New Roof Shingles Over Old

Is it okay to put the new shingles right over the old ones.

New roof 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. How to do it remove caps. Along the rakes install a new j channel drip edge which wraps around the old rake flashing and starter courses. 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.

Step 3 cover the old shingles. Find a pre screened local roofing contractor. A new roof fixes existing issues and traps less heat than multiple layers which can cause shingles to break and curl faster. Install a layer of roofing felt over the roof before you begin installing the new shingles.

But if the current. Current shingles are curling or in bad shape the new shingle roof should lay flat on your old one. When contemplating a new roof many people hope to simply do a shingle over and avoid the extra cost and mess of tearing off the existing roof and starting from scratch. They don t do a good job of bridging over gaps dips or humps including the.

Doing it now will make it easier to keep the reroofing job clean. Remove the ridge caps. We discuss the nesting method which helps minimize an uneven appear. If a shingle is.

If you need to redo your roof you might be tempted to save some money by having another layer installed over the existing shingles. In fact the only pro to a shingle over is it s cheaper and cleaner. Construction of a new roof deck for asphalt fiberglass roofing if you re going to add a roof on top of an old one it s a good idea to remove any loose shingles and apply a new layer of 30 pound roofing felt before laying the new shingles. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of.

Use a flat pry bar. Shingles are designed for flat surfaces. Since the roofer is able to identify and repair high risk areas a new roof offers better quality than an old one. Why not add new roof shingles over old.

Damaged shingles should be removed to check the decking for problems. Leave the old valley flashing in place and install new over it. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros.