Rigid Foam Insulation R Value

For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings.

Rigid foam insulation r value.

Rigid foam r values range from r 1 for 1 4 inch thick sheathing panels to r 15 for 3 inch thick panels. With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness. Polyiso has an r value of r 5 7 to r 6 it s lower in cold weather. Blue board can be used both on exterior and interior walls to give you a continuous insulation barrier that can increase effective r value of the wall by up to 20.

The r value of eps ranges from about r 3 6 to r 4 2 per inch. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed your attic to reach r 30 if you live in zones 2 or 3. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. These foam types have similar but somewhat different applications.

Expanded polystyrene insulation is similar to the foam used for packing peanuts and it s typically used for insulated concrete forms also knows as icf s. This material costs less than other rigid foam boards but still offers an r value of. Xps is rated at r 5 per inch. Falls in the middle of the three types of rigid foam insulation in both cost and r value used most in walls or below grade applications recyclable and at about r 5 per inch costs around 42 per sq.

Eps has the lowest average r value of the three most common types of rigid foam insulation around r 4 per inch. It also is the least expensive. This product typically has an r value of 3 6 to 4 0 per inch of thickness. Foamular extruded polystyrene xps rigid foamular extruded polystyrene xps rigid foam insulation offers a comprehensive line of products choose the strength you need from 15 to 60 psi and exceptional moisture resistance.

Expanded polystyrene eps or beadboard serves as the best insulating rigid foam for homeowners on a budget. Dow styrofoam insulation blue board dow styrofoam insulation blue board is a nonstructural rigid board insulation manufactured of extruded polystyrene foam xps. Note from this chart that the ideal r value differs for each part of your home. Products provide superior insulating properties.

All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered.