Can U Put Metal Roofing Over Shingles

Can you put steel roofing over asphalt.

Can u put metal roofing over shingles.

However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Installing shingles over metal roofing is not a thing that you should even try to do. Can you avoid tearing off your old asphalt shingle roof by putting a steel roof over it. Installing a metal roof over shingles can also result in an increased chance of trapped water vapor and moisture between the new roof and old roof resulting in new mold and rot.

As you can imagine there are a lot of differing opinions on whether it is permissible to put metal over the top of other roofing materials. In some areas building officials only allow a re roof over one layer of shingles. Most codes now allow no more than two layers of roofing before requiring a complete tear off. Otherwise you will need to remove the shingles.

The second way to install a metal roof over a shingle roof is with the use of purlins or battens. This method has its benefits as well. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it.

If you don t want to take our word for it check with your local building department. Disadvantages of metal roofs. By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them from being thrown into landfills. On has the metal expands and contracts due to weather changes the metal will actually move.

Some contractors feel that there is a problem with too much weight causing stress on the roof trusses and that condensation could be an issue. By removing the old roof before the new roof s installation you are able to give the underlayment a thorough inspection to ensure there are no damages that could. Metal roofing weighs less than one pound per square foot. However you can install metal roofing over the asphalt shingles but vice versa is not recommended.

1 remove the shingles before installing the metal roof the first way to install a metal roof over shingles is by completely removing the old shingles before installing the new metal roof. The purlins are screwed or nailed down to the roof deck depending on how the metal roofing manufacturer has testing for their roofing panels and then the metal is installed to the purlins. A benefit to doing it this way is that you can see if there is any rotten plywood that needs to be replaced before installing the new roof. Asphalt shingles can weigh up to four pounds per square foot depending on the brand.