Installing Roof Shingles Over Old Shingles

But you must take care to install shingles correctly so they lie flat.

Installing roof shingles over old shingles.

Around an inch should do. Installing roof shingles in 11 steps. If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. That s also why building codes commonly limit re roofing to no more than two layers.

Using the chalk line snap a line between the two marks to get a straight edge. To start installing shingles line up aluminum drip edge flush with the edge of the roof and make a pencil line at the. If you are looking to save time installing new shingles over old shingles is a possible roof replacement solution. Use 1 5 or 1 75 inch roofing nails.

You want to be sure that you will be installing the shingles over only one other layer though. 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. Each shingle will require around 4 nails underneath the tar line and about half an inch under where the next shingle will overlap. Four years after installing my new shingles they re still nice.

The first row of shingles should overhang the drip edge of the roof. Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. Installing a new roof over shingles takes less time than tearing off the old roof. Please click show more below to know.

Is it okay to put the new shingles right over the old ones. The third layer of shingles will be too heavy to be supported. 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. Done correctly a reroof job will look as good and last as long as a new roof for a lot less money and a lot less hassle.

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. But unless the sheathing is extensively damaged or the structure can t support the weight of another layer of roofing a better solution is to apply a new layer of shingles right over the old one. If you need to redo your roof you might be tempted to save some money by having another layer installed over the existing shingles.

Pull the drip edge down about a half inch from that line to. Looks just as good and lasts as long.