Soprema SOPRAXPS 300 SL FN 280mm XPS Board

280mm 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 water resistance. Delivering 300kPa compressive strength, this board provides robust thermal protection in heavy-load applications.

Manufactured at 1250mm x 600mm x 280mm, Soprema XPS 300 SL suits diverse commercial, industrial and specialist uses. Common applications span solid floors, underground structures, basements, car parks, swimming pools, cold storage, and flat or pitched roof systems.

Versus standard EPS insulation (typically 70kPa), Soprema SOPRAXPS 300 SL FN delivers substantially superior load-bearing capacity. This positions it as the preferred choice for high-traffic zones and structural applications demanding proven strength and reliability.

Key Benefits

1. Brand: Soprema SOPRAXPS 300 SL FN (Previously Soprema SL)
2. Model: 280mm XPS 300
3. Thickness: 280mm
4. Dimensions: 1,250mm x 600mm x 280mm
5. Board Length: 1250mm
6. Board Width: 600mm
7. Pack of: 1
8. Board Coverage: 0.75m2
9. Density: 35kg/m3
10. R-Value: 8.45m2K/W
11. Thermal Conductivity: 0.032 W/mK
12. Compressive Strength: 300kPa
13. Material: Extruded Polystyrene
14. Edge Profile: Rebated edge
15. Surface: Smooth
16. Reacting to fire: F
17. Applications: Garage, Car parks, Roof, Floor, Basement
18. Features: High quality ǀ Waterproof ǀ Rigid XPS
19. Manufacturer: SOPREMA

Key Features

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

The rebated edge design enhances thermal continuity and minimises thermal bridging. Its closed-cell XPS structure delivers exceptional water, moisture and frost resistance, maintaining consistent thermal performance in damp or subterranean conditions. This 280mm Soprema XPS insulation employs climate-friendly CO₂ technology, supporting sustainable UK construction.

For inverted roof applications, including zero-fall and flat roofs, 280mm Soprema SOPRAXPS requires ballast installation to guarantee stability and sustained performance.

Engineered to satisfy modern UK building standards, 280mm Soprema SOPRAXPS 300 SL FN insulation boards deliver exceptional strength, longevity and thermal efficiency across construction and civil engineering schemes.

Info

Browse our full range of Soprema XPS Insulation products. We deliver across the UK Mainland. For project suitability advice or bulk quotations, contact us on 02038839057 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Competitive UK Insulation Pricing.