A new self-build house in County Monaghan, Ireland, has been built incorporating the
high-performing Wraptite air-barrier from the A. Proctor Group. The project, designed by
McGuigan Architects, Monaghan, consists of a 250m2 detached private residence developed
by Mark Skinnader.
The client, Mark Skinnader, explains. “In the early stages of the project, the A. Proctor Group technical representative visited the site to identify a suitable airtight system. As there is no cavity in the proposed wall build-up, we chose the Wraptite breather membrane to act as a vapour permeable and airtight barrier at the sheathing board layer.”
The house design is a load-bearing Lightweight Steel Frame Construction. The steel frame system’s exterior finish is formed of a 12mm Y-Wall Sheathing Board, the Wraptite Airtight Breather Membrane, and a 150mm Sto EPS Insulated Render System.
The U-Value and condensation risk calculations carried out by the A. Proctor Group on the proposed through wall build-up confirmed no risk of condensation.
Because the house is a self-build project and the external finish was not critical to the overall programme, the membrane provided both a damage resistant air barrier layer and effective secondary weather protection in one installation process, to allow internal trades to proceed earlier. In addition, the self-adhesive application of Wraptite enables it to be left exposed for up to 120 days during construction.
On the performance of Wraptite on the project, Mark Skinnader commented, “The experience with Wraptite has been excellent. The material is extremely high quality and has provided an excellent weathertight seal to the building envelope. In addition, the selfadhesive nature of Wraptite makes the installation much quicker and more efficient. Waste was minimal, and offcuts could be re-used. The A. Proctor Group also provided Wraptite Liquid Flashing for sealing around windows, another excellent product. I am now actively looking at Wraptite on several large scale projects.”
The Wraptite system is the only self-adhering vapour permeable air barrier certified by the BBA. It combines the critical properties of vapour permeability and airtightness in one self-adhering membrane. As a result, it provides high vapour permeability in a continuously sealed, airtight membrane, saving time and cost.
The high vapour permeability of the Wraptite air barrier allows the substrate beneath to dry quickly and moisture vapour to escape and reduces the likelihood of mould, mildew, condensation, timber distortion and metal corrosion.
|Roll Size||1.5 x 50 m|
|Thickness||Calibrated Deadweight Micrometer||0.65 mm|
|Weight||Electronic Weigh Scale||292 g/m2|
|Application Temperature - Air & Surface Minimum||-10 C|
|Service Temperature||-40 to 80 C|
|Water Penetration - Before Ageing||EN 1928:2000 Method A||W1 Class|
|Water Penetration - After Ageing||EN 1928:2000 Method A||W1 Class|
|Air Permeance||EN 12114||0.01 m3/m2/hr @50Pa|
|Water Vapour Resistance Sd||EN ISO 12572(C)||0.039 m|
|Water Vapour Transmission||BS 3177:1959||893 g/m2/24hr|
|Peel Adhesion||EN 1939||5.01 N/10mm|
|Tensile Strength - MD||EN 12311-1||417 N|
|Tensile Strength - XD||EN 12311-1||252 N|
|Tear Resistance - MD||EN 12310-1||412 N|
|Tear Resistance - XD||EN 12310-1||286 N|
|Dimensional Stability - MD||EN 1107-2||0.3 %|
|Dimensional Stability - XD||EN 1107-2||+0.1 %|
|Reaction to Fire||EN 13501 - 1||B Class|
|Flexibility at Low Temperature||EN 1109||No cracks at -40C|
|Wraptite - BIM Object - Steel Frame||IFC|
|Wraptite and Facadeshield UV - BIM Object - Steel Frame||IFC|
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|Wraptite - BIM Object - Steel Frame Wraptite Tape Over Board Joints||IFC|
|Wraptite - BIM Object - Wraptite Tape Over Board Joints||IFC|
|Wraptite - BIM Object - Ventilated Timber Frame With External Airtight Membrane Wraptite||IFC|
|Wraptite - BIM Object - Ventilated Timber Frame With External Airtight Membrane And Wraptite Tape Over Board Joints||IFC|
|Wraptite - BIM Object - Warm Roof Slate With Softwood Sarking||RVT|
|Wraptite - BIM Object - Warm Roof Tile With Plywood Sarking||RVT|