Roofing Shingles Over Old

But if the current.

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. 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 second layer of shingles roofing. Install a layer of roofing felt over the roof before you begin installing the new shingles.

Doing it now will make it easier to keep the reroofing job clean. How to do it remove caps. Use a flat pry bar. Step 3 cover the old shingles.

If a shingle is. Shingles are designed for flat surfaces. Asphalt over asphalt is not advisable. 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.

Damaged decking will need to be repaired before you can install any new shingles. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. The felt should be secured every six inches with nails or staples. Remove the ridge caps.

Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. Current shingles are curling or in bad shape the new shingle roof should lay flat on your old one. Leave the old valley flashing in place and install new over it. Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in.

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. They don t do a good job of bridging over gaps dips or humps including the. Why not add new roof shingles over old. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of.