Put Shingles Over Old Roof

New shingles in canada are metric.

Put shingles over old roof.

Damaged decking will need to be repaired before you can install any new shingles. In this video we provide details on how to install roof shingles over existing shingles. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. In fact the only pro to a shingle over is it s cheaper and cleaner.

Looks just as good and lasts as long. Installing a new roof over an existing one can only be done if you have shingles because you can only put shingles over shingles. Installing a new roof over shingles takes less time than tearing off the old roof. Install a layer of roofing felt over the roof before you begin installing the new shingles.

Old shingles in north america were in inches. Another reason is curling shingles as you can only install a new layer if the first one is completely flat and level. Hence we are mixing sizes and nothing fits perfectly. 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. Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles. It is not possible to mix materials nor to install a new layer over slate or wood tiles. The felt should be secured every six inches with nails or staples.

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. Should old shingles be removed before new installation. Step 3 cover the old shingles. Has the same manufacturer s warranty.

Manufacturers will still. 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. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. March 11 2020 by safe harbor roofing reroofing is the practice that involves installing a new roof over an existing one.

In this video i take show how to proper recover an old roof and make it look like it s a single layer check it out you might find useful tips for your new. 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. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.