How To Shingle A Roof Over Old Shingles

Looks just as good and lasts as long.

How to shingle a roof over old shingles.

Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles. Damaged shingles should be removed to check the decking for problems. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. The felt should be secured every six inches with nails or staples.

Install a layer of roofing felt over the roof before you begin installing the new shingles. Although many metal roof systems can be applied over an existing roof layovers are more commonly done with asphalt shingles. This will help determine how the shingles will lay on the roof width. Has the same manufacturer s warranty.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Measure the length of a shingle as it lies across the roof. Step 3 cover the old shingles. We discuss the nesting method which helps minimize an uneven appear.

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. In this video we provide details on how to install roof shingles over existing shingles. 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. Most asphalt shingles are 3 feet 91 4 centimeters in length.

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. Roofing second layer of shingles roofing. Asphalt roofing felt paper and nail it in place using 1 inch galvanized roofing nails.

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. Choose a shingle style with the same dimensions as those on your. But before we get started one thing must be clear. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Damaged decking will need to be repaired before you can install any new shingles.