Install New Roof Shingles Over Old

This provides added protection against ice dams.

Install new roof shingles over old.

Damaged decking will need to be repaired before you can install any new shingles. The felt should be secured every six inches with nails or staples. Some roofers install a layer of waterproof shingle underlayment wsu over the existing shingles at the eave end as would be done for a roof laid on bare sheathing. That s also why building codes commonly limit re roofing to no more than two layers.

Layering shingles on top of one another also means you re not getting a good idea of what s going on underneath the top layer of your roof. Looks just as good and lasts as long. Along the rakes install a new j channel drip edge which wraps around the old rake flashing and starter courses. Manufacturers will still warranty the roof for the same amount of time as a re roof as long as it s done by a qualified installer.

To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. In the right situation putting new shingles over old ones saves money and helps the environment. Please click show more below to know. Does it make sense to install new shingles over old ones.

Has the same manufacturer s warranty. Installing a new roof over shingles takes less time than tearing off the old roof. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Can you put new asphalt roof shingles right over old ones.

The roof also consists of decking and underlayment. Step 3 cover the old shingles. Install a layer of roofing felt over the roof before you begin installing the new shingles. If you install new roof shingles over old ones your roof might sag and lose integrity over time.

Damaged shingles should be removed to check the decking for problems. 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. Finally i had time to put the video clips together. Four years after installing my new shingles they re still nice.

A reliable roofer will always do a roof inspection. Although it is often necessary to remove old shingles it s great when you can avoid the added expense of a tear off. If the old ones are flat and you fill in any missing tabs and you do no more that a total of two layers of shingles yes you can reshingle over old shingles. Before you reshingle a roof read our step.