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Used to stop the low-level risk of condensation within the structure of factories warehouses, industrial units & storage areas, also works to improve the general airtightness of a building.
Restricts the movement of warm moist air from within a building to its walls and roof it subsequently restricts vapours from damaging the structure.
The Vapour barrier is used in low condensation risk buildings to omit the risk of interstitial condensation within the structure as well as improving the airtightness of the building.
The membrane restricts the passage of warm, moist air from within the building from permeating into the floor, wall or roof structure.
The membrane is designed to be installed to the warm side of floors, walls and roofs subjected to humidity levels less than 50% at 15°C (BS 5250: 2011 class 1 condition) e.g., warehouses, industrial units and storage areas.
Ensure surfaces are smooth, clean and dust-free. When bonding the membrane to the substrate, e.g., timber or metal stubs, the surface should be dry.
Visqueen Vapour Barrier Check should be installed in accordance with the recommendations of BS 5250:2002 Code of practice for control of condensation in buildings. The membrane should be installed on the warm side of the insulated structure, with care being taken to ensure that all laps, penetrations and abutments are sealed. The membrane should be continuous in order to ensure optimum vapour control performance.
Where the membrane is to be fixed to timber or metal frame structures, apply a continuous strip of Visqueen Double Sided Vapour Tape to all vertical and horizontal studs, head and sole plates, using a seam roller to ensure adhesion. Progressively peel the tape release film, and apply the membrane ensuring adhesion in the tape locations.
All joints in the membrane should be lapped by a minimum of 75mm and sealed with Visqueen Single Sided Vapour Tape applied equidistant over the lap. To aid formation laps should be made over a solid substrate.
Ensure membrane continuity at the junction of horizontal and vertical substrates. Seal abutments with Visqueen Pro Vapour Edge Tape applied centrally over the junction. Failure to suitably connect the membrane to other building elements will severely reduce vapour control performance.
Ensure the membrane is not damaged in service due to residual heat from light fittings. The barrier should not be subjected to gravity forces (unsupported) such as on the underside of roof decks or the underside of floor structures and should be suitably mechanically secured to ensure that it remains in position during service.
Approvals and standards
Visqueen Vapour Check Data Sheet