Roofing Over Old Shingles Instructions

Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles.

Roofing over old shingles instructions.

Roofing second layer of shingles roofing. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Remove the metal flashing. Another added benefit is that the layers of your old roof will further insulate your home.

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. Use caution so you don t damage any windows or siding in the process. 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. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Prep work for re roofing over asphalt shingles. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. 1 remove the shingles before installing the metal roof the first way to install a metal roof over shingles is by completely removing the old shingles before installing the new metal roof.

How to install a roof over an existing roof. Next remove old shingles and flashing. Inspect the condition of the existing roof and roof deck for numer of roof layers soundness of roof decking smoothness of existing roof installation and other factors that determine whether or not you can do a roof over or if a roof shingle tear off is required. Bring a trash can up on the roof so you have a place to throw old shingles and flashing.

Yes you can and by doing so you save in the labor and hassle of tearing off the old roof and you won t be contributing to filling our landfills. 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. But before we get started one thing must be clear.

Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. A benefit to doing it this way is that you can see if there is any rotten plywood that needs to be replaced before installing the new roof. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Using your hammer pry up the nails.