Roofing Over Old Shingles Instructions

How to install a roof over an existing roof.

Roofing over old shingles instructions.

Remove the metal flashing. Roofing second layer of shingles roofing. 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. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Using your hammer pry up the nails. Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles. Next remove old shingles and flashing. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Another added benefit is that the layers of your old roof will further insulate your home. 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. Bring a trash can up on the roof so you have a place to throw old shingles and flashing.

Use caution so you don t damage any windows or siding in the process. 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. 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. Prep work for re roofing over asphalt shingles.

All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Begin by removing the shingles using a roofing shovel. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h.

Can i install a new metal roof 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. In fact the only pro to a shingle over is it s cheaper and cleaner. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option.