Roofing Shingles Over Old

Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of.

Roofing shingles over old.

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. 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. Roofing second layer of shingles roofing. Doing it now will make it easier to keep the reroofing job clean.

Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in. 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. But if the current. The felt should be secured every six inches with nails or staples.

Remove the ridge caps. Shingles are designed for flat surfaces. How to do it remove caps. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h.

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

This means the total roof weight was probably greater when the previous layer of shingles was installed than the new metal roofing. Asphalt over asphalt is not advisable. Install a layer of roofing felt over the roof before you begin installing the new shingles. Use a flat pry bar.

If a shingle is. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. Why not add new roof shingles over old. Damaged shingles should be removed to check the decking for problems.