Roofing Shingles Over Old

Why not add new roof shingles over old. Shingles are designed for flat surfaces. 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.

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Roofing shingles over old.

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. They don t do a good job of bridging over gaps dips or humps including the. Use a flat pry bar. 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.

To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of. Damaged decking will need to be repaired before you can install any new shingles. Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in.

Doing it now will make it easier to keep the reroofing job clean. This means the total roof weight was probably greater when the previous layer of shingles was installed than the new metal roofing. How to do it remove caps. Current shingles are curling or in bad shape the new shingle roof should lay flat on your old one.

Roofing second layer of shingles roofing. The felt should be secured every six inches with nails or staples. Damaged shingles should be removed to check the decking for problems. If a shingle is.

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. 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. But if the current.

Remove the ridge caps. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. Asphalt over asphalt is not advisable. Step 3 cover the old shingles.

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