INSULATION
Why XPS is the ideal
insulation for cold roofs
Bryan Mawer, sales manager at Sundolitt, explains how the company has seen an increase in the move
towards green roofs and more recently blue roofs
Inverted roofs are a type of cold fl at roof
where the insulation is installed above
the waterproofi ng layer, therefore, the
insulation should be highly resistant to
water absorption, able to maintain its thermal
properties and structural composition –
making XPS the ideal material for this roof
construction.
Thermal performance is a crucial factor
when selecting insulation for your roofi ng
project. Sundolitt’s XPS resists water
penetration, thus maintaining the longevity
of its thermal-resistance (R-value) even in the
toughest conditions.
The low lambda values of XPS insulation
helps improve thermal conductivity (k-value),
which in turn, reduces energy costs and
environmental footprint.
Available with a ship lap edge, preventing
thermal bridging and reducing capillary
action, XPS has load-bearing characteristics
between 200 kPa–700 kPa, making it ideal for
weight-bearing applications.
Green roofs
A green roof, or living roof, is a type of cold
roof that can be covered with a shallow
growing medium, planted with sedum.
XPS insulation for a green roof can
withstand heavy loads, as well as footfall
from landscaped areas on the roof.
Blue roofs
A blue roof utilises the roof construction for
providing water attenuation capacity, rather
than quickly moving through the usual
conveyance system.
The water is released at a managed and
controlled rate, storing the rainwater as
required, all as part of the overall Sustainable
Urban Drainage Systems good practice
policy.
roof application, XPS not only provides
the required thermal performance for the
building, but it does not degrade or lose its
integrity when submerged in water.
according to the specifi cation, XPS is
installed with a fi ltration layer and can then
be overlaid with either paving or ballast.
capacity for weight-bearing applications with
the advantage of maintaining its insulating
performance, even in an environment of
rainfall saturation in the winter months.
w www.sundolitt.co.uk
Experts in EPS and XPS Insulation
for Construction
Servicing the UK through
our extensive distribution
network, Sundolitt
manufactures high
performance, load-bearing
insulation for a wide range of
applications.
From standard boards to
value-engineered solutions,
we ensure outstanding
customer service backed by
design and technical support.
To discuss your next
insulation design
specification get in touch
GREEN ROOFS
01786 471 586
enquiriesuk@sundolitt.com
www.sundolitt.co.uk
An ideal insulation material for a blue
Supplied in various thicknesses,
Sundolitt XPS combines the loading
FLAT ROOFS
FLOORS
A business built on air
48 www.rcimag.co.uk November 2018
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