but the roofing and cladding contractor
appointed to the scheme, M.H. Massey,
proposed that this should be changed to
Kemper System’s Kemperol V210 wet-on-
wet liquid membrane.
As M.H. Massey’s project manager, Dave
Sampson, explained: “A flat roof of this
size in a woodland site and a location
known for its wet climate is potentially
vulnerable to leaks if a seamed system is
used because even a 1mm gap in the weld
could result in water ingress.
“Our advice was to opt for a seamless
membrane that adheres directly to the
substrate to form a flexible monolithic
membrane and our experience of Kemper
System’s membranes led us to suggest
Kemperol V210.”
M. H. Massey proposed the change to Kier
and set about convincing the design team
at FCB Studios that revising the roofing
specification would benefit the project.
Samples of cured Kemperol V210 were
made up to demonstrate the flexible
seam-free membrane and the discussions
resulted in the change of specification
being agreed as part of a warm roof build
up.
Warm Roof Build Up
M.H. Massey laid the steel decks to form
the roof before beginning installation of
the Stratex warm roof system comprising:
Kempertec Type 1 primer, Kempershield
vapour control layer (VCL), 150mm
Kempertherm FR hard top insulation,
and Kemperol V210 liquid waterproofing
system.
Kempertherm FR insulation board has a
3mm reinforced facing that can be used
on areas subject to greater point loading
or more frequent traffic. This offers a
cost-effective solution for more frequently
trafficked areas and avoids the labour
and material costs of a traditionally used
plywood strengthening layer.
Working in sections, the insulation was
laid directly onto the vapour barrier,
with the joins between sections sealed
using Kempertherm joint fleece, before
application of a primer and then the
reinforced Kemperol V210 resin to
complete the 900m2 2-part roof one area
at a time.
Sustainability Secured
The completed roof and the rooftop
plant will be hidden from view at ground
level thanks to sections of stainless steel
panelling that have been installed around
the roof perimeter.
Kemperol V210’s BBA-accredited
service life of 25 years means that the
museum’s estates team can be confident
of a low maintenance roof installation,
while the warm roof build up will aid
thermal performance in line with Part L
building regulations, the new facility’s
BREEAM rating and Amgueddfa Cymru’s
sustainability commitment.
[email protected]
www.kempersystem.co.uk
Although some of the contractor’s team
had wide ranging experience of using the
Kemperol system, others had previously
only been used to laying single ply
membranes, so Kemper System provided
installation training at the company’s
purpose-specified training facility in
Warrington. Technical representatives from
Kemper System also visited the site during
the programme to advise and support the
installation team.
On completion of the roof areas a man
safe system was installed and the fixing
points subsequently waterproofed using
Kemperol V210 to maintain the seamless
membrane.