Roofing Shingles Over Old

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h.

Roofing shingles over old.

Use a flat pry bar. Damaged shingles should be removed to check the decking for problems. Roofing second layer of shingles roofing. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture.

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. 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. Current shingles are curling or in bad shape the new shingle roof should lay flat on your old one. Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in.

If a shingle is. Step 3 cover the old shingles. Why not add new roof shingles over old. But if the current.

Leave the old valley flashing in place and install new over it. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of. The felt should be secured every six inches with nails or staples. They don t do a good job of bridging over gaps dips or humps including the.

This means the total roof weight was probably greater when the previous layer of shingles was installed than the new metal roofing. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. Doing it now will make it easier to keep the reroofing job clean. 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.

Remove the ridge caps. How to do it remove caps. Install a layer of roofing felt over the roof before you begin installing the new shingles. Asphalt over asphalt is not advisable.