Sto Corp's 2 in. x 2 ft. x 4 ft. Rigid Graphite GPS Polystyrene Insulation Board, R-9.4 ensures exceptional long-term dimensional stability, meaning it will not sag, shrink, or lose thermal resistance over its operational lifespan. This premium insulation board is specifically tailored for seamless integration into high-performance continuous insulation wall installations and advanced exterior stucco systems. Its innovative breathable matrix allows moisture vapor to escape harmlessly from interior wall cavities while preventing external moisture intrusion when paired with proper fluid-applied barriers. The standard 2 ft. x 4 ft. face dimensions simplify structural coverage across uniform stud patterns to reduce layout waste. Choosing this architectural-grade foam sheathing provides general contractors with a reliable, budget-conscious thermal barrier for robust building envelope protection.
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