Thermafleece NatraHemp 50mm x 370mm Insulation Slabs

Thermafleece NatraHemp - British Hemp Plant Fibre Insulation

Crafted from British-grown hemp, the 50mm x 370mm Thermafleece NatraHemp Insulation Slabs deliver a sustainable, reliable, and high-performing plant fibre insulation option for UK construction projects. Hemp is a rapidly renewable crop with minimal environmental footprint, yielding premium fibres ideal for insulation applications. This 50mm x 370mm variant combines British hemp fibres with thermal bonding technology to ensure long-term stability and prevent material degradation.

These slabs fit perfectly within rafter, joist, and stud cavities, delivering strong thermal performance across multiple building scenarios. With a density of 28 kg/m³, NatraHemp provides excellent sound dampening properties, minimising noise transfer through building elements. Deploying NatraHemp significantly improves thermal efficiency and reduces operational heating expenses.

Looking for the NatraHemp 50mm x 570mm variant? Check out NatraHemp 50mm x 570mm

Key Benefits

1. Model: 50mm NatraHemp
2. Thickness (mm): 50mm
3. Length: 1200mm
4. Width: 370mm
5. Pack Coverage: 21.31m²
6. Pack quantity: 48 slabs
7. Thermal Conductivity: 0.042 W/m K
8. Highly breathable: Yes
9. Vapour open: Yes
10. Sound Absorption: NRC 0.90 @100 mm
11. Made from British Hemp: Yes
12. Made in the UK: Yes
13. Contains recycled materials: 37.5%
14. Recyclable: Yes
15. Manufactured to ISO 9001 and 14001: Yes
16. Fire Protection: Self Extinguishing
17. Material: Hemp
18. Range: NatraHemp

As a plant-derived natural fibre insulation, NatraHemp presents a vegan-friendly choice for sustainable building schemes. Production occurs in Britain using domestically cultivated hemp, strengthening regional supply networks and minimising carbon footprint.

NatraHemp maintains vapour permeability and breathability, enabling it to regulate moisture levels during humid conditions and foster improved indoor air quality.

Installation & Handling

Thermafleece NatraHemp is non-toxic and straightforward to install. It causes no skin, eye, or lung irritation and requires no gloves or protective gear during application. For work in sealed or poorly ventilated spaces like roof cavities, wearing a suitable dust mask is advisable.

To preserve breathability, pair NatraHemp with a vapour-permeable membrane.

Application Instructions / How-To Use

• Establish cavity dimensions prior to fitting
• Trim batts with a utility knife, insulation saw, or hand-tear for rapid installation
• For clean cuts, sandwich the batt between 15 mm boards and cut along the excess
• Secure the insulation tightly between rafters, joists or studs for maximum effectiveness
• Use scissors or shears to remove protruding fibres
• Layer multiple thicknesses if required to achieve target U-values
• Maintain complete coverage with no voids to optimise thermal and acoustic performance

Info

Browse our complete ThermaFleece Insulation range. We deliver across the UK Mainland. For product guidance, suitability assessment, or bulk pricing, contact us on 02039519012 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Best UK Insulation Prices.