Hydroduct® CF 08
BBA Agrément Certificate
High-density polyethylene combined cavity former and vapour barriers for drained BS 8102:2009 Type C basement construction.
Suitable for the internal face of concrete floors and walls to form drained cavities horizontally and vertically.
A range of high density, high strength, chemically resistant polyethylene drained cavity formers designed to reduce the risk of water ingress beneath floor screeds and between concrete and blockwork walls to form an efficiently drained cavity to new and existing sub-structures. When installed against the internal face of concrete floors and walls, Hydroduct® CF will provide a continuous drainage path that must link to the site internal drainage system. Not suitable for internal applications where no linking with the site drainage system is possible. Hydroduct® CF forms part of a Type C structure (drained protection) as described in BS 8102. The cavity formers are compatible with all cementitious, bituminous, and polyethylene building materials.
Hydroduct® CF 08 is designed to form drained cavities vertically in lower risk applications and Hydroduct® CF 20 is designed to form drained cavities horizontally and vertically.
Floor slabs should ideally be laid to falls to drainage gully or outlets. A flat slab is acceptable providing there are no adverse falls and low spots are infilled. Where surface irregularities exceed 5 mm, cut back and make good.
Seal all joints with Servitape double-sided adhesive tape. Seal all penetrations through with Servijoint One DW sealant.
2000 x 20 000 mm
J40/290 High-density polyethylene/ polypropylene studded cavity drain membrane
High-density polyethylene (PE-HD).
Cavity former and vapour barriers for drained BS 8102:2009 Type C basement construction.
British Board of Agrément (BBA) Certificate.
Roll length (minimum)
Designed to form drained cavities vertically in lower risk applications.
Overlap all vertical joints 150 mm (minimum).