internal drainage board

Drainage board, which possesses high strength, high compressive strength and doesn’t distort or burst molded PP as a protective material for waterproofing and provides ventilation for concrete slabs, which alleviates heat-induced stress and cracking.

Drainage board, which possesses high strength, high compressive strength and doesn’t distort or burst molded PP as a protective material for waterproofing and provides ventilation for concrete slabs, which alleviates heat-induced stress and cracking.

Drainage board, which possesses high strength, high compressive strength and doesn’t distort or burst molded PP as a protective material for waterproofing and provides ventilation for concrete slabs, which alleviates heat-induced stress and cracking.