Install Roof Shingles Over Top Old Roof Shingles

Putting new asphalt roof shingles right over old ones.

Install roof shingles over top old roof shingles.

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. Damaged shingles should be removed to check the decking for problems. The two pieces should meet neatly at the corners. Install a layer of roofing felt over the roof before you begin installing the new shingles.

At the eave and the rake install u shape drip edge flashing made for reroof jobs. 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 felt should be secured every six inches with nails or staples. Install the eave piece first then the rake piece over it.

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. Can you put new asphalt roof shingles right over old ones. Step 3 cover the old shingles. Why installing new shingles over old shingles can be good.

When you should tear off your roof and start from scratch instead. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because. That s also why building codes commonly limit re roofing to no more than two layers. When roofing over your existing shingles can be a good idea.

Use 1 5 or 1 75 inch roofing nails. Let s start with the good.