Insulating under metal roof. Commonly used insulation till recently these fiberglass batts formed a physical barrier between the metal roof and the interiors of the building. Best metal roofing insulation options by. As such an underlayment will provide added protection to your home that includes insulation as well as waterproofing and moisture elimination.
2layer building paper over the sheathing to help protect against moisture and leaks. There are different methods of insulating metal roofs. Insulating your metal roof will not only reduce the energy demands of your home but it will save the earth and reduce global warming.
What makes people hesitate is the condensation potential. This is different from the normal roll up type of insulation as it comes in panels rather than paper covered fiberglass. Avoids nails or screws which could penetrate the metal roof and cause leaks.
This is what i have done in my house to insulate the metal roof 1 install plywood or oriented strand board osb to act as structural roof sheathing. Metal roof insulation will keep your home warm in the winter cool in the summer and significantly reduce your utility costs. The best material for use with metal roof insulation is in the form of foam batting.
Adding a layer of insulation can eliminate this problem. Water trapped between fiberglass insulation and the exterior of a building will also cause mold fungus growth rust and oxidation conditions that will degrade the metal and shorten the service of the structure. 3install sheets of rigid foam insulation over the entire roof surface.
Cut each sheet to the desired size using a utility knife then fasten it in place using staples or adhesive. Fiberglass batts or glass mineral wool insulation. Use rigid foam insulation to cover wider spans of roof sheathing between joists.
They can not be placed directly underneath the metal roof as the condensation formed under the metal roof can seep into the metal roof insulation material and can ruin it.