Rigid Foam Board Under Metal Roof

Install it anywhere from the roof to the foundation.

Rigid foam board under metal roof.

Cut each sheet to the desired size using a utility knife then fasten it in place using staples or adhesive. It is not the normal insulation type that can be rolled up. Rigid insulation is one of the best tools to reduce your energy costs. Spray foam generally outperforms batt and blanket but loose fill and rigid board are good options too.

It can be touted that foam batting material is the best one to pair with metal roof insulation. Use rigid foam insulation to cover wider spans of roof sheathing between joists. You can always install this foam on the inside and outside of the sheath. Fiberglass is also one of the preferred materials for metal and steel buildings and homes.

Avoids nails or screws which could penetrate the metal roof and cause leaks. 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. Insulating with spray foam insulation. You can even place it under the foundation slab.

Rigid foam insulation also known as insulating boards provide high r values. Rigid board made from fiberglass would be the best option for roofs and basements as the high insulation rating allows it to insulate the home better than say loose fill or batt and blanket. Rigid foam boards come in different material compositions varying thicknesses and different insulating r value properties.