40mm Soprema SOPRAXPS 300 SL FN XPS Board

40mm Soprema SOPRAXPS 300 SL FN is a premium rigid extruded polystyrene (XPS) insulation board engineered for demanding UK construction projects requiring superior compressive strength and moisture protection. Delivering 300kPa compressive strength, this board provides robust thermal insulation performance under heavy structural loads.

Manufactured to 1250mm x 600mm x 40mm dimensions, Soprema XPS 300 SL suits diverse commercial, industrial and specialist construction settings. Typical uses encompass solid floors, underground structures, basements, car parks, swimming pools, cold storage areas, and both flat and pitched roof systems.

In contrast to standard EPS (expanded polystyrene) insulation, which typically achieves around 70kPa compressive strength, Soprema SOPRAXPS 300 SL FN provides substantially greater load-bearing capability. This positions it as an excellent choice for high-traffic zones and structural applications where durability and performance matter.

Key Benefits

1. Brand: Soprema SOPRAXPS 300 SL FN (Previously Soprema SL)
2. Model: 40mm XPS 300
3. Thickness: 40mm
4. Weight: 12.00kg
5. Dimensions: 1,250mm x 600mm x 40mm
6. Board Length: 1250mm
7. Board Width: 600mm
8. Pack of: 10
9. Board Coverage: 0.75m2
10. Pack Coverage: 7.5m2
11. Weight: 12kg
12. Density: 35kg/m3
13. R-Value: 1.25m2K/W
14. Thermal Conductivity: 0.032 W/mK
15. Compressive Strength: 300kPa
16. Material: Extruded Polystyrene
17. Edge Profile: Rebated edge
18. Surface: Smooth
19. Reacting to fire: F
20. Applications: Garage, Car parks, Roof, Floor, Basement
21. Features: High quality ǀ Waterproof ǀ Rigid XPS
22. Manufacturer: SOPREMA

Key Features

• Moisture-Resistant
• Shiplap (SL) Edges
• High Compressive Strength
• Closed-Cell XPS Foam Core

The board incorporates a rebated edge design to enhance thermal continuity and minimise cold bridging effects. Its closed-cell XPS construction delivers exceptional water, moisture and frost resistance, maintaining consistent thermal performance in damp or subterranean environments. This 40mm Soprema XPS insulation is manufactured using climate-friendly CO₂ technology, promoting sustainable construction practices across the UK.

For inverted roof applications, including zero-fall and flat roofs, 40mm Soprema SOPRAXPS must be installed with ballast to guarantee stability and sustained performance.

Meeting contemporary UK building standards, 40mm Soprema SOPRAXPS 300 SL FN insulation boards deliver exceptional strength, longevity and thermal efficiency for diverse construction and civil engineering applications.

Info

Browse our full range of Soprema XPS Insulation products. We deliver across the entire UK Mainland. To discuss product suitability for your project or request a quantity discount quotation, contact us on 02038839057 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.