Roll Roofing Over Old Shingles

In some instances it s used as a base material underneath traditional shingles in commercial construction.

Roll roofing over old shingles. It is easier and quicker to manufacture than shingles since it is a single piece and as a result it is a good deal cheaper. This aluminum flashing protects the edges of the roof sheathing. I would use steel but which ever suits ya. Roll roofing generally has a life expectancy of anywhere from six to 10 years.

But you must take care to install shingles correctly so they lie flat. Prepare a valley between joined roofs by cutting a strip that is 18 inches wide and covers the entire length of the. Place the top of each starter shingle firmly against the bottom of the shingle immediately above it and even with the eaves then nail it into place. I would tarp the roof even if it had to go a winter then re roof in spring.

That s also why building codes commonly limit re roofing to no more than two layers. Install a drip edge around the perimeter of the roof. Use 1 5 or 1 75 inch roofing nails. Installing new roof shingles over old effectively doubles the weight of the roofing so you have to make sure your roof structure can handle the extra load.

A champaign roofing company can install it for a reasonable price if the homeowner does not wish to do it. I wouldn t roll roof over shingles no. Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. If the job is done correctly with the new layer of shingles laid flat over the existing shingles the old roof cushions the new one and serves as a secondary barrier should wind or water ever break through the new shingles.

Roll roofing generally is sold in a sheet 36 inches long and 60 to 90 feet wide. If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing.