New Roof Over Existing Roof

When roofing over your existing shingles can be a good idea.

New roof over existing roof.

I have finally confirmed that it s allowed in ontario provided the plan passes the building inspector. Your house will probably be worth less. Another reason is curling shingles as you can only install a new layer if the first one is completely flat and level. Let s start with the good.

How to install a roof over an existing roof determine the feasibility. Use premade roof trusses premade roofing trusses will be easier and take less time than installing a stick built roof. The roof should be in sound. The method of installation varies wildly.

When you should tear off your roof and start from scratch instead. Multiple layers of shingles can make it difficult or impossible for the nails to penetrate. Once your roof is back in tip top condition you can start looking at the various roof over options. Premade trusses will form the skeleton of your new roof above your old roof.

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. We do not want to remove the existing roof so we are proposing to build directly over the old roof. We are doing all the work ourselves so tearing off the old roof would be a real problem. If your existing roof is fairly old there s a good chance the shingles are damaged.

That s also why building codes commonly limit re roofing to no more than two layers. Shingles that are raised or misshapen make it hard to lay a smooth flat layer of new shingles on top. A layer of old deteriorating shingles can make your new roof look bad. Inspect the condition of your current roof.

Why installing new shingles over old shingles can be good. The cheapest option would be to leave the old roof in place and place the new rafters over the existing roof. The most important part of any roof over is to first come to terms with the state of your roof. The condition of the existing roof is critical.

It is not possible to mix materials nor to install a new layer over slate or wood tiles. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because. 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. The new roof will be a metal roof.