Tyvek Housewrap Breather Membrane - 1.4m x 100m

Its main purpose is to allow moisture vapour to escape from within the wall structure while simultaneously protecting the building from external wind, rain, and air infiltration, thereby enhancing energy efficiency.

It is suitable for steel frame, timber frame, and concrete wall construction.

Each roll is supplied in dimensions of 1.4 meters by 100 meters.

By creating a windtight and airtight barrier, it minimizes uncontrolled air leakage, which reduces heat loss in winter and heat gain in summer, leading to lower energy consumption for heating and cooling.

Yes, it is CE marked and fully BBA, IAB, and UKAS approved, ensuring high quality and adherence to industry standards.

It significantly reduces the risk of interstitial condensation by allowing moisture vapour to escape. However, preventing all condensation also depends on overall building design, ventilation, and internal humidity control.

No, standard construction tools like a utility knife for cutting and a staple gun or hammer for fastening are typically sufficient. Always ensure personal protective equipment is worn.

Ensure the membrane is pulled taut during installation to avoid sagging. Increase the number of mechanical fixings or use a continuous battens system where specified to maintain tension. For existing sag, minor areas might be re-fixed, but significant sagging may require partial re-installation.

Thoroughly inspect all overlaps, penetrations (windows, pipes), and corners for inadequate sealing or tears. Ensure compatible tapes and sealants were used and applied correctly. Repair any damaged sections with appropriate Tyvek repair tape, ensuring good overlap. Check that flashing details are correctly integrated with the membrane.

Conduct a visual inspection for gaps at overlaps, junctions with other building elements (e.g., roof, foundation), or around service penetrations. Use compatible Tyvek tapes or sealants to seal any identified leaks. Consider a blower door test for comprehensive airtightness assessment and pinpointing exact leakage locations.

This could indicate internal condensation or external water ingress. Verify that the membrane was installed with the correct orientation (if applicable, though Tyvek is typically non-directional) and that no internal vapour barriers are trapping moisture on the cold side. Review overall wall design, including insulation and ventilation, to ensure proper moisture flow. Inspect the exterior for cladding damage or detailing issues allowing water to bypass the membrane.