Install New Roof Shingles Over Old

If you install new roof shingles over old ones your roof might sag and lose integrity over time.

Install new roof shingles over old. 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. Please click show more below to know. Damaged shingles should be removed to check the decking for problems. 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.

Installing a new roof over shingles takes less time than tearing off the old 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. That s also why building codes commonly limit re roofing to no more than two layers.

Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Leave the old valley flashing in place and install new over it. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Does it make sense to install new shingles over old ones.

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. Can you put new asphalt roof shingles right over old ones. Four years after installing my new shingles they re still nice. Has the same manufacturer s warranty.

Damaged decking will need to be repaired before you can install any new shingles. 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. Finally i had time to put the video clips together. The roof also consists of decking and underlayment.

A reliable roofer will always do a roof inspection. Before you reshingle a roof read our step. This provides added protection against ice dams. As long as it s done right and under the right conditions installing new shingles over old ones can last as long and look just as good as a complete re roof.

In the right situation putting new shingles over old ones saves money and helps the environment. Step 3 cover the old shingles. The felt should be secured every six inches with nails or staples. Install a layer of roofing felt over the roof before you begin installing the new shingles.