BIOHAUS® SYSTEM - Key Performance Targets

The BIOHAUS® system is a BOPAS-accredited, high-performance, whole-house panellised system setting the benchmark for climate-positive living. BIOHAUS® provides a structural solution for residential and public buildings up to three storeys, with further scope to develop designs for buildings up to 18 metres (five storeys).


    The encapsulated panel system offers comprehensive fire protection across all elements, ensuring a higher performance standard for the complete superstructure. The roof cassette design sets a new benchmark for timber roof systems.

  • -250kgCO2e/m2 TARGET

    Setting the standard for sustainable housing in the UK, the BIOHAUS® optimises carbon sequestration, reducing reliance on timber, with broad environmental benefits.

  • U-VALUE: 0.100W/m2K

    Solar shading and natural ventilation help achieve exceptional thermal efficiency. Creating a year-round ambient temperature enhances health and well-being without unnecessary energy use.

    Outstanding acoustic quality ensures a restful environment, protecting from unwanted sound from both indoor and outdoor sources.


    BIOHAUS® uses the whole hemp plant, only natural fibre insulation, structural timber, and limited metal fixings in its construction. Additionally, there is a significant reduction in the use of plastics and other harmful materials, aiming to minimise and, where possible, eliminate the use of toxic chemicals.

Delivering Better, Faster

  • Fast Construction

    The UK faces a housing shortage; 320,000 homes must be built annually.

    The BIOHAUS® system is constructed twice as quickly as traditional building methods. Through off-site manufacturing, BIOHAUS® reduces build time, enhances on-site safety, and minimises disruption to the surrounding area.


    Energy-efficiency is essential to protect against rising energy costs and fossil fuel reliance.

    The BIOHAUS® system is a net-positive energy home that, on average, over the year, produces more energy from renewable energy sources than it imports from external sources.


    The climate crisis demands homes be built with sustainable, low-carbon materials.

    In addition to locking up more carbon than it emits in the build phase, BIOHAUS® has an estimated -250 kgCO2e/m2, exceeding the 2030 RIBA (Royal Institute of British Architects) target for domestic housing, +625 kgCO2e/m2


BIOHAUS® homes deliver a superior living environment with systems to regulate temperature and humidity, providing a constant flow of fresh, clean air.


BIOHAUS® homes save money, staying warm in the winter and cool in the summer, reducing dependency on energy consuming heating and cooling systems.


Manufactured off-site BIOHAUS® composite hemp panels make up the superstructure, delivering a weathertight building on-site in a few days.

Finnish forest

BIOHAUS® has a minimal environmental impact, using carbon-sequestering natural materials, recycled alternatives, and low-carbon concrete.


Smart Home solutions, as standard, bring lighting, heating, door entry, music and television systems into a single app-based user interface.

BIOHAUS® Standards

HEMSPAN® is dedicated to advancing carbon removal efforts and spearheading groundbreaking innovations in construction through the cutting-edge design and performance of the BIOHAUS® System.

  • Whole-House Approach

    A complete whole-house approach that integrates health and comfort with energy efficiency and environmental performance.

  • Net Energy Positive

    A net-positive energy home that, on average over the year, produces more energy from renewable energy sources than it imports from external sources.

  • Acoustic Quality

    A quiet living environment is an important aspect of a healthy home. Noise, or unwanted sound, can cause annoyance, hypertension, stress, and impair sleep, among other things.

    The home should protect against unwanted sounds from indoor and outdoor sources.

  • Exceptional Thermal Efficiency

    A pleasant thermal environment is essential for a comfortable home. Adequate thermal comfort enhances health and well-being in both summer and winter.

    Where possible, solar shading and natural ventilation minimise overheating in summer and optimise indoor temperatures in winter without unnecessary energy use via natural ventilation wherever possible.

    Typical wall build-up delivering U-VALUE: 0.100W/m2k.

  • Negative Whole Life Emissions

    Setting the standard for sustainable housing in the UK, delivering negative whole-life carbon emissions (Target -250 kgCO2e/m2).

    Exceeding RIBA (Royal Institute of British Architects)’s target for domestic housing (+625 kgCO2e/m2 by 2030).

  • Bio Material Construction

    Only natural fibre insulation is used in construction, together with structural timber and limited use of metal fixings.

    Primary Materials:

    • Structural Timber
    • Natural Fibre Insulation
    • Bio-composites
    • Natural plasterboard alternatives


  • Non-Toxic Components & Finishes

    Minimise and, where possible, eliminate the use of harmful chemicals – such as volatile organic compounds (VOCs) – in construction.

  • Daylight

    Adequate lighting and especially well-designed daylight penetration provide various health benefits for occupants. High levels of daylight and an optimised view positively influence people’s health and well-being.

    Homes must allow for optimal daylight and attractive views outside. Electric lighting during the daytime should rarely be necessary, which should make it possible to reduce the overall energy consumption for lighting.

  • A Home That Breathes

    Incorporating intelligent systems to regulate humidity and provide a constant flow of clean, fresh air helps maintain stable and comfortable indoor temperatures. Good indoor air quality can prevent respiratory ailments and contribute to overall well-being.

  • Freshwater Consumption

    The depletion and scarcity of global freshwater resources are escalating, making it necessary to minimise water consumption and treatment in homes.

    BIOHAUS® design specifications include the installation of water-saving taps, using grey or rainwater for toilets and gardening, and employing easy-to-clean surfaces.

  • Smart Home Technology

    Smart Home solutions optimise energy performance, comfort and wellbeing.

    The BIOHAUS® standard specifies centrally managed lighting, heating, door entry, music and television systems controlled by a single app-based user interface.


The advanced technical development of the BIOHAUS® system is now complete, with full BOPAS accreditation. Factory production commences in Q3 2024.


    BOPAS Certified

  • KIWA

    UK Certification

  • Natural Carbon Solutions

    LCA (Life Cycle Assessment) and EPD (Environmental Product Declaration)

  • European CE Marking

    EU Certification


BOPAS Testing

BOPAS Testing

The BIOHAUS® System has undergone an exhaustive testing programme to attain the BOPAS Accreditation.

The Build Offsite Property Assurance Scheme (BOPAS) is a meticulous, risk-based assessment, reassuring funders, lenders, valuers, and purchasers alike that homes constructed with non-traditional methods and materials are engineered for enduring quality and longevity.

  • Fire Testing

    The BIOHAUS® system significantly exceeds minimum requirements with a 2-hour rating.

  • Acoustic Testing

    The BIOHAUS® system meets all the requirements for building regulations.

  • Thermal Testing

    The BIOHAUS® system significantly exceeds minimum requirements.

  • Hygrothermal Testing

    The BIOHAUS® system is in compliance with all standards using WUFI® Pro.

A BIOHAUS® home will initially cost approximately 10% more than a conventionally built home, but it will deliver significant savings over time.