100mm Soprema Sopraxps 300 SL FN XPS board

100mm Soprema SOPRAXPS 300 SL FN Insulation Board is a high-performance, rigid extruded polystyrene (XPS) insulation solution designed for technically demanding UK construction applications where high compressive strength and moisture resistance are essential. With an impressive compressive strength of 300kPa, it provides durable and long-lasting thermal insulation in areas subject to heavy loads.

Manufactured to a size of 1250mm x 600mm x 100mm, Soprema XPS 300 SL is suitable for use in a wide range of commercial, industrial and specialist environments. Typical applications include solid floors, underground constructions, basements, car parks, swimming pools, cold storage facilities, and both flat and pitched roof systems.

Compared to standard EPS (expanded polystyrene) insulation, which typically offers around 70kPa compressive strength, Soprema SOPRAXPS 300 SL FN delivers significantly higher load-bearing performance. This makes it an ideal insulation board for high-traffic areas and structural applications where strength and reliability are critical.

Key Benefits

1. Brand: Soprema SOPRAXPS 300 SL FN (Previously Soprema SL)
2. Model: 100mm XPS 300
3. Thickness: 100mm
4. Weight: 12.00kg
5. Dimensions: 1,250mm x 600mm x 100mm
6. Board Length: 1250mm
7. Board Width: 600mm
8. Pack of: 4
9. Board Coverage: 0.75m2
10. Pack Coverage: 3.0m2
11. Weight: 12kg
12. Density: 35kg/m3
13. R-Value: 3.10m2K/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 features a rebated edge profile to improve thermal continuity and reduce cold bridging. Its closed-cell XPS structure provides excellent resistance to water, moisture and frost, ensuring consistent thermal performance even in damp or below-ground conditions. 100mm Soprema XPS insulation is also manufactured using climate-friendly CO₂ technology, supporting more sustainable construction practices in the UK.

For inverted roof applications, including zero-fall and flat roofs, 100mm Soprema SOPRAXPS must be installed in combination with ballast to ensure stability and long-term performance.

Designed to meet the needs of modern UK building regulations, 100mm Soprema SOPRAXPS 300 SL FN insulation boards offer outstanding strength, durability and thermal efficiency across a wide range of construction and civil engineering projects.

Info

Have a browse of our Soprema XPS Insulation products. We supply to the entire UK Mainland. If you’d like to talk through the suitability of some products for your project, or get a quantity discount quotation please call us by phone on 02039519012 / 02038839057, email sales@insulationstoreonline.co.uk or Live Chat - Lowest UK Insulation Prices near me.