Greater than 90%. This series has the highest light reflectance among Bony fiberglass ceiling tile products due to its smooth surface and light color. NRC rating > 0.80. Mild variation with thickness. VOC, Formaldehyde Emission Formaldehyde content: < 1.5 (mg/L). Insulation Value R Factor 4.0 Btu or 0.7 Watts Anti-mold/mildew and bacteria Fiberglass substrate is inherently resistant to the growth of bacteria, mold and mildew. Cleaning Use wet cloth to gently wipe surface. Mild detergents may be used. Fine grain sand paper may be used to scrubb off some shallow stain marks. Weight 2 kg/m2 or 0.5 lb/ft2
