List of featured suppliers of CAVITY DRAINAGE Membranes NBS Specification J40 (Clause 290) Flexible Sheet on Building Products Index
Cavity drainage is a method of waterproofing that involves the use of flexible sheets (specified in NBS clause J40, clause 290) to create a membrane which lines the cavity between the internal and external walls. These flexible sheets are designed to be both durable and resistant to water penetration, allowing them to effectively protect the interior of buildings from any potential water damage. The use of this method is particularly useful in construction and building projects where the ground around the building is prone to high levels of humidity or where there is a risk of water ingress due to poor weather conditions.
