top of page


Bentonite permanent waterproofing - Volclay

We have had multiple failures of bentonite based waterpoofing systems below the water table - in particular Volclay supplied by Allco. 


The use of Volclay on blockwork as per Allco conflicts with the manufacturer CETCOs specifying documents.


THE USE OF VOLCLAY when used below the water table as a stand alone product DOES NOT COMPLY WITH BS  8102 2009 Code of Practice for protection of below ground structures against water from the ground.

Amended Mike Sparrow 26  June  2017

bottom of page