Roofing Shingles Over Old

To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below.

Roofing shingles over old.

Asphalt over asphalt is not advisable. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Use a flat pry bar. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture.

The felt should be secured every six inches with nails or staples. 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. If a shingle is. How to do it remove caps.

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. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of. This means the total roof weight was probably greater when the previous layer of shingles was installed than the new metal roofing. Remove the ridge caps.

Step 3 cover the old shingles. But if the current. Damaged decking will need to be repaired before you can install any new shingles. Current shingles are curling or in bad shape the new shingle roof should lay flat on your old one.

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. Shingles are designed for flat surfaces. They don t do a good job of bridging over gaps dips or humps including the. 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. Leave the old valley flashing in place and install new over it. 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. Roofing second layer of shingles roofing.