Product innovations at WNL: Introduction of WNL TEX™ and roof system improvements

At WNL, quality and innovation are at the core of everything we do. Over the past months, several improvements have been implemented in the WNL roof system, aimed at simplifying installation and further enhancing system reliability.

20 | 01 | 2026

WNL TEX™: stronger and more reliable

Several years ago, WNL transitioned from the 4.2x16 BP2 screw (also known as the Arie-Tec) to the 4.2x16 SP. We are now taking the next step with the introduction of the 4.8x20 SP and 4.8x20 SP with sealing washer, exclusively developed for WNL.

The WNL TEX™ screw is a specially engineered stainless-steel screw with a split point (SP), designed for fastening into thin steel such as sandwich panels. Thanks to the unique split point, the screw displaces the material instead of drilling into it, resulting in a much stronger hold in the roof structure and a significantly reduced risk of stripping. This leads to a demonstrably lower risk of leakage and a more robust connection. Extensive testing has confirmed these improvements.

WNL TEX™ is available in two versions: without a sealing washer for ridge applications, and with a sealing washer for gutter covers, ensuring a watertight seal in all critical roof details.

Wider WNL gutter profile for renovation projects

The new WNL gutter profile has been widened, making it compatible with an even broader range of steel gutters, including the widely used AC220 gutter. This enhancement makes the WNL gutter profile highly suitable for renovation projects, such as replacing glass roofs with sandwich panel roofs. Where additional extension profiles were previously required to properly insulate the gutter, the renewed WNL gutter profile now offers a complete solution.

Shorter Gutter Covers Based on Panel Width

In addition, updated gutter covers are now available with a length of 4,394 millimetres, based on four roof panels with a width of 1,100 millimetres. Combined with the new screw positions, these shorter covers provide increased allowance for thermal expansion and contraction. In regions with large temperature fluctuations and on long roof spans, this offers a clear functional advantage.

WNL Easyjoint™: faster, stronger and cleaner Installation

These innovations integrate seamlessly with our patented WNL Easyjoint™ system, which enables fast, reliable and clean connections between roof panels without the use of sealants. WNL Easyjoint™ ensures a neat finish, minimises installation errors and allows optimal thermal movement. In combination with WNL TEX™, this results in a roof system that is not only stronger and safer, but also significantly faster and easier to install.

Installers value this combination for its time savings, ease of use and consistent quality, while clients benefit from a durable, robust and future-proof roofing solution.

More Information and Contact

For more information about these innovations, please contact WNL Sales:

E-mail: sales@westnederland.eu
Phone: +31 (0)174 523 273