By continuing to use the site you agree to our Privacy & Cookies policy

Your browser seems to have cookies disabled. For the best experience of this website, please enable cookies in your browser.


Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.


DuPont launches DuPont™ AirGuard® Smart

A new AVCL membrane contributing to efficient and sustainable building solutions. The next-generation vapour control layer adapt to changes in humidity levels, delivering superior airtightness and offering the widest vapour resistance span known in the market.

In response to the growing requirements for improved energy performance in buildings, DuPont Building Innovations launches a new vapour control layer for optimal airtightness in the building envelope, offering excellent adaptability to changes in humidity levels, thanks to the widest vapour resistance span (0.26 MNs/g to more than 150 MNs/g), on the market.  DuPont™ AirGuard® Smart further extends the existing AirGuard® product range, suitable for both roof and wall applications. This innovative airtight membrane, developed for new build and refurbishment projects and specifically designed for renovating roofs from the exterior, will be available from April 2012.

“DuPont™ AirGuard® Smart is a new, effective solution that delivers superior performance in terms of moisture management through its capacity to “behave smartly” according to weather conditions, relative air and insulation humidity” explains Karel Smolders, DuPont Building Innovations, Marketing Manager Building Envelopes for Europe Middle East and Africa.

DuPont™ AirGuard® Smart has superior properties thanks to the extreme span of sd-values from 0,05m to more than 30m (or expressed as vapour resistance: 0.26 MNs/g to more than 150 MNs/g) which allows maximum protection against structural damage. It adapts to changes in humidity levels and minimises or increases the water vapour transmission rate, as needed. It combines a drying-out and vapour control function in one layer. Due to its high mechanical properties DuPont™ AirGuard® Smart outperforms most of its competitors. Its robustness and transparent appearance offers easy and trouble-free installation.

DuPont™ AirGuard® Smart has been especially designed to work as an airtight layer for renovating roofs from the exterior. Applications include above rafter insulation or between rafter insulation, but it can be also used in dry lining applications from the inside.

Technically, DuPont™ AirGuard® Smart demonstrates excellent performance: the vapour resistance is always below 5 MNs/g if the insulation is very wet, regardless of ambient air relative humidity. The construction and insulation can dry out to the inside, as well as to the outside via the Tyvek® breather membrane. Very high relative ambient air humidity should additionally be reduced through ventilation and extraction.  DuPont™ AirGuard® Smart acts as a typical vapour control layer if the insulation is very dry: It provides a vapour control effect with a high vapour resistance.  Diffusion occurs via the external breather membrane, thus the construction and insulation can dry out to the outside. These features make it an ideal solution for energy saving requirements and contribute to cost reductions related to heating or cooling.

In the summer, when the ambient air relative humidity is high (>50%), the outside temperature is higher than inside so the water vapour resistance of DuPont™ AirGuard® Smart is low and water vapour can, if necessary, migrate to the inside, so that the insulation and construction can dry out.

While in the winter, the ambient air relative humidity is much lower with an outside temperature lower than inside. In this case, DuPont™ AirGuard® Smart water vapour resistance is high and helps block water vapour diffusion, so that less humidity can ingress to the insulation and construction.

Technical data

MaterialDuPont™ Typar® with a moisture regulating film and additional spun bond
Product designation acc. to EN 13984Type B acc. to EN 13984*
Roll size1.50 m x 50 m / 11 kg
Reaction to fireE
Mass per unit area139 g/m2
Water vapour transmission range (sd-value)

0,05 m (humid environment),

>30 m (dry environment),

Water vapour resistance range0.26 MNs/g for humid environment (sd 0.05m) more than 150 MNs/g for dry environment (more than sd 30m)
Temperature resistancefrom -40°C to +80°C
Maximum Tensile Force (MD/ XD)360/ 300 N / 50 mm
Resistance to tearing (MD/ XD)310/ 330 N
Air permeability (ISO 5636/3)0 ml / min (airtight)

*CE conform according to EN 13984: Plastic and rubber vapour control layers


About DuPont™ AirGuard® – DuPont™ AirGuard® products are air and vapour control layers for roofs, ceilings and walls reducing uncontrolled air leakage and heat losses.  The overall balance in drying capacity of the construction is maintained with DuPont™ AirGuard® Smart on the inside and a DuPont™ Tyvek® underlay on the outside.

About DuPont Building Innovations - DuPont™ AirGuard® is a product of DuPont Building Innovations. From innovative energy-saving systems to beautiful and long-lasting surfacing solutions, the extensive offering of DuPont Building Innovations delivers safety, durability, beauty and energy efficiency, providing a major contribution to the modern built environment - across the spectrum of building and architecture, roads, bridges and other infrastructure and also to landscaping and gardens, as well as to the preservation or the renovation of contemporary and historical constructions. The main products and brands managed by DuPont Building Innovations are DuPont™ Corian® (, DuPont™ Energain® ( DuPont™ Tyvek® (, DuPont™ Typar® ( and DuPont™ Plantex® (


About DuPont - DuPont (NYSE: DD) has been bringing world-class science and engineering to the global marketplace in the form of innovative products, materials, and services since 1802. The company believes that by collaborating with customers, governments, non-governmental organizations, and thought leaders we can help find solutions to such global challenges as providing enough healthy food for people everywhere, decreasing dependence on fossil fuels, and protecting life and the environment. For additional information about DuPont and its commitment to inclusive innovation, please visit

(#) sd = water vapour diffusion resistance – the ability of construction-materials to be permeable to water vapour

DuPont™, AirGuard®, Corian®, Energain®, Plantex®, Typar® and Tyvek® are trademarks or registered trademarks of E. I. du Pont de Nemours and Company or its affiliates.

Have your say

You must sign in to make a comment.

Related Jobs

Sign in to see the latest jobs relevant to you!

    The searchable digital buildings archive with drawings from more than 1,500 projects

    AJ newsletters