Rigid Foam Insulation Rafters

Consider using high density r 30 batts which are as thick as r 25 batts but fit into 2x10 framing.

Rigid foam insulation rafters.

They keep your home at a comfortable temperature without the need to crank your heat. Meps is a rigid board formed by molding polystyrene into boards. 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. 2 snap a chalk line between the length measurements.

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. Molded expanded polystyrene foam board. 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.

Install it anywhere from the roof to the foundation. There are currently three types of rigid foam board. Rigid foam insulation also known as insulating boards provide high r values. However rigid foam insulation must be covered with a fire rated material when used on the interior of a building.

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. Rigid insulation is one of the best tools to reduce your energy costs. Think of the same example of a wall and attaching drywall with the tons of screws. 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.