment as shown in figure 2 3above.

For low slope roofs in cold climates where ice dams and ice dam leaks are likely bliss recommends a double layer of no. It is akin to cedar breather. The traditional and most common material used for roof underlayment on a steep slope metal roof is non perforated asphalt impregnated felt underlayment. Gcp applied technologies grace ice and water shield 36 in.

Roll self adhered roofing underlayment 225 sq. Ft model 5003002. 30 which are reflective of a once used pound per square weight designation. Install the roofing panels and seal between the pipe and panel with a caulking rated for use on metal roofs.

With slopes from 2 12 to 4 12 use a double layer of no. Peel and stick is only needed for low slope or if your roof has a issues with ice dams 4a doesn t sound like a climate for that.