Our hemp based building insulation

  • Excellent cold protection
  • Excellent heat protection in summer
  • Healthy living: free from pollutants
  • No mould growth
  • Good soundproofing properties
  • Removes CO2 long term from the atmosphere
  • Treated for additional fire protection
  • Extremely durable
  • Circular product, can be re-processed or composted at the end of its life



85% Hemp fibres, 10% PLA reinforcement fibres, 5% fire retardant

580mm x 1200mm

Length and width



Energy saving and thermal protection

0.039w m/k

Fire protection

Class E

Carbon (net storage)

0.377kg C02 eq/Kg

Resistance to mould growth

Level 0

Max temperature for use

120 degree C

Introducing GRWNwarm, our hemp based building insulation. Sustainably grown and manufactured through the latest carbon negative processes, our insulation can help you offset the carbon footprint of your build from domestic to commercial building projects.

Find out more about how we can help you reduce your carbon emissions

The Future

GRWN Group is developing a range of natural fibre-based construction products to help decarbonise the built environment and is poised to lead the way in shaping the future of construction by championing, promoting, and bringing to fruition the buildings of tomorrow. Our use of sustainable materials can revolutionise the industry, making it more environmentally friendly and accelerate progress towards achieving the 2050 net-zero emissions goal.

Sustainable materials for a sustainable future