Tyvek® AirGuard® Smart AVCL is airtight and water resistant and adapts its vapour resistance as humidity levels change, giving buildings maximum protection against structural damage caused by humidity.

Tyvek® AirGuard^® Smart helps preserve structures by allowing trapped humidity to escape during the drying-out phase – then acting as a traditional AVCL once structures are dry and moisture levels have stabilised. It also provides an effective barrier in winter.

Suitable for a Range of Applications
This advanced product is made with DuPont™ Typar^® and is suitable for a wide range of applications requiring superior vapour resistance, including:

• Renovation from the outside, on sheathing, over rafters
• As an airtight layer in above-rafter insulation systems
• Flat or pitched roofs with vapour-closed waterproofing (i.e., where moisture can only escape to the interior)
• New (timber) construction
• All-purpose dry lining applications
• Retaining insulation between rafters or wall framing.
• Wall systems (masonry, insulated timber or steel frame structures)

Important: Tyvek® AirGuard^® Smart is not suitable for structures with permanently high humidity levels, such as saunas.