ThermaFleece UltraWool 50mm Flexible Slab

50mm Thermafleece UltraWool delivers outstanding thermal performance in confined spaces through its high-density composition and thermally bonded wool-rich fibre blend.

This premium natural insulation combines durability with superior breathability. The wool-rich formulation outperforms higher wool-content alternatives, providing the advantages of sheep's wool insulation alongside enhanced resilience and environmental credentials.

Sheep's wool functions as a natural carbon sink during growth. When installed as insulation, it actively absorbs airborne pollutants, fostering a healthier interior atmosphere. Deploying Thermafleece UltraWool substantially enhances energy efficiency and reduces heating expenditure.

As the most robust option within the 50mm Thermafleece collection, UltraWool achieves a friction fit in walls and roof cavities, amplifying both thermal and acoustic properties.

The product remains fully vapour-permeable and breathable, buffering moisture during humid conditions and sustaining a balanced, healthy building environment.

Seeking the 390mm split variant? Explore Ultrawool 390mm Split

Pack Size & Coverage

1. Thickness (mm): 50, 70, 90
2. Model: 50mm Thermafleece CosyWool Slab
3. Board size: 50mm x 590mm
4. Width: 590mm
5. Length: 1200mm
6. Items per pack: 20
7. Total coverage: 14.16m² per pack
8. Thermal Conductivity 0.035 Wm-1K-1
9. Thermal Resistance: 1.43 W/m K
10. Density: 31 kg/m3
11. Vapour Resistivity: 9 MN·s·g-1m-1
12. Highly Breathable Yes
13. Vapour open:Yes
14. Sound Reduction - Rw = 41dB
15. Made from British wool Yes
16. Made in the UK Yes
17. Contains recycled materials 20%
18. Recyclable Yes
19. Manufactured to ISO 9001 and 14001: Yes
20. Carbon Footprint PAS 20250 (60 year life): 0.50kg CO2e for R1
21. Dimensional Stability to EN 1604: Pass
22. Flammability & Smoulder Resistance (BS 5803-4): Pass

All Thermafleece British sheep wool insulation products are vapour-open and fully breathable, buffering moisture during humid periods and supporting a healthy, comfortable indoor setting.

Suitable Applications

1. Floors – Suspended ground floor & between floors
2. Lofts – Cold roofs
3. Warm Roofs – Pitched roof or attic conversions
4. Walls – Timber frame & solid (internal)

Why Choose Thermafleece UltraWool Insulation?

Installing 50mm Thermafleece UltraWool throughout your building substantially minimises thermal loss from walls, roofs, and floors, driving down energy consumption and lowering carbon output.

High Performance

Delivering a thermal conductivity rating of 0.035 W/mK, Thermafleece 50mm UltraWool ranks among the UK's leading natural fibre insulation solutions.

Cost-Effective

The energy savings generated through UltraWool deployment enable the insulation to offset its cost within several years, presenting an attractive financial proposition for property owners and construction professionals.

Long-Lasting

Thermafleece UltraWool incorporates a lofting agent that preserves fibre stability, structural integrity, and extended durability, guaranteeing consistent performance throughout your building's lifespan.

Sustainable

Derived from renewable sheep wool, UltraWool curtails CO₂ emissions by multiple tonnes across its operational life. The wool fibres inherently sequester carbon dioxide, contributing to reduced greenhouse gas concentrations and advancing sustainable building practices.

Info

Discover our complete ThermaFleece Insulation range. We deliver across the UK Mainland. To discuss product suitability for your scheme or request a volume discount quotation, contact us on 02039519012 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.