Rolled Roofing Concealed Nail Method

Roofing nails with 3 8 or larger head.

Rolled roofing concealed nail method.

Rolled roofing material is often used on roofs that are low sloped. 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. 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. Applying roofing felt first will better protect the sheathing against condensation as well as against leaking.

Application of roll roofing in which all nails are covered by a cemented overlapping course. Each method can be used with full width mineral surface single coverage rolls or selvage edge double coverage rolls. 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. Roll roofing is often installed over bare wood sheathing or sheathing that has been painted with a primer.

In the concealed nail method roofers drive nails into the rolled roofing material and then cover the nails with cemented overlapping material. The nails should start 3 4 inch from the edges of the roofing and be 6 inches apart throughout the roofing s surface. Step 4 trim any roofing that extends beyond the edge of the roof. For a slightly sloped roof use the concealed nail method shown.

The exposed nail applica tion pages 87 to 88 is the fastest installation method and can be used on sloped roofs. If the roof is sloped you can use the exposed nail method. 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. Depending on roof slope you can apply rolled roofing using either an exposed or concealed nail method says u s.

Preparing to install rolled roofing prepare the roofing. 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. Double coverage roofs last much longer up to fifteen years or more. 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.