Re Roofing A House Over Old Shingles

Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture.

Re roofing a house over old shingles.

Most building codes allow for two layers of asphalt shingles on a house so stripping off everything down to the plywood sheathing may not be your only choice. Investigate strip shingles entirely and replace roof sheathing as needed. That s also why building codes commonly limit re roofing to no more than two layers. The quick answer is yes you can re roof architectural shingles over existing architectural shingles however you must check with the shingle manufacturer as well.

Damaged decking will need to be repaired before you can install any new shingles. Install a layer of roofing felt over the roof before you begin installing the new shingles. The felt should be secured every six inches with nails or staples. Damaged shingles should be removed to check the decking for problems.

All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. It can only be done once so if you already have two layers of roofing in place reroofing is not an option for you. We discuss the nesting method which helps minimize an uneven appear. Step 3 cover the old shingles.

How to do it remove caps. Doing it now will make it easier to keep the reroofing job clean. 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. Reroofing is the process of layering one set of new shingles over a set of existing shingles.

Watch for damaged or un sound roof decking. Use a flat pry bar. Remove the ridge caps. Nailing new shingles over existing ones is less expensive and faster requiring less labor but it also means you lose the chance to assess the sheathing for signs of water damage.

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. Construction of a new roof deck for asphalt fiberglass roofing if you re going to add a roof on top of an old one it s a good idea to remove any loose shingles and apply a new layer of 30 pound roofing felt before laying the new shingles. Find a pre screened local roofing contractor. In this video we provide details on how to install roof shingles over existing shingles.

If a shingle is.