In keeping with the high-performance residential building specification in the new Glass Bottle Dublin city quarter, Henry J Lyons chose Wraptite®, the vapour permeable external air barrier from A Proctor Group, as part of the external air barrier for the external wall build-up of the apartment buildings.
The external wall build-up of the apartment buildings in new Glass Bottle Dublin city quarter 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 membrane, Wraptite can be positioned to the external side of the structure. This moves the airtightness barrier away from the internal services zone, 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 control membrane as part of a belt-and-braces approach.
