Reroof Over Existing Metal Roof

Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option.

Reroof over existing metal roof.

Some roofers install a layer of waterproof shingle underlayment wsu over the existing shingles at the eave end as would be done for a roof laid on bare sheathing. Less labor is needed and there are much smaller refuse fees. However installing new flashings including special drip edge flashings made for reroofing will ensure a tight seal and a long life. Building officials in some areas will only allow a re roof over one layer of shingles while officials in other places may allow you to place the roof over two layers of shingles.

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. Yes you can install a metal roof over shingles. This provides a safer environment for both workers inside the building and the roofers as they install the new roof. A properly installed layover roof can look and function as well.

However it is important that you know the weight capacity of your roof and how many layers of shingles are currently on the roof. The use of roof hugger systems allows you add blanket rigid and or reflective insulation between the existing and new roofs. Nailing new shingles over existing ones is less expensive and faster requiring less labor but it also means you lose the chance to assess the sheathing for signs of water damage. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof.

There s little to no material removed which can keep costs down. Our roof systems can be installed over existing metal shingle rubber and asphalt roof systems. Single ply roof systems are also lightweight and utilized for retrofits over existing metal roofs figure 2. By using roof huggers the existing roof can be left in place.

A mobile home roof over creates a unique opportunity to completely change the look of the home. However you ll want to check with your local building department before you make any decisions. Under many circumstances it is possible to install a new metal roof over the top of existing asphalt shingles even if there are two layers of asphalt shingles. We have safely installed over 1000 roofs.

A mobile home roof over involves placing a new roof or roofing material over your existing roof.