Concrete roof slabs in Indian buildings frequently experience severe dampness due to standing rainwater accumulation. Standard wooden ceiling battens absorb this water and rot, causing gypsum ceiling panels to collapse. Mounting a 6mm APD PVC Foam Board as a moisture shield is the only permanent solution to protect false ceiling layouts.
Step 1: Installing a Galvanized Iron (GI) Framing Grid
To avoid structural failures, carpenters must frame a GI metal channel grid suspended from the concrete slab using anchor fasteners. Space the T-sections at 400mm intervals. Fix the lightweight 6mm PVC boards to the metal frames using self-tapping drywall screws, ensuring complete isolating ventilation behind the sheets.