Put Shingles Over Old Roof

Hence we are mixing sizes and nothing fits perfectly.

Put shingles over old roof.

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. Damaged shingles should be removed to check the decking for problems. It is not possible to mix materials nor to install a new layer over slate or wood tiles.

Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Has the same manufacturer s warranty.

We discuss the nesting method which helps minimize an uneven appear. March 11 2020 by safe harbor roofing reroofing is the practice that involves installing a new roof over an existing one. In fact the only pro to a shingle over is it s cheaper and cleaner. Installing a new roof over an existing one can only be done if you have shingles because you can only put shingles over shingles.

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. Manufacturers will still. Another reason is curling shingles as you can only install a new layer if the first one is completely flat and level. Install a layer of roofing felt over the roof before you begin installing the new shingles.

New shingles in canada are metric. But before we get started one thing must be clear. The trick is to never lay a shingle over the bump of an old shingle but always fill in the flat up to the next shingle and always glue down the shingles on the edge of the roof so that the wind will not catch. When contemplating a new roof many people hope to simply do a shingle over and avoid the extra cost and mess of tearing off the existing roof and starting from scratch.

The felt should be secured every six inches with nails or staples. Old shingles in north america were in inches. Should old shingles be removed before new installation. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

Looks just as good and lasts as long. Step 3 cover the old shingles. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.