AAWU

Waterproofing (Basement Conversions)

Basement conversions are increasingly popular as a way of increasing living space at a reasonable cost. However, it is extremely important to ensure that the waterproofing design is drawn-up in accordance with the BS Code of Practice (BS8102:1990) and the work is carried out to the highest standards. Peace-of-mind is assured by contacting AAWU members who can provide a full design and installation service with work covered by underwritten 10 year guarantee if required.

All this means that once neglected, mouldy and dank basements can be transformed into wonderful cosy living areas.

Some Background

Basement or Cellar Waterproofing is the application of a covering to masonry usually, but not necessarily, below ground, to prevent or control penetrating dampness or water ingress. The masonry can be treated from outside or inside, but most waterproofing to existing buildings is carried out from inside, as access to the outside is not possible or practical. There are many types of Waterproofing system available and it would be difficult to review them all here. We cover only the basic details here. Each project will have its own conditions and requirements. We therefore strongly recommend you seek the advice of an AAWU member at an early stage of any project.

The type of waterproofing chosen depends on the conditions prevailing and the final use to which the room will be put. Different requirements apply for wine cellars and document storage areas! Sealed systems such as cementitious slurries and renders have been popular for decades and can be highly effective but their success often depends on site factors such as substrate suitability. Alternatively, an increasingly popular approach is the use of cavity drained membranes. These systems put less strain on the structure as water pressure can not build-up but they do require a sump and pump to carry away any liquid water ingress when the water table rises etc.

Choosing the right system is a matter for expert opinion and all AAWU members would be pleased to explain the pros and cons of each approach.