As a building contractor, you will no doubt come across many situations where specialist waterproofing knowledge is required.
This could be on either a new-build project, which incorporates basement accommodation, or a refurbishment of an existing property with a basement, cellar or vaults.
There are many different options for waterproofing structures below ground, which generally fall into three different categories under BS8102:2009. These are;
Type A (barrier) protection: Where a permanent membrane, which could be a waterproof render, is relied upon.
Type B (structurally integral) protection: where the structure is built using reinforced, waterproof concrete.
Type C (drained) protection: where a cavity membrane system, incorporating drainage and sump pump units, is installed.
More often than not, in compliance with current legislation, a combination of at least two of these options is installed to ensure the structure is water-tight.