New Roof 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.

New roof shingles over old.

Find a pre screened local roofing contractor. Since the roofer is able to identify and repair high risk areas a new roof offers better quality than an old one. A new roof fixes existing issues and traps less heat than multiple layers which can cause shingles to break and curl faster. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below.

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. Shingles are designed for flat surfaces. In this video we provide details on how to install roof shingles over existing shingles. Use a flat pry bar.

Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. Install a layer of roofing felt over the roof before you begin installing the new shingles. Is it okay to put the new shingles right over the old ones. How to do it remove caps.

The felt should be secured every six inches with nails or staples. If a shingle is. Step 3 cover the old shingles. Remove the ridge caps.

Damaged decking will need to be repaired before you can install any new shingles. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of. We discuss the nesting method which helps minimize an uneven appear. 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. They don t do a good job of bridging over gaps dips or humps including the. If you need to redo your roof you might be tempted to save some money by having another layer installed over the existing shingles. Why not add new roof shingles over old.

But if the current. Damaged shingles should be removed to check the decking for problems. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Leave the old valley flashing in place and install new over it.