Heating, Ventilation & Insulation
NATURALLY FEELING GOOD...
Invisivent ® EVO AK
The most discrete window ventilator
• Self-regulating fl ap: i-Flux
technology guarantees maximal
comfort and minimal energy loss
• Natural supply of fresh air
• Discrete installation on top of the
window frame
• Easy to maintain
• Different acoustic versions
available
• Water- and insect proof
www.rensonuk.net
Builders and developers ad-
vised to use polyurethane foam
for superior insulation
Design_by_build_180x132_1017.indd 1
Builders and developers advised to use poly- The trade association for the sprayed and
urethane foam for superior insulation injected polyurethane foam industry is the
British Urethane Foam Contractors Associ-
Polyurethane foam can be used as a high ation. BUFCA is a central resource for the
performing insulant in new build and refur- application of polyurethane foam systems.
bishment projects to meet or exceed today’s
standards.
The association consists of polyurethane
foam installers operating to high standards,
Builders and developers can also use it for together with material and equipment
remodelling purposes, for instance in barn suppliers.
conversions. When used for airtightness or
stabilisation under the roof or within the Choosing a material
cavity it outperforms most other materials. Where the primary purpose is energy effi-
ciency, then a closed cell material is normally
The polyurethane foam insulant is a preferable. Closed cell foams offer superior
two-component liquid system which produc- energy performance and are resistant to
es a highly-efficient blanket of insulation with driving rain meaning that the material stays
an exceptional thermal conductivity figure. dry with no loss of thermal properties. Open
cell polyurethane foams do not have the high
Systems can be applied to various depths insulation properties associated with the
and have K-values in the range of 0.025 closed cell materials.
to 0.028W/mK. It can be used in various
applications such as wall insulation and roof A recognised BUFCA registered installer
insulation. can be chosen at
www.bufca.co.uk
67
26/10/17 13:12