Metal Roofing Directly Over Shingles

This provides a couple of benefits.

Metal roofing directly over shingles.

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. 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. Asphalt shingles can weigh up to four pounds per square foot depending on the brand. Metal is the best choice due to its very low weight per square foot and its unique design.

If you don t want to take our word for it check with your local building department. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. 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. Our metal roofing profiles.

The low weight of metal roofing is one thing that encourages this. Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh. Second the frame creates a flat and straight surface even when the shingles are badly curled or the roof ridge is bowed. Consequently they don t have the same ventilation advantages.

These systems aren t attached to a frame but instead install directly on the old roof. Can you put metal roof over shingles. Disadvantages of metal roofs. The vast majority of installations of the metal roofing systems produced by my company are over existing shingles.

Metal roofing weighs less than one pound per square foot. But some steel shingle manufacturers offer do it yourself systems that cost about the same as an installed asphalt roof. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. The first way is to run new underlayment over the existing shingle roof completely covering the old 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. Advantages of metal roofs over shingles.