Sundolitt XPS 300 100mm Insulation Board

100mm Sundolitt XPS 300 (300kPa) is a rigid extruded polystyrene XPS insulation board engineered for high-performance applications in moisture-prone conditions. Ideal for inverted roofs, flat and zero-pitch roofs, green roof systems and ground-bearing installations where strength, durability and sustained thermal performance are paramount.

Built with closed-cell XPS technology, this board delivers superior water resistance, moisture protection and frost durability. Unlike conventional insulation materials, it resists rain, snow and sustained damp exposure, maintaining consistent thermal efficiency throughout its operational lifespan. This makes it particularly valuable for exposed or subterranean applications.

Lightweight and straightforward to work with, 100mm Sundolitt XPS 300 insulation boards can be trimmed on-site using standard tools. The material remains dimensionally stable and simple to fit even in challenging weather, offering flexible storage and installation without performance loss.

Delivering 300kPa compressive strength, Sundolitt XPS 300 provides an economical, minimal-maintenance option for applications demanding substantial load-bearing performance. Typical uses include solid floors, foundations, industrial flooring, cold storage and chilled facilities, plus domestic and commercial ground floor insulation schemes.

Key Benefits

1. Brand: Sundolitt
2. Model: 100mm XPS300 Sundolitt
3. Thickness: 100mm
4. Dimensions: 1,200mm x 600mm x 100mm
5. Length: 1200mm
6. Width: 600mm
7. Board m2: 0.72m2
8. Pack m2: 2.88m2
9. Board Weight: 3.3kg / board
10. Pack Weight: 9.5kg
11. Density: 33kg/m3
12. Compressive Strength: 300kPa
13. Tensile Strength: ≥ 600
14. R-Value: 2.94m2K/W
15. Thermal Conductivity: 0.033 W/mK
16. Material: Extruded Polystyrene (XPS)
17. Finish: Smooth
18. Applications: High moisture environments ǀ Multi-purpose
19. Features: Closed-cell rigid thermal XPS insulation
20. Fire Performance: F

• Please click the following for a single board: Buy a single Sundolitt XPS 300 board

This high-strength 100mm XPS insulation board is particularly suited to basement insulation and below-ground construction, including installations beneath the water table. Its closed-cell composition guarantees enduring thermal efficiency and structural stability in groundwater-exposed or persistently damp environments.

Engineered for contemporary construction and civil engineering requirements, 100mm Sundolitt XPS 300 boards deliver exceptional thermal performance, longevity and adaptability in the harshest conditions.

XPS 300 Sundolitt Insulation Applications – UK Construction & Civil Engineering

Sundolitt XPS 300 (300kPa) boards are exceptionally flexible and appropriate for numerous UK construction, civil engineering and industrial applications. Primary uses encompass:

1. Car parks, airports, runways, roads, and motorways
2. Civil engineering projects and large-scale infrastructure
3. Solid flooring and foundation insulation for domestic and commercial buildings
4. Industrial floors, cold stores, and chilled storage facilities
5. Inverted roof systems, flat or zero-pitch roofs, and green roof applications
6. External wall insulation systems below DPC level
7. Below-ground insulation for floors and walls, including basements
8. Landscaping, groundworks, and large void fill projects

Engineered to deliver high compressive strength, outstanding thermal performance and moisture resistance, Sundolitt 100mm XPS 300 suits demanding UK environments where performance reliability and durability matter.

Info

Explore our full Sundolitt XPS Insulation range. We deliver across the entire UK Mainland. For project suitability advice or bulk pricing requests, contact us on 02038839057 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.