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Basic Composition/Size
90% Portland cement, ground sand, Cellulose fiber and selected additives.
1/2” Sheet Size: 4’x 8’
Thickness: 1/2” nominal
Weight: 2.6 lbs/sq.ft.
Mold Resistance
Cement board products achieve a perfect score on both industry standard mold tests. Cement board scores a 0 (best possible score) on the ASTM G21 for mold resistance and a 10 (best possible score) on the ASTM D3273 test against mold growth.
Approvals
Cement board is recognized as an interior substrate according to the following: – National Evaluation Service (NES), Inc., Report – No. – NER-405 (BOCA, ICBO, SBCCI – City of Los Angeles, Research Report No. 24862 – City of New York MEA number 223-93M – HUD Materials Releases 1263d and 1268c – Tile Council of North America handbook
Flexural Strength
Based on typical Equilibrium Moisture Content: 2100 psi when tested in accordance with ASTM test me-thod C1185.
Non-Combustibility
Cement board is recognized for use in non-combustible construction in NER-405.
Surface Burning
Characteristics When tested in accordance with ASTM test method E-84:
