Underlayment For Low Slope Metal Roof

Install the roofing panels and seal between the pipe and panel with a caulking rated for use on metal roofs.

Underlayment for low slope metal roof.

It provides trapped moisture from under the roof in low slope applications a path to drain. Third underlayment layer there is a third product that is sometimes used and specified in new construction. Roll self adhered roofing underlayment 225 sq. Gcp applied technologies grace ice and water shield 36 in.

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

Dry fit the roof boot and mark the location of the top of the gasket on the pipe. Ft coverage sbs modified asphalt polyester self adhered low slope roofing roll in black model lb323235. The traditional and most common material used for roof underlayment on a steep slope metal roof is non perforated asphalt impregnated felt underlayment. It is akin to cedar breather.

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. 30 which are reflective of a once used pound per square weight designation. There are several types of felt underlayment including both organic reinforced and inorganic reinforced.

With slopes from 2 12 to 4 12 use a double layer of no. Ft model 5003002.