How To Shingle A Roof Over Old Shingles

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.

How to shingle a roof over old shingles. Damaged shingles should be removed to check the decking for problems. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Roofing second layer of shingles roofing. You can t do it with wood or slate for example and you should never mix materials such as laying asphalt shingles over cedar shakes.

We discuss the nesting method which helps minimize an uneven appear. Install a layer of roofing felt over the roof before you begin installing the new shingles. To lay out the design for the shingles begin at the bottom of the roof and place a tape measure inch from the edge of the roof to ensure the shingles overhang the drip edge. Measure the length of a shingle as it lies across the roof.

Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Choose a shingle style with the same dimensions as those on your. The felt should be secured every six inches with nails or staples.

Looks just as good and lasts as long. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. If the job is done correctly with the new layer of shingles laid flat over the existing shingles the old roof cushions the new one and serves as a secondary barrier should wind or water ever break through the new shingles. Asphalt roofing felt paper and nail it in place using 1 inch galvanized roofing nails.

Has the same manufacturer s warranty. In this video we provide details on how to install roof shingles over existing shingles. If your roof s width is not an even multiple of the shingle s length you will have a partial piece on one end of each row. Damaged decking will need to be repaired before you can install any new shingles.

All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Most asphalt shingles are 3 feet 91 4 centimeters in length. But before we get started one thing must be clear. Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles.

This will help determine how the shingles will lay on the roof width. Installing a new roof over shingles takes less time than tearing off the old roof.