One of the most striking features Kemperol 2K-PUR was specified for
of the new extension is a curved, the waterproofing.
10m-long roof, which dominates the
space and frames a bean-shaped
courtyard. A pipe runs down the
building’s rear wall to meet the new
roof. When rainwater gathers at the
top of the townhouse it falls through
the pipe and follows the roof’s
curving leading edge to a spout over
a long rainwater harvesting tank.
The tank floods the patio at the push
of a button, transforming it into a
reflecting pool.
Robust and Flexible Waterproofing
Odourless and solvent free, the liquid
waterproofing system was installed
by north-London based roofing
contractors Liquid Waterproofing
Ltd. It was applied directly onto the
110m-thick plywood structure, in
a single wet-on-wet process using a
reinforcement fleece. Once cured,
the system formed a seamless,
elastomeric waterproof membrane
which bonded directly to the
substrate.
Tony Mctigue director of Liquid
“As the structural concept hadn’t
been tried before, the roof was
carefully load tested using bags of
water. As Kemperol has excellent
elasticity this also provided the
assurance that the waterproofing
would not be affected if there was
any movement.”
Structurally, the roof is unique as Waterproofing Ltd said: “The steep it has been built using layers of slope and curves on this unusual 6mm plywood, which sandwich roof demanded a very easy to apply an insulating core and allow for and durable waterproofing solution, After the Kemperol 2K-PUR had been
25 circular skylights. A thin steel so Kemperol was ideal. As it is laid applied, it was topped with richly
support post hidden within the using a roller and wet-on-wet, we planted sedum. However, as parts
glazing framing allows the roof to were able to install it quickly and of the roof’s perimeter remained
apparently span free over the space. effectively including around the visible, Kemperol Reflect was also
detailing, specifically the circular applied. This is a white waterproofing
lighting units. system comprising special liquid
Given the unusual shape and style of
the roof structure, Kemper System’s
A Complete Solution
synthetic properties which reflect
UV and infrared radiation away
from the roof, ensuring the surface
temperature remains cooler than
when using traditional darker roofing
materials.
Stuart Hicks from Kemper System
commented: “Kemperol provided a
perfect membrane for the green roof
and will provide long-term protection,
ensuring this stunning structure
retains its impressive appearance for
many more years to come.
“As the property is in close proximity
to a number of neighbours and
is also used as workspace for the
architectural practice, which
remained operational throughout the
project, the fact Kemperol 2K-PUR
is odourless and solvent free was
another major benefit.”
The Sun Rain room has won multiple
awards including being named
the overall winner of New London
Architecture’s prestigious Don’t Move,
Improve! awards in 2018, which
showcase the Capital’s best and most
innovative new home extensions.
www.kempersystem.co.uk