Roll Roofing Part 2 of 2

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Roll roofing is a quick and easy roofing product to install. The material is simply rolled across the roof, nailed along the edges, and sealed with roofing cement. It’s geared for roofs with slight slopes, such as porches and garages.

 

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Overview

Roll roofing is a quick and easy roofing product to install. The material is simply rolled across the roof, nailed along the edges, and sealed with roofing cement. It’s geared for roofs with slight slopes, such as porches and garages.
Some manufacturers recommend using a roof primer prior to installing the roofing. Read and follow manufacturer’s directions. Your roof decking must be completely clean before the roll roofing can be applied. Any debris, even a small twig or leaf, can end up showing through the roofing.
Store the roofing in a warm, dry location until you’re ready to start the project, and choose a warm day for the installation. Roll roofing is best installed in temperatures above 45°F. If applied in cold weather, the material can crack.
The following pages show the three methods for installing roll roofing. The perimeter bond application is the fastest installation method and can be used on sloped roofs. The concealed nail application 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. The double coverage method is used for roofs that are almost completely flat. The double coverage, using fully bonded selvedge roofing, offers better protection against water infiltration.
Roll roofing is used on roofs that have a slight slope. Installation is fast and straightforward, with the material rolled over a clean roof decking.

What You'll Need

Tools:

Utility knife
Tape measure
Chalk line
Serrated trowel
Straightedge
Hammer
Roll roofing
Galvanized roofing nails
Asphalt-based roofing cement

Materials:

Utility knife
Tape measure
Chalk line
Serrated trowel
Straightedge
Hammer
Roll roofing
Galvanized roofing nails
Asphalt-based roofing cement

 

Step 1

How to Install Roll Roofing (Concealed Nail Application)

Set the next course in place so it overlaps the first row by 4". Nail along the top edge. Lift the side and bottom edges, apply cement, then press together to seal. Repeat this process for the remainder of the roof.


Step 2

How to Install Roll Roofing (Double Coverage Application)

Cut away the granular part of the roofing to create a starter strip. Align the strip with the eaves, and drive nails along the top and bottom edge at 12" intervals. Place the first full course flush with the eaves. Nail the nongranule edges every 12". Roll back the bottom of the roofing and apply roofing cement along the eaves and rake edges on the starter strips. Set the roofing back in place, pressing it into the cement.


Step 3

How to Install Roll Roofing (Double Coverage Application)

Align the bottom edge of the second course with the top of the granule edge of the first row. Nail every 12" along the nongranule edges. Flip the bottom part back, apply cement along the sides and bottom of the nongranule area of the first course, then set the strip back in place. Install remaining courses the same way.


 
 

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