Install New Roof Shingles Over Old

In the right situation putting new shingles over old ones saves money and helps the environment.

Install new roof shingles over old.

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. This provides added protection against ice dams. Can you put new asphalt roof shingles right 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.

Does it make sense to install new shingles over old ones. Installing a new roof over shingles takes less time than tearing off the old roof. Install a layer of roofing felt over the roof before you begin installing the new shingles. Although it is often necessary to remove old shingles it s great when you can avoid the added expense of a tear off.

Has the same manufacturer s warranty. Damaged decking will need to be repaired before you can install any new shingles. 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.

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. A reliable roofer will always do a roof inspection. Damaged shingles should be removed to check the decking for problems. Looks just as good and lasts as long.

Finally i had time to put the video clips together. 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. The felt should be secured every six inches with nails or staples. If you install new roof shingles over old ones your roof might sag and lose integrity over time.

Step 3 cover the old 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. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below.

Four years after installing my new shingles they re still nice. Please click show more below to know. Leave the old valley flashing in place and install new over it. Before you reshingle a roof read our step.