DuPont™ Tyvek® Delivers Durable Protection in Coastal Anglesey Build

Trearddur Bay, located on the scenic northwest coast of Anglesey, is one of North Wales’ most desirable seaside destinations. When an older property was demolished to make way for a new, detached home with stunning coastal views, DuPont™ Tyvek® was the membrane of choice -selected to protect both the Huws Gray timber frame and the roof from the region’s harsh weather conditions.

DuPont™ Tyvek® specialists supported the project with U-value calculations for the timber frame walls, condensation risk analysis, and  wind uplift guidance for the roofing underlay, leading to the correct choice of membranes to meet the conditions of the highly exposed Welsh coastline.

The construction team aimed to enhance the building’s performance, longevity, and interior comfort. To achieve this, they specified a combination of DuPont™ Tyvek® Supro for the roof, Tyvek® Reflex for the walls, and AirGuard® Reflective as the AVCL membrane. These high-performance solutions safeguard the building envelope while significantly improving thermal efficiency throughout the structure’s lifespan.

Tyvek® Supro, known for its durability and ease of handling, is one of the most robust roofing underlays available. Independent testing confirms that its unique functional layer continues to perform reliably more than 20 years after installation.

DuPont™ AirGuard® Reflective, a metallised air and vapour control layer (AVCL), is 100% airtight and prevents internal moisture from compromising the building envelope. Its highly reflective low emissivity surface further enhance thermal performance.

Tyvek® Reflex, a vapour-permeable, windtight, and W1 water resistant membrane, is ideal for timber frame and vertical cladding applications. It allows moisture to escape from the structure while shielding it from external elements. Its uniquely lacquered, low-emissivity surface prevents oxidation, ensuring long-term performance.

Jan McVey, of JCM Construction stated, “This combination of airtight, lightweight, and easy-to-install membranes not only protects the building envelope but also significantly enhances thermal performance—improving interior comfort and reducing the carbon footprint.”

He added, “We’re proud to have delivered a high-quality build that meets the environmental demands of the Anglesey coast.”