A property that has the potential for a basement/cellar conversion is seen as a positive investment as more and more people turn to converting unused space such as basements and cellars for extended living areas, home offices or gymnasiums which are just a handful of projects that A1 Dampproofing Ltd has taken care of.

During an inspection of a basement or cellar prior to a conversion. Our specialist surveyor will advise the client on a number of various systems and techniques that can be utilised when converting such space depending on the circumstances surrounding the project to eliminate any dampness within the basement or cellar. This will include consideration of the 2 most widely used systems within basement and cellar conversions which consists of either a cementitious type chemical vertical membrane or a cavity drain membrane system.

Cementitious type membranes is a traditional way of waterproofing basements and cellars and are suited to basement or cellar conversions where there is limited space and drainage cannot be achieved.

Cavity drain membrane systems are developed so that water is allowed to penetrate the structure where it is controlled in the air gap and diverted to a specified drainage point. Pressure is not allowed to build up against the internal construction and along with the air gap behind the membrane, this allows the structure to breathe and dry out.

One of the main advantages of a cavity drain membrane over a cementitious system is that they do not stop water at the point of entry, so hydroscopic pressure is not increased any more than it would be without a waterproofing system. For this reason, it is often possible to retain substrates which would have to be replaced when using a cementitious system, and yet still comply with BS 8102.