Metal Roofing Directly Over Shingles

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.

Metal roofing directly over shingles.

Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh. These systems aren t attached to a frame but instead install directly on the old roof. This provides a couple of benefits. Second the frame creates a flat and straight surface even when the shingles are badly curled or the roof ridge is bowed.

There are really two ways to install a metal roof over a shingle roof. 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. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. The first way is to run new underlayment over the existing shingle roof completely covering the old roof.

The vast majority of installations of the metal roofing systems produced by my company are over existing shingles. The first one being that the new underlayment will act as a second line of defense in case water would to somehow get underneath the metal roof. Asphalt shingles can weigh up to four pounds per square foot depending on the brand. Consequently they don t have the same ventilation advantages.

Can you put metal roof over shingles. The low weight of metal roofing is one thing that encourages this. Disadvantages of metal roofs. Our metal roofing profiles.

Metal is the best choice due to its very low weight per square foot and its unique design. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. But some steel shingle manufacturers offer do it yourself systems that cost about the same as an installed asphalt roof. Can you put metal roof over shingles.

If you don t want to take our word for it check with your local building department. 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.