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EXTERNAL ENVELOPE
Wraptite® W raptite® ,
external air barrier helps to deliver performance and quality in new development
external air barrier from Proctor Group, is part of the high-
the vapour permeable A.
performance residential building specification in the new Dublin city quarter, Glass Bottle. The creation of Glass Bottle is transforming some 15 hectares of a former glass bottle- making site that was once home to one of the most modern factories in Europe. The work currently being undertaken, and which features the use of Wraptite as part of the specification, is Phase 1.
Specifying an external air barrier for the new Glass Bottle city quarter
The external wall build-up of the apartment buildings is a fairly typical light steel frame structure with a sheathing board and external finish. Designed and specified by Dublin-based architectural practice Henry J. Lyons,
the
Wraptite external air barrier was named within their specification pack.
As an airtight and vapour permeable
control membrane as part of a belt-and- braces approach.
The residential apartments feature mechanical heat recovery ventilation, so an airtightness target of less than 3 m3
/hr/m2
membrane, Wraptite can be positioned to the external side of the structure. This moves the airtightness barrier away from the internal services zone,
will be desirable. The better the standard of airtightness achieved on the project, the more efficiently the heat recovery ventilation will operate – and that all depends on the quality of the installation.
simplifying detailing and
reducing the number of penetrations through the membrane. At the same time, allowing the passage of moisture vapour eliminates condensation risk.
It is even possible to use Wraptite as the sole membrane in a wall build-up, subject to the appropriate condensation risk analyses being carried out. However, at Glass Bottle, the Phase 1 specification still included an internal vapour
ADF11_A Proctor_External Envelope -
Membranes_HPAdv.indd 1
Installing Wraptite external air barrier on Phase 1 of Glass Bottle The performance of Wraptite membrane is founded on it being a simple, self-adhesive solution, with the added benefit of Wraptite Tape being used for particular areas of detailing. This approach saves on the labour and material costs associated with meeting modern energy efficiency requirements, which are at the forefront of Glass Bottle’s conception.
01250 872 261
proctorgroup.com 18/11/2024 13:18
WWW.ARCHITECTSDATAFILE.CO.UK
ADF NOVEMBER/DECEMBER 2024
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