52
EXTERNAL ENVELOPE
ARBOSHIELD Pro® ARLISLE® building envelope specialist,
, the waterproofi ng and has
leading ARBOSHIELD Pro®
extended the company’s market- fi re-rated facade
systems range with the launch of two new pasted fi re-resistant membrane systems. The new products mean that specifi ers can now choose both the fi re-rating and installation method best-suited to their project from CARLISLE®
13501-1 certifi ed range. The launch of the ARBOSHIELD®
’s independently tested EN Pro
Class A2 Pasted Facade System (ARPS) and ARBOSHIELD Po®
BRPS Class B Pasted
Facade System means that both A2-s1,d0 and B-s1,d0 reaction to fi re classifi cations are available from CARLISLE®
in a choice of self-
adhesive or pasted solutions, all providing high performance, durability and buildability. ARBOSHIELD®
Pro ARPS is the non-
combustible, pasted EPDM alternative seal and interface sealing membrane system for windows and structural openings that
Wraptite®
delivers A2-s1, d0 fi re classifi cation for higher risk buildings. ARBOSHIELD Pro®
BRPS is CARLISLE®
range of self-adhesive and
pasted Class A and B membrane systems C
the UK market carry only a Class B s3, d0 rating, ARBOSHIELD Pro®
BRPS has an
industry-leading ‘s1’ certifi cation for risk of smoke in the event of a fi re, which means it is more effective at limiting smoke. Both new additions to the range are designed to seal window and structural openings and provide a high-performance interface sealing membrane. Each has been rigorously tested as a complete system, with both membrane and adhesive designed to work seamlessly together and certifi ed as a cohesive system.
Across the full self-adhesive and pasted ’s
Class B s1,d0 rated pasted facade membrane system, which has been fully tested and certifi ed as Class W1 rated. While many Class B-rated pasted facade membrane systems on
membrane plays key
role in Passivhaus leisure centre S
t Sidwell’s Point, in the heart of Exeter city centre, is the world’s fi rst Passivhaus- certifi ed, multi-zoned leisure centre. The
£44 million, world-leading project includes the A. Proctor Group’s Wraptite®
external air
barrier as part of the highly effi cient external wall construction.
The building was designed by Space &
Place Architects, alongside Passive House designers Gale & Snowden. On site, it was delivered by main contractor Keir. As well as Passivhaus certifi cation,
St
Sidwell’s Point was designed and constructed to Building Biology IBN best practice in Healthy Building Design, using data from the University of Exeter Climate Scientists to provide resilience against predicted climate change to 2080.
Applying the Passivhaus standard to a complex multi-zone building Leisure centres are complex buildings with different internal environmental conditions
for the
to accommodate. Carefully managing the various requirements – heating for swimming pools, cooling for fi tness studios, and a host of other spaces in between – is vital to the overall energy performance strategy. The starting point is the building fabric performance. For St Sidwell’s Point, primary considerations
specifi ed facade
systems were high levels of thermal insulation, minimal thermal bridging, and low levels of unplanned air movement.
The building featured three main types of external wall build-up: steel frame construction, blockwork, and cross-laminated timber (CLT). Common to all three was the placement of the insulation and air barrier to the outside of the structure, contributing to the target U-value of 0.14 W/m2
K.
Using Wraptite to achieve a high standard of airtightness Wraptite is a self-adhered membrane, which is both airtight and vapour permeable
membrane. Positioning it externally moves the airtightness barrier away from the internal services zone, simplifying detailing and reducing the number of penetrations. It is also a Passivhaus-certifi ed component, reinforcing its credentials as a high-quality product that can help projects to meet the standard. To supportits use, the A. Proctor Group provided a Wraptite toolbox talk on site, and conducted practical training using mock-up panels to demonstrate best practice installation.
01250 872 261
www.proctorgroup.com
range, the membrane systems have been developed to ensure reliable performance and optimal compatibility with various surfaces, delivering a robust barrier against water ingress and air leakage, which supports long- term structural integrity, energy effi ciency, fi re safety, and compliance.
info.arbo@
ccm-europe.com
www.arbo.co.uk
WWW.ARCHITECTSDATAFILE.CO.UK
ADF NOVEMBER/DECEMBER 2025
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