Can Metal Roofing Be Applied Over Shingles

A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.

Can metal roofing be applied over 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. Yes you can install a metal roof over shingles. In some areas building officials only allow a re roof over one layer of shingles. 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.

Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. You can apply fascia board and paint it just like you would any other exterior trim. This is just one way to apply metal roofing over composite shingles. The low weight of metal roofing is one thing that encourages this.

However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. However there are some things that you will want to check out before doing it this way. The first way is to run new underlayment over the existing shingle roof completely covering the old roof. However you ll want to check with your local building department before you make any decisions.

For one you will need to check with your local building department and ask if this is an approved installation method. Metal roofing weighs less than one pound per square foot. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. If you don t want to take our word for it check with your local building department.

The main benefit of doing it this way is that it is the fastest way to install a new metal roof over a shingle roof. Cool outside air then travels under the shingles to the vented ridge detail 2 pulling out moisture and heat. The vast majority of installations of the metal roofing systems produced by my company are over existing shingles. There are really two ways to install a metal roof over a shingle roof.

One big advantage to metal roofing is its light weight which means metal roofing can be installed over an existing shingle roof. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. A professional roofer or contractor may give you different advice based on the condition of your house. Asphalt shingles can weigh up to four pounds per square foot depending on the brand.