Rigid Foam Under Metal Roof

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.

Rigid foam under metal roof.

I know that most roofs have ventilation under them to prevent overheating of the roofing material. Will that be a concern with metal roofing. Rigid foam boards come in different material compositions varying thicknesses and different insulating r value properties. Install rigid foam insulation over the entire surface of the roof.

I am planning to reroof a house in maryland with standing seam metal. Cut each sheet to the desired size using a utility knife then fasten it in place using staples or adhesive. I agree to that extent and always recommend a solid deck or some sort of strapping to prevent this. Foil insulation is a radiant barrier and it works by.

You just need to be careful not to pull torque the panels when fastening them. Use duct tape to seal the seams and further protect against moisture air leaks. It has to be installed on plywood osb or possibly purlins. Place the sheets close together but don t let them overlap.

I would be interested to hear of the experience of others who have added insulation in this manner. Plywood sheathing then roofing felt than 1 5 rigid foam metal roofing. I have a 90 year old stone cottage in portland oregon. It will help you to eliminate problems that may come when the house becomes extremely cold in the winter and terribly hot in the summer.

Insulating with spray foam insulation. Rigid foam works great and the metal can be installed directly over the top of it. Avoids nails or screws which could penetrate the metal roof and cause leaks. As far as i know standing seam metal roofing can t be installed on rigid foam.

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. If you want to be sure talk to your roofer or the manufacturer of the roofing panels. Rigid foam under metal roof 11 12 2015 11 35 am. According to the manufacturer s instructions install the metal roofing panels over the insulation.