OTHER BASEMENT CONSTRUCTION OPTIONS

In-situ concrete Probably the best solution for retrofitting basements in existing houses. Usually reinforced to prevent cracking, but must be allowed to cure completely for maximum strength. Most projects will involve at least an in-situ concrete floor, sealed with a liquid tanking slurry.

Precast concrete Particularly cost effective at scale, this solution is popular with developers building several houses with basements to the same specification. It provides a good base for tanking treatments to adhere to.

Masonry Used in many existing basements dating from the Victorian era and after – but anyone who has one will know they are not particularly waterproof. These are best managed with a Type C (drained protection) system as well as a Type A latex tanking layer, as water will inevitably get through.

Twin wall Basically, a hybrid of precast and in-situ systems.

Thin precast walls are erected and filled with concrete. If done well, this forms a contiguous layer between walls and floors aiding the strength and waterproofing of the structure. It is similar in principle to ICF, but with added complexity.

Foundations On restricted sites or those close to boundaries, fair faced piles can be used to form the walls of a basement while also acting as the foundations of the home.