Put Shingles Over Old Roof

If you need to redo your roof you might be tempted to save some money by having another layer installed over the existing shingles.

Put shingles over old roof.

Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in. Hope you like it. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. We don t recommend them nor do we do them.

Leave the old valley flashing in place and install new over it. Why not add new roof shingles over old. They don t do a good job of bridging over gaps dips or humps including the. How to do it remove caps.

Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of. As long as it s done right and under the right conditions installing new shingles over old ones can last as long and look just as good as a complete re roof. Doing it now will make it easier to keep the reroofing job clean. Roofing over your existing roof is not worth it.

Install a layer of roofing felt over the roof before you begin installing the new shingles. If a shingle is. Step 3 cover the old shingles. In this video we provide details on how to install roof shingles over existing shingles.

Use 1 5 or 1 75 inch roofing nails. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. We discuss the nesting method which helps minimize an uneven appear. If you haven t noticed yet we are not fans of shingle overs not at all.

Shingles are designed for flat surfaces. Looks just as good and lasts as long. Over the years we ve seen problems caused by shingle overs. Damaged decking will need to be repaired before you can install any new shingles.

Use a flat pry bar. Remove the ridge caps. Does it cost more to tear off. Manufacturers will still warranty the roof for the same amount of time as a re roof as long as it s done by a qualified installer.

Place the top of each starter shingle firmly against the bottom of the shingle immediately above it and even with the eaves then nail it into place. Here is a video on how we lay a second layer of asphalt shingles over existing asphalt shingles. Damaged shingles should be removed to check the decking for problems. Installing a new roof over shingles takes less time than tearing off the old roof.