We have the knowledge, knowhow, expert staff and materials that will help you realise sustainable roofing, sidewall and indoor solutions (e.g. service areas).

About us


For over 15 years, we have developed, supplied and assembled innovative high-quality insulation systems for roofing and sidewall systems for buildings within the horticulture industry.

The materials and construction methods chosen for each project depend on the end user’s requirements, sustainability requirements, costs and aesthetic aspects. We’ll be happy to discuss all the pros and cons of each factor with you to help you achieve the best possible result. You can rely on us, from the early stages of the design to the practical completion of your project!

Far across the border or around the corner, a huge new construction project or just a small renovation, with our years of experience we dare to say that with vision, determination and an eye for detail we achieve a top-notch result in each project.
- Gert Hollaar - Managing Director WNL


WNL’s roofing systems are ubiquitous in the modernhorticulture industry. You can easily realize a commercial space by replacing the glass for a WNL roof system.The panels come in many different thicknesses, meaning we can provide a solution to every climatological challenge.


WNL’s efficient and sustainable sidewall systems help you give your business space a sleek and minimalist look. Thanks to the strongly insulating properties of the high-quality panels, your business space will be both comfortable and energy-efficient.


WNL's panel systems are suitable for both exterior and interior use. The high-quality finishes, as well as the many different types of panels you can choose from, will give your interiors the very look you’re after. These panels are the right choice for you if you want to conserve energy, have an efficient build and enjoy flexible applications.




Waterproof joints allow you to install roof panels without any need for sealant

Panels can be installed easily and very quickly, thus minimising assembly costs

More information

Questions? We are happy to think along with you!



High-performance insulation systems are an essential part of the energy conservation strategy implemented in high-tech greenhouses. Adding insulated sandwich panels to the roof, sidewalls and front walls, which do not require sunlight, provides significant energy savings. Production and service areas equipped with insulation panels constitute safe workspaces and storage rooms with a stable atmosphere for storage, thus reducing food wastage.

WNL puts a premium on sustainability in every respect, including the materials it uses and the way we run our business. For instance, both the foam and the metal in our panels are 100% recyclable. We always strive to reduce our carbon dioxide emissions (both our own and those of our supply chain), and we act in accordance with the principles formulated in the United Nations Global Compact.

As a BOAL Group-affiliated company, we have committed to ambitious ESG objectives. Safety, sustainability and governance are core principles to our organisation. For more information on our ESG objectives and performance, please refer to our Sustainability Report.


WNL Horti Insulation is part of BOAL Group, which has earned a Top 50 ESG (Environmental, Social, and Governance) rating among all companies worldwide. This ESG independent ranking by Sustainalytics proves our commitment to sustainable practices and places us in the top 1% of companies rated by Sustainalytics globally.

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