Our saveBOARD betterBRACE 4Steel product is a thermally broken Rigid Air Barrier, which is a cost-effective, high-performance exterior sheathing for steel framed buildings. Suitable for everything from residential homes to multi-story construction. Engineered for strength, it is designed for use in Extra High wind zones and finished with a moisture-resistant facing material for superior durability combined with a 10mm EPS backing to provide a R 0.4 thermal break.