Rigid Foam Insulation Under Metal Roof

Install rigid foam insulation over the entire surface of the roof.

Rigid foam insulation under metal roof. I know that most roofs have ventilation under them to prevent overheating of the roofing material. According to the manufacturer s instructions install the metal roofing panels over the insulation. I have a 90 year old stone cottage in portland oregon. Compared to the fiberglass batts this insulation is much better.

Avoids nails or screws which could penetrate the metal roof and cause leaks. You can even place it under the foundation slab. Insulating a metal shed roof can keep a shed warmer even without a heat source. Cut each sheet to the desired size using a utility knife then fasten it in place using staples or adhesive.

Rigid insulation is one of the best tools to reduce your energy costs. Insulated roof assemblies can be vented or unvented. There are lots of different ways to insulate this type of roof but one of the best methods calls for the installation of rigid foam insulation above the roof sheathing. Financially speaking this spray is a great option especially when you need to renovate your roof after the application.

If you use bubble foil or rigid foam insulation it also goes on top of the moisture barrier. Use rigid foam insulation to cover wider spans of roof sheathing between joists. Plywood sheathing then roofing felt than 1 5 rigid foam metal roofing. There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing.

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. Install it anywhere from the roof to the foundation. Start at the bottom of the roof and place the first piece of rigid foam insulation against the metal flashing starting at the center line. Rigid foam insulation also known as insulating boards provide high r values.

They keep your home at a comfortable temperature without the need to crank your heat. Nail it around the edges with roofing nails. Polyurethane spray foam metal roof insulation. The foil insulation goes on top of the moisture barrier followed by the roof covering.

The spray can be basically applied on top or bottom of the metal roofing surfaces. Place the sheets close together but don t let them overlap.