How do you waterproof a terrace?

Waterproofing a terrace involves applying liquid-applied waterproofing beneath the terrace covering. The substrate must be sound and clean, while sufficient falls ensure drainage. The terrace waterproofing protects the building structure below from water ingress over time.

The liquid-applied waterproofing is applied directly to the prepared substrate, including concrete, screed, existing tiles or bitumen. It seals junctions at the house wall, door threshold and drains without seams, whereas such junctions are often weak points in sheet waterproofing systems. The elastic waterproofing bridges cracks in the substrate.

Apply the liquid-applied waterproofing in at least three coats. The test certificate requires a dry-film thickness of at least 3 mm; where water may temporarily pond, a dry-film thickness of 4 mm is required. The elastic waterproofing bridges substrate cracks up to 0.5 mm wide.

Once fully dry, rubber slabs or tiles can be laid directly on the waterproofed area as the terrace covering. A further coating can also be applied directly.