How To Shingle A Roof Over Old Shingles

Most asphalt shingles are 3 feet 91 4 centimeters in length.

How to shingle a roof over old shingles.

Manufacturers will still. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Installing a new roof over shingles takes less time than tearing off the old roof. 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.

Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. But before we get started one thing must be clear. Damaged shingles should be removed to check the decking for problems. Has the same manufacturer s warranty.

Damaged decking will need to be repaired before you can install any new shingles. 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. Step 3 cover the old 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. In this video we provide details on how to install roof shingles over existing shingles. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. The felt should be secured every six inches with nails or staples.

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. 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. Install a layer of roofing felt over the roof before you begin installing the new shingles. Asphalt roofing felt paper and nail it in place using 1 inch galvanized roofing nails.

Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles. Roofing second layer of shingles roofing. We discuss the nesting method which helps minimize an uneven appear. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h.

This will help determine how the shingles will lay on the roof width. Looks just as good and lasts as long.