Nail Down Roof Felt And Roll Roofing On Rafters

For a slightly sloped roof use the concealed nail method shown.

Nail down roof felt and roll roofing on rafters.

The black rolls of roof paper or felt are made with asphalt and are normally available in rolls. In most cases this will leave 400 square feet 37 m 2 of net coverage per 1 roll. Nail it down exactly as you did the 18 inch roofing. An underlayment of felt roofing is optional.

The felt provides a layer of additional weather protection between the roofing finishing material shingles tiles and the roof decking. 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. Roll roofing is inexpensive and easy to apply. Roofing felt is comprised of a base made from natural materials such as wood cellulose or synthetic ones such as fiberglass or polyester and then coated or saturated with a protective coating such as bitumen asphalt which repels water but still allows the product to breathe.

Some roofing felts are actually glued down. A typical roof has three layers a felt layer and two layers of overlapping shingles. The most common size width for rolls of roofing paper is 36 inches. Again trim any roofing that extends beyond the edge of the roof.

Place a sheet of 36 inch roll roofing directly over the 18 inch roofing that is covering the valley. Roofing nail should have a barbed shank until the head which eliminates nail pops blow offs and roof leaks. A roofing nail should have a minimum nominal shank diameter of 12 gauge 2 67 mm and a minimum head diameter of 9 5 mm. Working with a helper expect to spend half a day installing flashings and roll roofing for a 700 square foot roof with modest complications.

One roll of conventional 15 felt covers 432 square feet 40 1 m 2. What is roofing paper or felt. You will need 1 10 gallon of lap not mastic cement for every roll and 2 pounds of roofing nails for every square. A large nail head and heavier shank gauge provide greater holding power.

Convert the area from inches to feet prior to purchasing your felt. Purchase enough felt to cover your roof s area. How to install roll roofing on low slope roofs. Nail metal drip edge flashing which bends over the roof and down the edge of the facing board on all roof edges.

These applications are ideal for flat roofs or protective surfaces under roof level decks. Roll roofing is different. Installing the roofing felt does take care but can go very quickly. It has just one layer so it goes.

However you must allow for overlaps on joints.