How To Shingle A New Roof To An Existing Roof

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How to shingle a new roof to an existing roof.

This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. Each row should overlap the one below it by 1 4 inch 7 cm not less. Hammer the nail into the top part of each shingle. Venting the eaves to vent the roof holes are cut in the old roof above the soffit which pulls air through the soffit vents underneath.

The shingles should jut out from 1 4 to 3 8 inch 7 to 1 cm over the drip edge. How to roof over existing shingles. It is the process where roofers install a new roof over your existing one i e. If the broken piece is lost cut a new piece to fit the existing shingle.

How to tie a additions roof to existing roof roof additions to existing roofs how to construct a roof from an exsisting shead how to change a roof line how to attach a deck roof to existing roof how to add a roof over porch attache porch roof on house attach shed roof to house adding a roof to screened in porch adding a roof to existing. Then nail shingles on the new roof and exposed areas of the old roof. Fold new shingles over the new valley onto the old roof overlapping by at least a foot. This method usually allows for the proper exposure of the roof shingles and is commonly used when applying metric sized roof shingles over english sized or over wood shingles.

If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. The bridging method allows the new course of roof shingles to overlay 2 or 3 courses of the existing roof shingles. Let s start with the good. Roofing over an existing roof is also called reroofing or an overlay.

Nail a horizontal row of shingles over the drip edge. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option a properly installed layover roof can look and function as well. Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. When roofing over your existing shingles can be a good idea.

Add a new layer of shingles which means that there is no tearing off of the old roof. Finish your gable roof addition tie in by installing siding to match the existing house and fascia and trim boards at eaves and edges. The goal is to provide a reasonably flat surface for the new shingles to lie over with no gaps greater than 1 2 inch. When you should tear off your roof and start from scratch instead.

Why installing new shingles over old shingles can be good.