Re Roofing A House Over Old Shingles

Reroofing is the process of layering one set of new shingles over a set of existing shingles.

Re roofing a house over old shingles.

Step 3 cover the old shingles. If a shingle is. Because there is no tear off reroofing can go much faster and be much less expensive than a complete roof replacement. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture.

Install a layer of roofing felt over the roof before you begin installing the new shingles. Prep work for re roofing over asphalt shingles inspect the condition of the existing roof and roof deck for numer of roof layers soundness of roof decking smoothness. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. 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.

Investigate strip shingles entirely and replace roof sheathing as needed. Damaged shingles should be removed to check the decking for problems. Doing it now will make it easier to keep the reroofing job clean. It can only be done once so if you already have two layers of roofing in place reroofing is not an option for you.

That s also why building codes commonly limit re roofing to no more than two layers. How to do it remove caps. Use a flat pry bar. 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.

In this video we provide details on how to install roof shingles over existing shingles. Having said that it will be nearly impossible to get a good looking quality installation. 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. Remove the ridge caps.

The felt should be secured every six inches with nails or staples. We discuss the nesting method which helps minimize an uneven appear. 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. Watch for damaged or un sound roof decking.

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.