Roofing Over Old Shingles Instructions

Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Roofing over old shingles instructions.

But before we get started one thing must be clear. 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. Next remove old shingles and flashing. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h.

Prep work for re roofing over asphalt shingles. How to install a roof over an existing roof. Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles. 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.

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. Use caution so you don t damage any windows or siding in the process. Using your hammer pry up the 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. In fact the only pro to a shingle over is it s cheaper and cleaner. 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. 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.

All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Remove the metal flashing. Roofing second layer of shingles roofing. 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.

Another added benefit is that the layers of your old roof will further insulate your home. Bring a trash can up on the roof so you have a place to throw old shingles and flashing. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Can i install a new metal roof over shingles.