Rolled Roofing Concealed Nail Method

Each method can be used with full width mineral surface single coverage rolls or selvage edge double coverage rolls.

Rolled roofing concealed nail method.

For a slightly sloped roof use the concealed nail method shown. If the roof is sloped you can use the exposed nail method. It can be used for roof slopes down to 2 in 12 with the exposed nail method or down to 1 in 12 with the concealed nail method. This reduces the chances of wrinkles after the roofing is installed.

Application of roll roofing in which all nails are covered by a cemented overlapping course. Cut the roll roofing into lengths long enough to cover one run across the shed roof or of 18 whichever fits your shed better and lay them out on a flat surface to smooth them out. The concealed nail application page 89 is best for roofs with a slighter pitch all the way down to a 1 in 12 slope because it prevents water from penetrating under the nail heads. Step 4 trim any roofing that extends beyond the edge of the roof.

Applying roofing felt first will better protect the sheathing against condensation as well as against leaking. Roll roofing is often installed over bare wood sheathing or sheathing that has been painted with a primer. Depending on roof slope you can apply rolled roofing using either an exposed or concealed nail method says u s. Double coverage roofs last much longer up to fifteen years or more.

If your roof pitch declines up to 1 inch vertically for every 12 inches horizontally 1 12 pitch it is a good candidate for rolled roofing as long as you use the concealed nail method of fastening. Concealed nail method a method of installing asphalt roll roofing material in which all nails or fasteners are driven into the underlying roofing and covered by an overlapping course. Nail down the 18 inch roll roofing sheet that it is covering the valley. That portion of the flashing attached to a vertical surface above the plane of the roof to prevent water from migrating behind the base flashing.

Roofing nails with 3 8 or larger head. Preparing to install rolled roofing prepare the roofing. The nails should start 3 4 inch from the edges of the roofing and be 6 inches apart throughout the roofing s surface. In the concealed nail method roofers drive nails into the rolled roofing material and then cover the nails with cemented overlapping material.