Nviro Launch Bio-Based Wall System for Construction
The bio-based insulation supplier Nviro and wood panel manufacturer NPI have joined forces in a new collaboration aimed at providing consultants, contractors, and builders with a documented wall system solution for the construction industry. The solution is designed to help buildings comply with the stricter CO2 emission requirements in the Danish Building Regulations, making it a key component in the transition toward more sustainable construction.
The construction industry continues to work on reducing its climate impact through product development and optimization of current solutions. Nviro and NPI are now introducing a new system-approved wall construction manual, built with readily available materials on the market. The target audience includes consultants, contractors, and carpenters looking for alternative building solutions with a lower carbon footprint.
“We’ve combined Nviro’s expertise in bio-based insulation with NPI’s strong range of wood-based structural panels to document a new, extremely simple wall system built with sustainable materials. We call it the N+N System Wall, consisting of our cellulose insulation blown into a panel structure from NPI,” says Per K. Thomsen, CEO of Nviro, and continues:
“These materials are already available at timber merchants, but together with NPI, we’ve ensured that the system wall comes with the necessary documentation for fire safety, technical performance, and climate impact. This makes it a more hands-on and practical option for builders. We can see that for many projects, this structure can help meet the stricter carbon limits set by the Building Regulations – positively impacting the project’s LCA.”
Back to the Future with Bio-Based Building Materials
The N+N System Wall by Nviro and NPI utilizes cellulose insulation and wood-based panels – materials that have been used in construction for over 100 years. Thanks to technological advances and innovative design, they can now replace more resource-intensive materials while still complying with modern building requirements. The goal is also to show decision-makers that building with bio-based materials can be both fast and cost-effective.
“Cellulose insulation and timber-based materials have been used for more than a century, but in Denmark, they’ve largely been replaced by more resource-demanding alternatives. However, with the current focus on reducing construction’s climate impact, it’s time to revisit these traditional materials and methods,” explains Per K. Thomsen.
Industry Association Kickstarted the Collaboration
The partnership between Nviro and NPI began through the newly established BFBI – the Danish Association for Bio-Based Insulation Materials, of which both companies are members. Michael Schram, co-owner of NPI, expresses great enthusiasm about the outcome of their collaboration.
“Our dialogue led to a unique solution where our wood-based panels serve as both wind barrier and vapor retarder – eliminating the need for plastic-based vapor membranes. The result is a diffusion-open wall system, which can help address indoor climate challenges in future construction,” says Michael Schram.
N+N Wall Module Structure
Exterior panel: 15 mm Egger DHF, tg4 from NPI
Insulation: ISOCELL, 65 kg/m³ from Nviro
Interior panel: 15 mm Egger OSB 3 Airtight / OSB 4 TOP from NPI
Climate Impact
GWP embedded (A1–A3): –55.4 kg CO₂ eq/m²
GWP total (A1–A3 + C3 and C4): 11.6 kg CO₂ eq/m²