Rigid Foam Under Metal Roof

Plywood sheathing then roofing felt than 1 5 rigid foam metal roofing.

Rigid foam under metal roof.

Rigid foam under metal roof 11 12 2015 11 35 am. Rigid foam works great and the metal can be installed directly over the top of it. Foil insulation is a radiant barrier and it works by. According to the manufacturer s instructions install the metal roofing panels over the insulation.

Cut each sheet to the desired size using a utility knife then fasten it in place using staples or adhesive. Install rigid foam insulation over the entire surface of the roof. I agree to that extent and always recommend a solid deck or some sort of strapping to prevent this. Rigid foam boards come in different material compositions varying thicknesses and different insulating r value properties.

Place the sheets close together but don t let them overlap. Use rigid foam insulation to cover wider spans of roof sheathing between joists. I know that most roofs have ventilation under them to prevent overheating of the roofing material. Avoids nails or screws which could penetrate the metal roof and cause leaks.

I am planning to reroof a house in maryland with standing seam metal. Insulating with spray foam insulation. If you want to be sure talk to your roofer or the manufacturer of the roofing panels. It has to be installed on plywood osb or possibly purlins.

Insulating a metal shed roof with rigid foam can be done one of three ways by laying the board prior to applying the roof by removing the existing roof and installing new foam board or by insulating the existing metal roof from the inside. Under consideration is the addition of eps xps or isc under the metal. You just need to be careful not to pull torque the panels when fastening them. Will that be a concern with metal roofing.

I have a 90 year old stone cottage in portland oregon. Foil insulation underlayment is recommended under a metal roof and in most cases the shiny side should be facing up but there s a catch. Use duct tape to seal the seams and further protect against moisture air leaks. I would be interested to hear of the experience of others who have added insulation in this manner.