Retrofit
Basement in 1850's-built Semi-detached House, Notting Hill, London
A main
building contractor needed advice on a retro fit basement construction as part
of the refurbishment of a semi detached house built circa 1850.
In accordance
with BS8102 Wykamol specified a Type C cavity drain membrane system
incorporating both central and perimeter drainage to the front and rear of
the basement evacuating to several twin pump sump chambers
configured with battery back-up alarm systems.
The main
contractor appointed an approved basement contractor to carry out the
waterproofing works. Wykamol supplied and supervised the installation of
two foul and grey waste water pumping stations complete with an additional
back flow valve.
The basement
comprised of staff quarters, living area and kitchen / dining
area leading out to a terraced garden which featured a below ground
swimming pool with associated changing rooms and steam room.
The top side of
the swimming pool slab was waterproofed to a Wykamol specification.
The waterproofing
challenge was compounded by stepped levels from the front of the property
to the back. This led to combined applications of cementitious, liquid
membrane and cavity drain membranes to achieve a dry result.
This case
study has been submitted by a member and the British Structural
Waterproofing Association accepts no responsibility for its content.
