How To Shingle A Roof Over Old Shingles

Install a layer of roofing felt over the roof before you begin installing the new shingles.

How to shingle a roof over old shingles.

Roofing second layer of shingles roofing. Asphalt roofing felt paper and nail it in place using 1 inch galvanized roofing nails. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. We discuss the nesting method which helps minimize an uneven appear.

All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Measure the length of a shingle as it lies across the roof. 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. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Step 3 cover the old shingles. But before we get started one thing must be clear. Manufacturers will still. Has the same manufacturer s warranty.

Looks just as good and lasts as long. 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. 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. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

In this video we provide details on how to install roof shingles over existing shingles. This will help determine how the shingles will lay on the roof width. 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.

Most asphalt shingles are 3 feet 91 4 centimeters in length. The felt should be secured every six inches with nails or staples. 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. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles. Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles.