75mm Sundolitt XPS 300 Insulation Board

75mm Sundolitt XPS 300 (300kPa) Insulation Board is a robust, rigid extruded polystyrene XPS insulation board engineered for high-moisture and demanding applications. Perfectly suited to 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 a closed-cell XPS structure, 75mm Sundolitt XPS 300 delivers outstanding water resistance, moisture protection and frost durability. Unlike conventional insulation products, it resists rain, snow and sustained damp exposure, maintaining consistent thermal performance throughout its lifespan. This makes it particularly valuable for exposed or below-ground work.

Lightweight and straightforward to handle, 75mm Sundolitt XPS 300 insulation boards can be trimmed on-site using standard tools. The material stays stable and simple to fit even in harsh weather, offering flexible storage and installation without any loss of performance.

Featuring 300kPa compressive strength, Sundolitt XPS 300 delivers a practical, low-maintenance option for applications demanding strong load-bearing properties. It is widely used in solid floors, foundations, industrial flooring, cold stores and chilled storage, plus domestic and commercial ground floor insulation schemes.

Key Benefits

1. Brand: Sundolitt
2. Model: 75mm XPS300 Sundolitt
3. Thickness: 75mm
4. Dimensions: 1,200mm x 600mm x 75mm
5. Length: 1200mm
6. Width: 600mm
7. Board m2: 0.72m2
8. Pack m2: 3.6m2
9. Board Weight: 2.48kg / board
10. Pack Weight: 8.93kg
11. Density: 33kg/m3
12. Compressive Strength: 300kPa
13. Tensile Strength: ≥ 600
14. R-Value: 2.2m2K/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 75mm XPS insulation board is also an excellent solution for basement insulation and below-ground construction, including installations below the water table. Its closed-cell design guarantees long-term thermal efficiency and structural stability even in groundwater-exposed or persistently damp environments.

Engineered for contemporary construction and civil engineering requirements, 75mm Sundolitt XPS 300 insulation boards provide exceptional thermal performance, durability and flexibility in the toughest conditions.

XPS 300 Sundolitt Insulation Applications – UK Construction & Civil Engineering

Sundolitt XPS 300 (300kPa) insulation boards offer broad versatility across UK construction, civil engineering and industrial sectors. Primary applications include:

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, superior thermal performance and moisture resistance, Sundolitt 75mm XPS 300 is suited to demanding UK applications where durability and sustained performance matter.

Info

Browse our full range of Sundolitt XPS Insulation products. We deliver across the entire UK Mainland. To discuss product suitability for your scheme, request a quantity discount quotation, call 02038839057 / 02038839057, email sales@insulationbee.co.uk or use Live Chat for the best UK insulation prices near you.