Reroof Over Existing Metal Roof

By using roof huggers the existing roof can be left in place.

Reroof over existing metal roof.

We have safely installed over 1000 roofs. This provides a safer environment for both workers inside the building and the roofers as they install the new roof. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option. Our roof systems can be installed over existing metal shingle rubber and asphalt roof systems.

If your roof is in good shape but has some damage to one side from a downed tree or has lost shingles in a wind storm an overlay is worth considering. Yes you can install a metal roof over shingles. There s little to no material removed which can keep costs down. 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.

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. Less labor is needed and there are much smaller refuse fees. 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. However you ll want to check with your local building department before you make any decisions.

Single ply roof systems are also lightweight and utilized for retrofits over existing metal roofs figure 2. 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.

A mobile home roof over creates a unique opportunity to completely change the look of the home. This provides added protection against ice dams. A properly installed layover roof can look and function as well. However installing new flashings including special drip edge flashings made for reroofing will ensure a tight seal and a long life.

However it is important that you know the weight capacity of your roof and how many layers of shingles are currently on the roof.