Thermafleece NatraHemp Insulation

 Thermafleece NatraHemp is a medium density natural insulation made with 60% hemp fibres, providing a durable, safe and eco friendly alternative when plant fibre insulation is preferred. Designed to fit securely between rafters, joists and studs, it delivers excellent thermal and acoustic performance, making it ideal for walls, roofs and floors.

With a density of 28 kg/m³, NatraHemp not only improves heat retention but also helps reduce airborne sound transmission. Like all Thermafleece natural fibre products, it is long lasting, non irritant and safe to handle without protective equipment. Plus, hemp naturally helps regulate moisture, contributing to a healthier indoor environment.

Key Benefits of NatraHemp Insulation

• Thermal Efficiency - thermal conductivity of 0.042 W/mK, helping to reduce heat loss and cut energy bills.
• Excellent Acoustic Insulation - achieves Class A sound absorption at 70mm and 100mm.
• Sustainable Choice - made from renewable hemp fibres with 37.5% recycled content; recyclable at end of life.
• Carbon Reducing - hemp absorbs and stores CO₂ during growth, reducing environmental impact.
• Durable and Long Lasting - lofting agent ensures fibre stability and product integrity over decades.
• Safe and Easy to Install - harmless to touch, no protective clothing required, lightweight and flexible to fit securely.

Technical Specifications

Performance:

• Thermal Conductivity: 0.042 W/mK
• Density: 28kg/m³
• Vapour Resistivity: 9MN·s·g–1m–1
• Water Absorption (@100% RH): 17% w/w
• Specific Heat Capacity: 1800 J/kgK
• Fire Performance: BS 5803-4 (Pass)
• Acoustic: EN 11654:1997 - Class A @70mm and 100mm
• Embodied Energy: 10MJ (net of non fossil feedstock energy)
• Recycled Content: 37.5%
• Recyclable: Yes

Sizes Available:

• Thickness: 50mm, 70mm, 100mm
• Widths: 370mm and 570mm
• Length: 1200mm

Accreditations:

• Manufactured to ISO 9001 and 14001 standards

Installation and Handling

• Can be installed without gloves or protective clothing (dust mask recommended in enclosed spaces)
• Suitable for use with a vapour permeable membrane for optimum moisture regulation.
• Protect from prolonged sunlight exposure and avoid long term wetting.
• If insulation becomes wet during storage or flooding, replace affected material.
• Not suitable as a cavity barrier - install fire and cavity barriers where required.
• For best cutting results: compress insulation between two 15mm boards and cut with a scalloped knife.

Thermafleece NatraHemp is the perfect choice for those seeking a natural, sustainable and high performance insulation that improves comfort, reduces energy bills and helps protect the planet.