New Roof Over Old Roof

Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

New roof over old roof.

This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles. Installing new roof shingles over old effectively doubles the weight of the roofing so you have to make sure your roof structure can handle the extra load. You can save money because there s no dump fee for removing your old roofing and there s no need for additional felt paper over the old roof. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option a properly installed layover roof can look and function as well.

Why installing new shingles over old shingles can be good. Let s start with the good. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

It can save you money at the time but it might actually end up costing you more in the long run. That s also why building codes commonly limit re roofing to no more than two layers.