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EXTERNAL ENVELOPE
Proctor Group supports developer to implement Passivhaus standards
P house builder.
ipers Square in Charlestown, Dublin is one of four projects currently under construction by Cairn, Ireland’s largest Pipers Square represents
the company’s fi rst foray into delivering residential accommodation to the Passivhaus standard. Over 1,700 units are expected to be delivered by the fi rst half of 2026, with some 600 units of those ready to occupy at Pipers Square by the end of 2025. The Proctor Group’s external air barrier, , is part of the external wall
Wraptite®
specifi cation at Pipers Square. In addition, the Group’s technical services team assisted Cairn with U-value calculations, and a condensation risk analysis to explore the effect of vapour permeable insulation.
Adapting existing specifi cations to meet the Passivhaus standard The site was acquired with planning permission for a scheme that was never designed with the standard in mind. A
feasibility study carried out by Cairn, looking at what they would need to do over and above a ‘nearly zero energy’ specifi cation, allowed them to make the commitment to Passivhaus. As reported in Passive House+ magazine, the study found that “Cairn’s quality assurance focus and approach to meeting the nearly zero energy building standard required under Irish building regulations made passive house surprisingly attainable.” Wraptite is a Passivhaus-certifi ed component,
reinforcing its credentials as
a high-quality product suitable for use in Passivhaus buildings. That it was already part of the external wall specifi cation serves to demonstrate the existing ‘quality assurance focus’ of Cairn Homes.
Installing Wraptite at Pipers Square Installation of Wraptite at Pipers Square was the responsibility of specialist
contractors
Platt & Reilly Ltd. As a company they have plenty of experience of the product. Wraptite
is an airtight and vapour permeable membrane with a W1 water penetration classifi cation. It played a crucial role at Pipers Square in conjunction with an internal airtightness line. The vapour permeability of Wraptite also allows the passage of moisture vapour and helps to eliminate any condensation risk in the wall. With the decision to adopt the Passivhaus standard, Cairn worked with the Proctor Group’s technical services team to fully assess the external wall build-up for any moisture risks. They chose to explore several options for internal vapour control layers, including the possible effect of using a vapour variable membrane with the vapour permeable mineral wool insulation. A comprehensive condensation risk analysis, carried out using WUFI®
software, showed
the proposed build-up was not subject to any moisture risk due to condensation.
01250 872 261
proctorgroup.com/products/wraptite
Specify with Confi dence: Yeoman Rainguard Rainwater Solutions
E
very successful building begins with a well-resolved envelope,
where even the most practical components
contribute to the overall design. A carefully specifi ed rainwater system does more than manage water: it can reinforce architectural intent, complement the elevation and deliver reliable, long-term performance. Yeoman Rainguard gives architects the freedom to specify rainwater solutions around the needs of each project. Its extensive range includes aluminium and GRP gutters,
alongside fascia,
downpipes and hoppers, soffi t, coping and anti-
climb products. Multiple profi les, capacities and confi gurations make it easier to fi nd an appropriate solution for contemporary developments, refurbishment schemes and character-sensitive buildings. Design fl exibility extends to colour. Products are available in more than 50 colours, with colour-matching options from recognised ranges including RAL, Dulux,
Little Greene and Farrow & Ball. Whether the aim is to coordinate with facades and roofl ines or introduce a carefully considered contrast, Yeoman Rainguard helps rainwater systems become part of the architectural language rather than an afterthought. Specifi cation support is available from the earliest design stages. Architects can access technical specifi cations, fi xing instructions, maintenance guidance and practical help choosing the right system. Where additional assistance is required, the Yeoman Rainguard
team can review architectural drawings, produce a product take-off and provide an itemised quotation. Free site surveys are also available, helping turn design intent into a coordinated, buildable solution. With options for high-capacity drainage, economical installations and bespoke project requirements, the range combines practical performance with visual choice. Installation advice and access to Yeoman Rainguard’s own team and approved installers provide further support through delivery. This joined-up approach can simplify procurement, improve coordination and give project teams greater confi dence from initial specifi cation through manufacture, delivery and installation. For your next project, specify a rainwater system designed to perform, complement and endure. Speak to Yeoman Rainguard early and give every elevation the complete solution it deserves.
0113 279 5854
www.rainguard.co.uk
WWW.ARCHITECTSDATAFILE.CO.UK
ADF OCTOBER/NOVEMBER 2026
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