The company then prepared and cleaned
the roof surface and, in the areas around
the upstands where the failed membrane
had not bonded, the team pulled off the
damaged membrane.
New insulation had to be cut to size
and shape and this was done while the
Kemperol V210 membrane was being
installed so that the balconies could be
completed as quickly as possible.
The existing insulation, slabs and green
roof medium were then reinstated to
complete the roof.
The team then moved onto the 8,500m2
former hotel roof, which comprises five
‘fingers’ with a central core.
Hotel Roof
Water ingress around the roof outlets
meant that the recently installed warm
roof insulation was already sodden and
the roof had to be stripped back to the
vapour barrier.
The damage caused by the failed
waterproofing membrane on the roof
and balconies of the former hotel
building was even more significant
because the original roof build-up was
not inverted.
Having completed the strip out, Cawston
Roofing allowed the concrete substrate to
dry on each balcony and the decision was
taken to reinstate the build-up for each
balcony as an inverted warm roof.
When weather conditions did improve,
the Kempertherm sections were fixed
to the substrate and joint sealed before
application of the Kemperol V210
membrane began.
Thanks to the replacement of the
originally-specified waterproofing system
with Kemperol V210, the building not
only provides a stylish address on the
coast that is warm and dry for residents
but also protects a slice of the UK’s
holidaymaking heritage and an iconic
listed building.
Page 91 - Archetech
The balconies were tackled first, with
strip out of the entire roof build-up. Here,
not only had the originally-specified
membrane failed, but the insulation
below it had begun to rot too.
To aid water run-off in the future, Kemper
System designed a tapered Kempertherm
insulation scheme, introducing a slight
pitch to each section of roof. Cawston
Roofing pre-primed each piece of board
in an on-site workshop during the winter
months to aid faster installation once the
weather improved.
Holiday Heritage