DUPONT TYVEK BREATHER MEMBRANES & AIRGUARD AVCL'S
DUPONT™ TYVEK® BUILDING KNOWLEDGE CENTRE
BRISTOL & BATH SCIENCE PARK
DIRAC CRESCENT, EMERSONS GREEN
NORTH SOMERSET BS16 7FR
Tel: 0117 970 9454/9455/9456
Suppliers of: Breather membranes, roofing membranes, roofing underlays, cladding membranes, facade breather membranes, wall breather membranes, AVCL membranes, air & vapour control layers, air tight vapour barriers, vapour control layer for roofs, tyvek breather membr
DuPont™ Tyvek® and AirGuard® Building Envelope Systems
As an innovative supplier of proven building envelope systems, DuPont™ Tyvek® offers a full range of high-performance membranes and accessories to help prevent air and moisture infiltration and improve energy efficiency in all building types.
Used together, Tyvek® breather membranes and AirGuard® Air and Vapour Control Layers (AVCLs) create a durable, holistic building envelope solution. They are designed to meet current sustainable building requirements and are backed by DuPont, the experts for quality materials and sustainable building practices.
Contact Tyvek: Please use the following link to contact us about your project: Click Here
Tyvek® Breather Membrane Solutions
Breather membranes play a key role in protecting buildings and occupants from the elements. Investing in a quality solution like DuPont™ Tyvek® can help provide long-term building protection – and peace of mind too.
Take building protection to the next level with DuPont™ Tyvek® FireCurb® breather membrane (previously called FireCurb® Housewrap) – a fire retardant membrane with the benefits of a Tyvek® breather membrane.
DuPont™ Tyvek® Housewrap is a vapour-permeable breathable membrane for walls that provides moisture protection for timber, steel and concrete walls.
Tyvek® Metal roofing underlay allows condensation to drain away beneath standing seam metal sheet roofs and improves overall airtightness.
DuPont™ Tyvek® Reflex is a heat reflective membrane that can help improve thermal efficiency in wall systems by reflecting 91% of radiant heat in summer, and reducing convective heat loss in winter.
Tyvek® StructureGuard™ is a durable, lightweight breather membrane for walls that is windtight, water-resistant and ideal for use with timber frame systems.
Tyvek® Supro is the market-leading breather membrane, and is a water resistant membrane suitable for all supported and unsupported pitched roof applications in commercial and residential buildings.
DuPont™ Tyvek® UV Facade provides optimum protection from UV, wind and moisture, and is a proven choice for use in open rainscreen cladding systems.
Tyvek® AirGuard®: Vapour Control Layer Solutions
Tyvek® AirGuard® air and vapour control layers (AVCLs) are 100% airtight. This helps to reduce convective heat loss and provide effective condensation control for all building types.
A fire retardant AVCL with European Fire Classification A2. Tyvek® AirGuard® A2 FR enhances the building fabric in terms of airtightness, energy efficiency and moisture management, improving indoor air quality and providing exceptional fire safety to the building and its occupants.
Tyvek® AirGuard® Reflective is a low emissivity internal vapour barrier that combined with an airgap can enhance thermal comfort by reflecting up to 95% of radiant heat back into the building.
Tyvek® AirGuard® Smart is a strong and lightweight flexible AVCL that can adapt its performance to changes in humidity levels during and after construction to provide superior airtightness and effective condensation control.
Tyvek® AirGuard® Control is a tough, transparent vapour control barrier that improves airtightness by reducing convective heat loss and air leakage while also minimising the risk of condensation in roof and wall insulation.
Tyvek® sealing tape is specifically designed to complement Tyvek® breather membranes and AirGuard® AVCLs. It helps to seal the building envelope – for optimal airtightness, long-term performance and durability.
4 New adhesive accessories:
High performance airtight tape that is extremely flexible and hand-tearable. Its high tack sticks to smooth or rough surfaces such as PE films, spun-bond, wood or PVC. It is especially recommended where difficult shapes need to be sealed, such as corners, edges, etc.
High performance airtight and moisture adaptive carrier tape that can be rendered. It seals difficult areas like windows, doors and timber to block connections. Suitable for internal and external application.
Cartridge sealant for bonding of AirGuard® vapour control layers to various solid construction surfaces to achieve an airtight seal. Also, suitable for joint filling and ideal for use in confined areas where an adhesive tape is difficult to apply, such as corners of windows and doors.
Transparent primer that is permanently tacky after curing and with very fast curing time. It is recommended for porous surfaces to create a good adhesion.
DuPont™ Range of Adhesive Tapes:
Single-sided Tyvek® acrylic tape with or without a split-release liner. It seals Tyvek® membranes as well as AirGuard® membranes with proven performance.
Double-sided acrylic tape for bonding Tyvek® membranes and to provide a temporary fixing of AirGuard® vapour control layers.
High performance flexible self-adhesive flashing tape to create an airtight and water tight seal around windows, doors, chimney breasts, pipe penetrations and any custom shapes.
Single-sided metallised Tyvek® tape to seal Tyvek® and AirGuard® metallised membranes.
Double-sided butyl based tape used to form a moisture and airtight seal between a Tyvek® membrane or an AirGuard® vapour control layer and most commonly used building materials.
