The Wraptite external air barrier system from A. Proctor Group, selected
as part of the redesign and extension of a residential property on the Essex
coast, will improve energy efficiency and protection from the elements.
Designed by AFT Design architects, the works comprise a significant conversation project. The existing detached residential dwelling on the clifftop at Frinton on Sea was partly demolished and extended with large attractive single-storey extensions constructed to the rear elevation and roof level.
Both extensions comprise a light gauge steel LGS panelised system, including a sheathing board and Wraptite installed by Nexus Modular. In addition, a proprietary Wetherby rendered cladding system will subsequently cover the LGS panelised system.
Bill Attwell, Director of Nexus Modular, explains why Wraptite, the only self-adhering vapour permeable air barrier certified by the BBA, was selected.
“We chose Wraptite for the breather membrane because of its strength and durability. In addition, the self-adhesive fixing of Wraptite, rather than the traditional staples and mechanical fixing, assisted with the durability in the high wind conditions prevalent on the cliff-side location.
The erected LGS frame with sheathing and breather membrane had to be left exposed for some weeks until the render cladding system was installed, exposing it to the elements on an exposed clifftop site.
The self-adhesive application of Wraptite simplifies the installation and provides a totally durable solution. We will be using Wraptite on future projects.”
Wraptite combines the critical properties of vapour permeability and airtightness in one self-adhering membrane. As a result, this approach saves on both the labour and material costs associated with achieving the energy efficiency demands in buildings.
|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|
|Wraptite - BIM Object - Steel Frame With Reflectite Tape Over Board Joints||IFC|
|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|