FOAMULAR® High-R CW Plus

ASTM C578 Type IV, 25 psi, 1.55 pcf density

Foamular High-R CW Plus

When you need excellent performance in masonry cavity wall insulation, High-R CW Plus insulation from Owens Corning is your best choice. High-R CW Plus insulation combines the outstanding moisture resistance you have come to expect from extruded polystyrene with excellent thermal performance. As with our standard FOAMULAR® extruded polystyrene insulation products, High-R CW Plus is a rigid closed cell extruded polystyrene board.

The main advantage of High-R CW Plus insulation over other extruded polystyrene boards is its higher R-Value per inch. An R-Value of 10 can be achieved with just a 1¾” thick board. Standard extruded polystyrene requires a thickness of 2” to achieve an R-10. This gives the designer the opportunity to increase the air gap (thereby decreasing mortar bridging and improving the cavity performance) while maintaining the same thermal performance as a standard 2” extruded polystyrene board. Additionally, the designer can also choose to increase the thermal performance of the wall assembly by choosing High-R CW Plus insulation with a thickness of 2⅛”. This provides an R-value of 12 with only a slight increase in board thickness.

Owens Corning’s FOAMULAR® extruded polystyrene insulation is an ENERGY STAR® qualified product.

Thickness Width / Length Edge Type
 1¾", 2⅛"   16" x 96"   Square  
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Other sizes/edge configurations may be available with minimum order.

We recommend FOAMULAR® High-R CW Plus for the following applications:


Product Overview