Further Technical Information is available to download from the BPi Download Library.
DuPont Tyvek A Proven Alternative to Multi-Layer Breathable Roofing Felt
A Proven Alternative to Multi-Layer Breathable Roofing Felt
Roof underlays are often exposed to high temperatures – especially on buildings with a metal roof. Over time, this can significantly impair their water resistance – as can direct exposure to UV during construction. Since both factors can lead to a functionality loss of the second water shedding of the underlay leading to rot, mold, mildew, it is essential to choose a solution that has been proven to withstand both hazards effectively.
In a comprehensive ageing test commissioned by DuPont, Tyvek® breathable membranes outperformed multi-layer breathable roofing felts on both counts. The test programme, conducted by the SP Technical Research Institute of Sweden, found that DuPont™ Tyvek® breather membranes can still give effective watertight protection even after exposure to direct UV and sustained high temperatures.
During construction work, roofing underlays are often exposed to harmful UV for long periods, when roofs and walls are not covered quickly enough, or if completion is delayed. This exposure can dramatically reduce the watertightness of roofing felts.
Objective: To determine the watertight performance of Tyvek® breathable membranes after direct UV exposure.
All roof breather underlays have been subjected to direct UV, then tested to ensure their continued water resistance to class W1.
Microscopic pictures from microporous films of multi-layers breathable roofing felt after ageing
Tested underlays functional layers comparison
Prolonged exposure to high temperatures can impair the watertightness of conventional multi-layer roofing underlays, leading to mold, mildew and other potential threats. Metal roofing is particularly prone to heat build-up, so particular care is required here when choosing the right solutions for long-term performance.
Objective: To determine the watertight performance of Tyvek® breathable membranes after heat exposure (90°C).
All roof breather underlays have been subjected to heat exposure of 90°C (above the CE requirement of 70°C) and then tested to ensure their continued water resistance to class W1.
Results: Again, Tyvek® demonstrated high durability and significantly superior resistance to temperatures of 90°C.
In Tyvek®, DuPont has created products that can withstand high levels of UV and heat exposure without losing their protective quality. This means choosing Tyvek® not only optimizes energy efficiency in all building types, but also gives proven durability and long-term protection.
High-Quality Functional Layer
The secret of Tyvek® breathable membranes lies in their unique structure. The highly durable functional layer is six to eight times thicker than most multi-layer roofing felts, and consists of heat- and UV stabilized polyethylene (PE) for reliable, long-term performance and UV/heat resistance – something competitor products cannot always guarantee.
DuPont Tyvek® Underlay for Proven Long-Term Performance
Tyvek® Underlay for Proven Long-Term Performance
The demand for vapour-open membranes has grown strongly in the last fifteen years, leading to a highly competitive market filled with different underlay players and technologies.
Today’s breathable roofing underlays play a vital role in high-quality pitched roof and wall constructions, where they take care of windproofing, vapour breathability and waterproofing. To protect your investment in the long term, however, it pays to choose proven products that will function reliably throughout their entire lifecycle. After all, one leaking roof membrane is all it takes to render the entire roof structure ineffective, leaving the building and its interior vulnerable to damage from water ingression.
As a result, more and more professionals now specify quality solutions from the name they trust: DuPont™ Tyvek®.
Functional Layers: Quality and Thickness Are Critical
The thickness and the quality of the functional layer in an underlay are what determine its durability (secondary water shedding function) during construction work, and afterwards. The functional layer of DuPont™ Tyvek® is approx. six to eight times thicker than the microporous layer of most common multi-layer membranes.
Ageing Damage Factor in Underlays
A key factor that determines how watertight underlays will be in the long term is their ability to withstand the ageing processes caused by UV radiation and high temperatures.
Exposure to UV radiation often occurs during construction, when breathable membranes are left uncovered for longer periods. Prolonged exposure to high temperatures can also impair watertightness; this frequently occurs with metal roofing, which is more prone to heat build-up.
Tyvek® Outperforms Multi-Layer Breathable Roofing Underlays
In a comprehensive ageing test conducted by the Independent SP Technical Research Institute of Sweden, DuPont™ Tyvek® breathable membranes outperformed all the multi-layer breathable underlays that were tested. The test programme concluded that even after exposure to direct UV and sustained high temperatures, Tyvek® membranes can still provide years of effective watertight protection.
During the tests, which were performed according to EN 13859 regulations, all breathable underlays were subjected to direct UV, and their continued water resistance was then tested to class W1.
Tyvek® demonstrated higher durability and significantly superior resistance to UV exposure.
Next, all breathable underlays were exposed to temperatures of 90°C (above the CE requirement of 70°C), and their continued water resistance was tested to class W1. Again, Tyvek® demonstrated high durability and superior resistance.
Durable Condensation Protection
Thanks to their highly durable functional layer, Tyvek® underlays not only safeguard watertightness over the long term. By ensuring durable windproofing and vapour breathability, they also protect surfaces and structures better against condensation than tested multi-layer breathable underlays.
So by combining Tyvek® and AirGuard® solutions, it is possible to create structures that are extremely energy efficient – and will stay that way for years to come.
You can read more on the long-term durability of DuPont™ Tyvek® in our Proven Alternative to Most Common Multi-Layer Breathable Roofing Felt article.