Product Description

FOAMULAR® 604 Ribbed

3 in. x 2 ft. x 8 ft. R-15 Channel Edge Insulation Sheathing

FOAMULAR® 404 and FOAMULAR® 604 extruded polystyrene insulations are specially designed for use in Protected Roof Membrane Assemblies (PRMA), where the insulation is placed directly over the membrane. The compressive strength of FOAMULAR® extruded polystyrene insulation provides the integrity needed for long-term roof performance. Extruded polystyrene is the type of insulation recommended for PRMA applications. Owens Corning offers four specific types of FOAMULAR® extruded polystyrene insulation for this use: FOAMULAR® 404 and 604; and FOAMULAR® 404 RB and 604 RB. Both the 404 RB and 604 RB extruded polystyrene insulations feature drainage channels running the length of the panel. These are excellent extruded polystyrene products.

Key Features

• FOAMULAR® 404 and 604 XPS Rigid Foam Insulation products protect the roof membrane from physical damage, thermal stress and UV exposure in PRMA systems
• Designed for use directly with pavers, FOAMULAR® 404 RB and 604 RB XPS Rigid Foam Insulation products provide the support necessary for pavers while maintaining the drainage necessary to prevent moisture accumulation at the foam-paver interface
• Excellent long-term stable insulating performance with an R-value2 of R-5 per inch
• Exceptional moisture resistance, long-term durability
• Limited lifetime warranty — maintains 90% of R-value and covers all ASTM C578 properties
• GREENGUARD Gold Certified
• The only XPS foam with certifi ed recycled content— certified by SCS Global Services to contain a minimum 20% recycled content
• Will not corrode, rot or support mold growth
• Zero ozone depletion potential with 70% less global warming potential than our previous formula
• Lightweight, durable rigid foam panels are easy to handle and install
• Easy to saw, cut or score

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

Learn more about rigid insulation R values