How To Install Insulation Under Existing Metal Roofing

Lay and attach plywood or osb oriented strand board to the exterior.

How to install insulation under existing metal roofing.

Remove the existing roof if you have one. But it is important to make sure that the paper liner is installed correctly between the sheathing and the insulation to prevent mold and mildew. Insulating a new metal roof step 1 install plywood or oriented strand board osb to act as structural roof sheathing. How do i insulate a metal shed roof with rigid foam.

Insert a plate every 2 square feet of insulation board. Enter fiberglass insulation a common relatively inexpensive easy to use product. It can lie down perfectly under the metal roofing without having to deal with the hassle. If you plan to insulate your metal roof with fiberglass go ahead but follow smart installation procedures.

Make sure that the insulation you are using is the same thickness so that the metal roof will fit better. Use a drill to drive. Install by using staples. Attach a weather proofing or vapor resistant sheet of material over the plywood.

Lay the plywood perpendicular to the roof joists and fasten it in place using galvanized or stainless steel roofing nails. In this case simply lay the insulation between the purlins. Using staples will allow you to install the insulation easily and quickly. One of the more popular methods of placing metal roofing on a home is to lay down purlins across the existing shingles.