Install New Roof Shingles Over Old

Along the rakes install a new j channel drip edge which wraps around the old rake flashing and starter courses.

Install new roof shingles over old.

Although it is often necessary to remove old shingles it s great when you can avoid the added expense of a tear off. 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. Leave the old valley flashing in place and install new over it. Install a layer of roofing felt over the roof before you begin installing the new 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. Has the same manufacturer s warranty. 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.

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. 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. Damaged shingles should be removed to check the decking for problems. Finally i had time to put the video clips together.

A reliable roofer will always do a roof inspection. Step 3 cover the old shingles. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Installing a new roof over shingles takes less time than tearing off the old roof.

Looks just as good and lasts as long. Before you reshingle a roof read our step. 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. 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.

To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. Can you put new asphalt roof shingles right over old ones. The roof also consists of decking and underlayment. The felt should be secured every six inches with nails or staples.

Damaged decking will need to be repaired before you can install any new shingles. Does it make sense to install new shingles over old ones. This provides added protection against ice dams. Four years after installing my new shingles they re still nice.