| 1. | Steel Studs: Minimum 3-5/8" depth, 25 gauge galvanized steel studs, spaced 16" oc. |
| 2. | Insulation: Minimum 3" thickness, 3 pcf mineral fiber batt insulation (rockwool), conforming to ASTM-C665 Type I, friction fit in joist cavities. |
| 3. | Gypsum Wallboard, Side A: 5/8" Type X gypsum wallboard installed horizontally or vertically and fastened with minimum 1-1/4" Type S drywall screws, 8" oc at board perimeter and in field areas of boards. |
| 4. | Fibre-cement Board, Side B: 13/32" Hardibacker 500® backerboard, applied horizontally or vertically and fastened with minimum 1" long No. 8 by 0.323" HD ribbed furring screws, located 8" oc along board perimeter and in field areas of boards. |
| 5. | Ceramic Tile: Nominal 4" by 4" by 1/4" standard grade ceramic wall tile. |