Rigid Foam Insulation Rafters

Meps is a rigid board formed by molding polystyrene into boards.

Rigid foam insulation rafters.

Measure the length and width between two rafters in your attic and transfer the measurements to a 4 ft by 8 ft of rigid foam insulation board. But a 2x6 rafter with a 1 5 vent space would give you the ability to put 4 of rigid insulation r 26 in that space which was not filled. The rafters are 2 6 so there is 5 5 of depth under the roof deck to put layers of rigid foam into as a stack of pancakes between the rafters. Polystyrene can be fashioned into various items including shipping materials such as packing peanuts and coffee cups as well as sheets of foam board insulation.

2 would be to create the baffle in the 1st place. I would also like to attach 4 x8 sheets of rigid foam at least 1 2 inch thick to the lower edge of the rafters to prevent thermal bridging. The 4 of rigid foam under the rafters at least give you r26. Rigid insulation is one of the best tools to reduce your energy costs.

There are currently three types of rigid foam board. However rigid foam insulation must be covered with a fire rated material when used on the interior of a building. They keep your home at a comfortable temperature without the need to crank your heat. Think of the same example of a wall and attaching drywall with the tons of screws.

Rigid foam insulation also known as insulating boards provide high r values. Molded expanded polystyrene foam board. You can also add rigid foam insulation under the rafters which adds r value and eliminates thermal bridging through wood rafters. You can even place it under the foundation slab.