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Atlas Rboard® rigid foam insulation is a closed cell polyisocyanurate (polyiso) foam core, faced with a non-reflective coated glass-mat facer on both sides. Rboard® combines high R-value, enhanced durability from two coated glass-mat facers, and water resistive attributes in a high performance rigid insulation board. Wall sheathing is suitable for a variety of continuous insulation (CI) applications. Panel sizes are 4' by 8' or 4' by 9'. Insulation panels can be supplied in nominal 16" or 24" widths for use in cavity wall applications. Custom sizes are also available.
Atlas polyiso has been tested for VOC and formaldehyde emissions, in which reported emissions were below the maximum emission levels allowed under both the GREENGUARD and GREENGUARD Schools and Children criteria. These tests confirm that Atlas polyiso insulation systems are all very low-emitting products.
Rboard® wall sheathing is recommended for use in residential applications as well as Type V light commercial construction. The glass-mat facers enhance the board’s durability in a similar manner to their use on exterior glass-mat gypsum boards. The glass-mat facers are more permeable than foil facers. Common applications include:
The use of Rboard® wall sheathing can be considered a WRB assembly and potentially part of an air barrier assembly. In these types of installations it is required to tape or seal all joints between boards and at penetrations and openings. Atlas recommends sealing into rough opening flashing and to other portions of the building, including the roof and below grade. Atlas Rboard® coated glass-mat facers are compatible with most standard joint fillers, sealants and adhesives. Consult the product manufacturer for specific compatibility. WRB Tapes and System