Benefits of the Bio Twin Wall System

High performance, low carbon, fully certified

Future-ready, low-carbon and mortgage-compliant

Our Bio Twin Wall System breaks down barriers to sustainable construction. Built with timber and plant-based insulation, it achieves exceptional thermal performance and fire safety without the need for a masonry outer skin. With BOPAS accreditation, lenders approve our system, giving you the freedom to build truly sustainable homes without compromise.

Why choose this system

KEY BENEFITS

Fire Certified

Tested to REI 60 from both sides, giving full assurance for Building Control and on-site safety requirements.

BOPAS-accredited

Our Bio Twin Wall System is fully approved for lenders, insurers and warranty providers.

Sustainable

Manufactured using timber and insulated with UK-grown hemp (alternatives available), designed to store more CO₂ than emitted during production and transport.

Design Flexible

Compatible with a wide range of cladding options - including timber, render, brick and composite finishes.

Start building smarter With Bio TWIN Wall

Two men examining a computer screen displaying a wood design, engaged in discussion about the project.

Yes, the system is fully BOPAS-accredited. This gives lenders, insurers, and warranty providers confidence in the durability, design life and performance of the structure.

The system has been independently tested to achieve REI 60 fire resistance from both internal and external faces. This exceeds Building Regulation requirements for two-storey housing and provides robust protection during the on-site construction phase.

Yes, the Bio Twin Wall is designed to work with a wide range of external finishes, including timber cladding, render systems, masonry, and modern composite panels.

Absolutely. Wall panels are designed for flexibility and are tailor-made to suit the project, available in various shapes and sizes for manual installation when needed. This approach can be particularly beneficial for single-storey buildings, as it reduces reliance on heavy machinery, potentially lowering costs and being more sustainable. Additionally, it simplifies logistics on sites with restricted access.

The system is built for the next wave of regulation. The proposed Part Z amendment to UK building regulations is likely to introduce mandatory whole life carbon assessments. While initially targeting larger projects, this regulation is likely to trickle down to smaller domestic projects in the future, making low-embodied carbon solutions more widespread.

The government’s Future Homes Standard is reforming Building Regulations Part L to deliver “zero-carbon-ready” homes and is actively exploring how embodied carbon should be measured and reduced across new housing. 

What this means for you

  • Lower embodied carbon by design — biogenic timber structure with UK-grown hemp insulation that stores carbon while cutting upfront emissions. 
  • Ready for whole-life carbon reporting — BIM-based models and clear material schedules to support whole-life carbon assessments (aligned with industry guidance behind Part Z). 
  • Zero-carbon-ready performance — precision offsite manufacture to meet the forthcoming Future Homes Standard fabric and efficiency aims, while minimising site waste. 
  • Mortgage-compliant without masonry — BOPAS-accredited system removes the traditional lender barrier that pushes masonry outer skins, enabling truly low-carbon envelopes.

Yes, with U-values exceeding Passive House minimum standards, airtight construction to potentially reach 0.6 ACH, and in-house support for PHPP modelling and Carbon LCA assessments, the Bio Twin Wall System is ideally suited for projects aiming to meet net zero or Passive House standards.

Digital, from design to delivery

This system is fully integrated into your workflow. We provide BIM models using Autodesk Revit, linked directly to our CAD/CAM machinery for precision cutting and consistent quality. Augmented reality support helps visualise on-site installation in real time.