68 BUILDING FABRIC; FINANCE & INSURANCE
Using Wraptite® to achieve Ireland’s Home Performance Index certifi cation
A round 11,000 m2 of Wraptite® – the
Proctor Group’s external air barrier membrane – are being installed at
Rockbrook Apartments in Sandyford, Dublin. The 428 apartments, built in two blocks and arranged around two courtyards, are all being certifi ed to the Home Performance Index (HPI). HPI certifi cation includes enhanced levels of airtightness, as part of the overall aim “to produce great quality homes, healthy and comfortable, with effi cient use of resources, minimising waste and destruction of the environment. ”
WHAT IS HOME PERFORMANCE INDEX CERTIFICATION? Readers outside Ireland are unlikely to be familiar with HPI certifi cation. Essentially, it is a residential equivalent to BREEAM or LEED. First
trialled in 2016, the scheme is managed by the Irish Green Building Council. Demand for the certifi cation has grown
in the years since and, according to the HPI website, many developers use the certifi cation as “a symbol of quality assurance” in their developments. In part, that is because one of the fi ve core categories assessed for HPI certifi cation is quality assurance – alongside environment, health and wellbeing, economic, and sustainable location. For areas of the scheme considered to be most important, mandatory requirements are set to ensure a particular level of quality and comfort is achieved. Examples of such areas include water effi ciency, ventilation and thermal bridging, as well as the aforementioned enhanced airtightness. It is in this context that Wraptite has been
specifi ed and, at the time of writing, is currently being installed.
SAVING TIME AND COST WITH ONE MEMBRANE RATHER THAN TWO Rockbrook Apartments features a concrete frame with SFS infi ll stud. The Wraptite membrane, which is both airtight and vapour permeable, is applied to the external face of the wall structure. In this position, the airtightness barrier is moved away from the internal services zone, which simplifi es detailing
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and reduces the number of penetrations. At the same time, Wraptite’s vapour
permeability allows the passage of moisture vapour and helps to eliminate any condensation risk in the wall. Wraptite has always been a feature of the facade specifi cation at Rockbrook Apartments – and it was originally complemented by an internal membrane acting as a vapour control layer (VCL). “There was a bit of to-ing and fro-ing about the need for both membranes,” says Gerard Butcher, contracts manager at Comer Group Ireland. “Because of how Wraptite performs, we could remove the VCL and save the time and cost of fi tting two diff erent membranes.” The Proctor Group has been on hand
to support the project from the beginning. regional sales manager Tony Ruth has visited site multiple times, and Gerard is complimentary about the benefi ts of such comprehensive support.
01250 872 261
proctorgroup.com/products/wraptite
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