Putting Metal Roof Over Shingles

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

Putting metal roof over shingles.

Installing metal roofing over shingles there are two primary methods implemented when installing metal roofing over 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. Can you put metal roof over shingles the reason why this is important is because a shingle roof is granulated very similar to sandpaper. 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.

However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. This method has its benefits as well. Can i install a new metal roof over shingles. Better steel shingle systems like the one shown install over a framework of 2x2s.

They have always been popular on barns commercial buildings and. In a standing seam roof long single panels run vertically all the way from the eave to the ridge. It provides a solid flat surface to attach the new metal roof to it creates an air gap between the back of the metal and the shingle roof which allows for airflow. This allows the new underlayment to act as a line of defense in the event that water somehow gets under the metal roof.

The second way to install a metal roof over a shingle roof is with the use of purlins or battens. This framework has three big advantages. How to install metal roofing over shingles issues you might encounter. On has the metal expands and contracts due to weather changes the metal will actually move.

Otherwise you will need to remove the shingles. Yes you can and by doing so you save in the labor and hassle of tearing off the old roof and you won t be contributing to filling our landfills. However you ll want to check with your local building department before you make any decisions. First because the frame is screwed directly to the rafters and the interlocked shingles are screwed to the frame the roof can withstand winds of up to 120 mph without damage.

Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. Another added benefit is that the layers of your old roof will further insulate your home. Yes you can install a metal roof over shingles. If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.