Triton’s TT Vapour Membrane was used as the primary method of waterproofing an extension to the basement of a listed Georgian house. The existing basement was extended beneath the garden to connect to an existing garden building at the edge of the property.

The new subterranean room accommodates a swimming pool and is covered with a 300 M² turf roof. the new ground slab (basement roof) and this was covered with Platon Double Drain membrane to form a protective layer for the primary waterproofing and a drainage layer for the turf roof construction.

TT Vapour Membrane is a liquid applied coating (NBS Clause No J30) which, once cured, provides a waterproof and ground gas proof barrier. The new slab was laid to falls and two coats of TT Vapour Membrane were applied at a rate of 1 Litre per M² (each coat) to the slab, and returned to the upstand wall and in to pre-formed drainage discharge outlets within the upstands, which direct any excess water to a land drain below slab level.

Platon Double Drain membrane (NBS Clause J40) comprises a studded HDPE membrane with a Geotextile fleece layer which is heat welded to it at manufacture. Laid with the fleece layer uppermost, this filters any fines, clay or soil from entering the intended drainage/water collection point.