Rigid Foam Insulation R Value

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.

Rigid foam insulation r value.

Dow styrofoam insulation blue board dow styrofoam insulation blue board is a nonstructural rigid board insulation manufactured of extruded polystyrene foam xps. Eps has the lowest average r value of the three most common types of rigid foam insulation around r 4 per inch. Fiberglass insulation packs in more r value per cubic inch than rigid foam insulation does. Rigid foam r values range from r 1 for 1 4 inch thick sheathing panels to r 15 for 3 inch thick panels.

Note from this chart that the ideal r value differs for each part of your home. Xps is rated at r 5 per inch. All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market.

With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness. 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. Expanded polystyrene eps or beadboard serves as the best insulating rigid foam for homeowners on a budget. Polyiso has an r value of r 5 7 to r 6 it s lower in cold weather.

These foam types have similar but somewhat different applications. The r value of eps ranges from about r 3 6 to r 4 2 per inch. 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.

This material costs less than other rigid foam boards but still offers an r value of. Eps is suitable for ground contact and can be treated to resist insects. 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. Products provide superior insulating properties.

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