The exposed nail applica tion pages 87 to 88 is the fastest installation method and can be used on sloped roofs.
Rolled roofing concealed 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.
If the roof is sloped you can use the exposed nail method.
Preparing to install rolled roofing prepare the roofing.
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.
Step 4 trim any roofing that extends beyond the edge of the roof.
For a slightly sloped roof use the concealed nail method shown.
Application of roll roofing in which all nails are covered by a cemented overlapping course.
Roofing nails with 3 8 or larger head.
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.
The nails should start 3 4 inch from the edges of the roofing and be 6 inches apart throughout the roofing s surface.
Each method can be used with full width mineral surface single coverage rolls or selvage edge double coverage rolls.
Double coverage roofs last much longer up to fifteen years or more.
Applying roofing felt first will better protect the sheathing against condensation as well as against leaking.
This leaves nails unexposed to the weather.
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.
In the concealed nail method roofers drive nails into the rolled roofing material and then cover the nails with cemented overlapping material.
Rolled roofing material is often used on roofs that are low sloped.
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.
This reduces the chances of wrinkles after the roofing is installed.
Roll roofing is often installed over bare wood sheathing or sheathing that has been painted with a primer.
