Rigid Styrofoam Insulation R Value

It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation.

Rigid styrofoam insulation r value.

Because of this i often get questions about which type of foam board insulation to use and what r values these products provide. 4 5 21. 4 8 7 21. Fiberglass insulation is less than half the price of rigid foam insulation when calculated by r value per square foot.

For example insulating a 10 square foot wall area to r 15 costs about 3 40 to 4 00 with fiberglass insulation while a comparable r value for rigid foam costs roughly 10. Used in this way the foam lowers the loss of energy through framing members a phenomenon called thermal bridging and increases the overall r value of the roof or wall assembly. Phenolic foam spray insulation. You can even place it under the foundation slab.

R 0 77 30 phenolic foam insulation r values. 8 3 4 4 8 2 20. It is often used as a layer of continuous insulation on exterior walls and in the roof. Very good air bypass leak sealing properties.

Install it anywhere from the roof to the foundation. Foam board insulation types. They keep your home at a comfortable temperature without the need to crank your heat. Eps is used under roofing over foundation walls and beneath siding.

Rigid insulation is one of the best tools to reduce your energy costs. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. There are three basic foam insulation board products on the. Rigid foam insulation also known as insulating boards provide high r values.