The Best Of Both Worlds: Advanced Tyvek® Airguard® Smart Offers A Clever New Way To Control Both Airtightness And Moisture

The Best of Both Worlds: Advanced Tyvek® AirGuard® Smart offers a clever new way to control both airtightness and moisture

Healthy construction (Left) Mould damage because of trapped moisture (Right) 


Now the complex needs of the modern building envelope can be met by a product that is both simple to work with and ingenious in managing multiple demands. Adaptable to varying climatic conditions, Tyvek® AirGuard® Smart is a membrane with a difference – developed by the experts in protecting structures against environmental damage while also improving thermal performance.

Wrapping the interior side of the envelope, Tyvek® AirGuard® Smart acts as a highly efficient air and vapour control layer (which easily achieves below Passive house levels of airtightness) but has also been formulated to adapt to rising humidity conditions and so allow any trapped, or unplanned, moisture to escape towards inside of the building.

This clever variation allows faster evacuation of built-in humidity in new construction elements (e.g.: wet rafters). It also means avoiding humidity infiltration from living spaces into the building’s structure, thereby minimising the risk of expensive damage from damp and mould, thus being the standard function of an AVCL.

With an impressive variable water vapour resistance range of sd value 0.2m for a humid environment (1 MNs/g) to more than sd-value 35m, for dry environment (175 MNs/g), Tyvek® AirGuard® Smart offers advantages from reduced drying out time for constructors to enhanced energy efficiency and comfort for the building owners.


Easy application also allows for continuous installation of the AVCL from the outside, without risking condensation to the upper side of the rafters and, uniquely, the product can be fitted to both flat and pitched roof constructions, with a high resistance underlay.

With all the reliability and great service to be expected of a product under the Tyvek® brand, Tyvek® AirGuard® Smart also comes with clear and detailed installation guidelines and the technical back-up of the Tyvek® Building Knowledge Centre.