Bateman's Tower Cafe, Brightlingsea

BATEMAN'S Tower cafe, brightlingsea

 

client:

dg timber solutions ltd

 

products used:

the challenge

DG Timber Solutions, specialist designers
and manufacturers of timber frame
construction were awarded the contract
to build the structure’s wall panels in the
factory and install on-site, with the
objective of achieving an overall wall
U-value of 0.20W/m²K.

With the structure being located in a coastal
and sea front area open to high winds and
driving rain, the challenge for the
specification of building materials was to
find an external breather membrane with a
W1 water penetration resistance in
alignment with the Structural Timber
Association’s STA Advice Note 18.

A product was required that could
withstand these extreme conditions whilst
the external wall was exposed during the
construction phase, whilst also delivering
sustainable aged thermal performance.
On the warm side of the insulation, a
thermally efficient vapour control layer was
also needed to manage condensation risk
and ensure airtightness at internal
junctions. DG Timber Solutions contacted
Protect Membranes to consult on the best
product solution to meet these testing
requirements.

the solution

Following technical discussions with
DG Timber Solutions, Protect’s Technical
team undertook both U-value
calculations and condensation risk
analysis on the proposed wall build-up,
incorporating specific Protect products,
in order to deliver the required thermal
efficiency and achieve the U-value
target, whilst ensuring water tightness on
external walls in the severely exposed
location.

The proposed solution was to incorporate
Protect Thermo Extreme, a highly
reflective, insulating breather membrane
with a resistance to water penetration of
Class W1 to BS EN 1928. This was
designed to be used with the reflective
surface facing into an unventilated
external wall cavity, combined with the
internal use of air and vapour control layer
Protect VC Foil Ultra facing into a 20mm
still airspace, sealed with Protect tape for
airtightness. This thereby helped to
ensure heat would be retained in the
structure.

The proposal was agreed by
DG Timber Solutions and the main
contractor, with Protect Thermo
Extreme then installed externally on the
timber frame panels in DG Timber’s
factory under controlled conditions and
Protect VC Foil Ultra fixed on-site, post
service installation. The combination of
these two products helped to ensure
the thermal enhancement for the
structure was achieved, along with all
the usual hallmarks of high
performance as expected with Protect
products.

To download the Case Study PDF click here