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Wraptite® airtightness solution provides huge benefits for Anglesey modular homes

The superior airtightness performance of the Wraptite membrane from the A. Proctor Group is delivering huge benefits to both the in-factory and on-site construction of a series of new modular social housing for Anglesey Council.

Wraptite is the only self-adhering vapour permeable air barrier certified by the BBA. Applied externally on the outside of the structural frame, Wraptite simplifies the process of maintaining the envelope’s integrity, as there are less building services and structural penetrations to be sealed.

The high vapour permeability of Wraptite 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. The self-adhesive nature of Wraptite means that it is easy to apply together with Wraptite Corners and the fact there is no requirement for mechanical fixings.

Specialist contractor Kenton Jones was commissioned by the Isle of Anglesey County Council to construct the new homes using a high-performance timber frame system. Managing Director, Kenton Jones explains how Wraptite was key to achieving a quality airtightness solution which was suited to modular build.

“After 10 years of building an open panel high-performance timber frame system, we moved to a factory insulated closed panel system which had the airtightness and VCL applied in the factory and simply taped on-site. This worked well when the airtightness layer was fully accessible before services were installed on site.

“In 2019 we built a new module factory and delivered our first set of modules early 2020, it was then we realised internal airtightness was going to be a difficult detail. When building modules that are fully factory finished internally but need to be craned together on-site to form the same dwelling both in a vertical and horizontal joint, we identified that there would be areas of the building which would remain inaccessible after installation on site.

“The first stage of the project was supplied with internal airtightness applied off-site that had very technical, vulnerable details to continue the airtightness around the dwelling within the small access areas left for finishing on-site after installation. This method proved very time consuming in the factory swapping from our usual airtightness board to flexible airtightness membranes between the modules. The cost of this was not sustainable so we needed to look for an alternative.

“We chose Wraptite to achieve the low value airtightness we required for the module system. The benefits of having the airtightness layer externally were a huge saving in time in the factory and impressive simplifying of details to achieve the same quality results. Wraptite was installed off-site in a factory environment for speed and ease and simply taped together on-site between modules to achieve the airtightness.”

“Overall we saved time and money with Wraptite, we now have a set of high performance technical details for the airtightness in our module system which are easy to achieve and help maintain a robust quality control system.”







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Material Properties

Wraptite-SA

Property Test Method Result
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

BIM Objects

File Format
A Proctor Group Ltd Steel Frame Wraptite RVT   IFC
A Proctor Group Ltd Steel Frame Wraptite And Facadeshield RVT   IFC
A Proctor Group Ltd Steel Frame Wraptite And Reflectite Tape Over Board Joints RVT   IFC
A Proctor Group Ltd Steel Frame Wraptite And Wraptite Tape Over Board Joints RVT   IFC
A Proctor Group Ltd Steel Frame Wraptite Tape Over Board Joints RVT   IFC
A Proctor Group Ltd Ventilated Timber Frame External Airtight Membrane Wraptite RVT   IFC
A Proctor Group Ltd Ventilated Timber Frame External Membrane Joint Tape Over Board Wraptite Tape RVT   IFC
A Proctor Group Ltd Ventilated Timber Frame External Over Sheathing Joints Taped Wraptite Reflective Tape RVT   IFC
A Proctor Group Ltd Warm Roof Wraptite Slate With Soft Wood Sarking RVT   IFC
A Proctor Group Ltd Warm Roof Wraptite TileWith Ply Sarking RVT   IFC

UK Availability

North East Scotland & Islands
Linda Kay
Regional Sales Manager

07817872980

Ireland
Sam Swindell
Regional Sales Manager

07875656305

Wales, Midlands & South West
Adam Salt
Regional Sales Manager

07817873124

London & South East
Josephine Matchette
Regional Sales Manager

07535450346

East England
Will Jones
Business Development Manager

07974087243

Global Availability

North America
Jeff Dibdin
International Account Manager.

07534436615

South America
Jeff Dibdin
International Account Manager.

07534436615

Europe
Jeff Dibdin
International Account Manager.

07534436615

MENA
Jeff Dibdin
International Account Manager.

07534436615

Asia
Jeff Dibdin
International Account Manager.

07534436615

Australia
Jeff Dibdin
International Account Manager.

07534436615


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For any building to have an energy efficient, healthy, moisture free building envelope there is a clear need to manage the balance of Heat, Air and Moisture movement (HAMM) throughout the building’s life cycle from design, construction, completion and use.

 

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