For extra durability you may install roll roofing in two layers.
Laying rolled roofing.
If the roof is sloped you can use the exposed nail method.
The strips should always be horizontal.
When it s positioned properly nail the roofing down with galvanized roofing nails every four inches along the top and bottom edges.
To install roll roofing you ll need to cut the material into long strips of the correct length for your roof and lay it flat.
The first layer should cover the roof as far as the chalk line.
As you place the rolled roofing down stretch it to get rid of wrinkles and creasing.
For a slightly sloped roof use the concealed nail method shown.
Prepare the roofing roll roofing is not very pliant or flexible in cold weather of fewer than 45 degrees fahrenheit and it can crack and break if it is manipulated while cold.
It also helps if you first install a layer of roofing felt.
Unroll the roofing and cut a strip to the length necessary for your roof.
Place the second row of roofing so the top edge.
Applying roofing felt first will better protect the sheathing against condensation as well as against leaking.
Push the rolled roofing down into the wet cement to secure it to the roof.
It is best to apply these strips horizontally.
If it does have to be installed in cold weather cut it into 12 to 18 foot sheets and lay them flat inside a garage to warm up and flatten out.
Apply a 2 inch wide layer of roofing cement across the top of the first row of roofing.
Place the first strip over the starter strips but don t overlap the roof edge.
For laying the material in the corners internal and external it must be cut as a larger sheet and then to be stuck overlapped.
Roll roofing is often installed over bare wood sheathing or sheathing that has been painted with a primer.