New Roof Over Existing Roof

Shingles that are raised or misshapen make it hard to lay a smooth flat layer of new shingles on top.

New roof over existing 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. We are doing all the work ourselves so tearing off the old roof would be a real problem. You can save money because there s no dump fee for removing your old roofing and there s no need for additional felt paper over the old roof. Once your roof is back in tip top condition you can start looking at the various roof over options.

Why installing new shingles over old shingles can be good. That s also why building codes commonly limit re roofing to no more than two layers. Inspect the condition of your current roof. A layer of old deteriorating shingles can make your new roof look bad.

Multiple layers of shingles can make it difficult or impossible for the nails to penetrate. The roof should be in sound. If your existing roof is fairly old there s a good chance the shingles are damaged. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because.

Installing a new roof over an existing one can only be done if you have shingles because you can only put shingles over shingles. Let s start with the good. It is not possible to mix materials nor to install a new layer over slate or wood tiles. The method of installation varies wildly.

Another reason is curling shingles as you can only install a new layer if the first one is completely flat and level. Use the guide we. When you should tear off your roof and start from scratch instead. The cheapest option would be to leave the old roof in place and place the new rafters over the existing roof.

Use premade roof trusses premade roofing trusses will be easier and take less time than installing a stick built roof. The most important part of any roof over is to first come to terms with the state of your roof. Premade trusses will form the skeleton of your new roof above your old roof. The condition of the existing roof is critical.

When roofing over your existing shingles can be a good idea. What you need power nailer or roofing hatchet tape measure roofing shovel or flat pry bar hammer drill carpenter s square straight cut tin snips utility knife chalkline broom. The new roof will be a metal roof. How to install a roof over an existing roof determine the feasibility.