How To Install A Metal Roof Over Existing Shingles

Start with an underlayment over the existing shingles.

How to install a metal roof over existing shingles.

You must put in a completely new underlayment over the existing shingles before you carry out any installation. As long as the plywood under the shingle roof is in good condition this way can provide many benefits. Metal roofing sheets have to be installed one at a time. This will help prevent water leakage and provide a buffer between the metal roof and the existing shingles.

Place a sheet from top to bottom on a section of the roof. Drip edge or edge metal is a piece of metal that extends approximately 0 75 inch beyond the roof s edge to channel runoff into your gutters. Yes you can install a metal roof over shingles. Use 1 4 inch metal wood screws to attach the metal sheets to the wood slat board base.

To install it slide the flat wide flange underneath. This is by far the most common way to install a metal roof. How to install a metal roof over existing shingles. In terms of aesthetics you need to be careful in terms of choosing your metal roof solution so that it will blend into your surrounding neighborhood.

However you ll want to check with your local building department before you make any decisions. 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.