Roofing Shingles Over Old

One important thing to remember when you re deciding what type of roof to buy is that new asphalt shingles shouldn t be placed on top of old asphalt shingles.

Roofing shingles over old.

Shingles are designed for flat surfaces. Roofing second layer of shingles roofing. 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. How to do it remove caps.

Doing it now will make it easier to keep the reroofing job clean. Install a layer of roofing felt over the roof before you begin installing the new shingles. Damaged shingles should be removed to check the decking for problems. This means the total roof weight was probably greater when the previous layer of shingles was installed than the new metal roofing.

Why not add new roof shingles over old. Current shingles are curling or in bad shape the new shingle roof should lay flat on your old one. Remove the ridge caps. Use a flat pry bar.

Damaged decking will need to be repaired before you can install any new shingles. If a shingle is. Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in. Step 3 cover the old shingles.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. When tearing off the old roof is a better option there are already two layers of shingles on your roof most building codes only allow two layers of any type of roofing. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of. They don t do a good job of bridging over gaps dips or humps including the.

Asphalt over asphalt is not advisable. 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. Leave the old valley flashing in place and install new over it. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below.