Sundolitt 50mm XPS 300 Insulation Board

50mm Sundolitt XPS 300 (300kPa) is a premium rigid extruded polystyrene XPS insulation board engineered for high-performance applications in moisture-rich settings. Perfectly suited for inverted roofs, flat and zero-pitch roof systems, green roof installations and ground-bearing projects where strength, durability and sustained thermal efficiency are paramount.

Built with a closed-cell XPS construction, this 50mm board delivers outstanding protection against water penetration, moisture absorption and frost damage. Unlike conventional insulation materials, it resists the effects of rain, snow and sustained damp exposure, maintaining consistent thermal performance over its full lifespan. This makes it especially valuable for exposed locations and below-ground installations.

Lightweight and straightforward to work with, 50mm Sundolitt XPS 300 insulation boards can be trimmed on-site using standard tools. The material stays firm and simple to fit even during harsh weather, offering convenient storage and installation without any loss of performance.

Offering a robust compressive strength rating of 300kPa, Sundolitt XPS 300 provides an economical, minimal-maintenance option for projects demanding exceptional load-bearing performance. Standard applications include solid ground floors, building foundations, industrial flooring, cold storage and chilled facilities, plus domestic and commercial ground floor insulation schemes.

Key Benefits

1. Brand: Sundolitt
2. Model: 50mm XPS300 Sundolitt
3. Thickness: 50mm
4. Dimensions: 2400mm x 600mm x 50mm
5. Length: 2400mm
6. Width: 600mm
7. Board m2: 1.44m2
8. Board Weight: 1.65kg / board
9. Density: 33kg/m3
10. Compressive Strength: 300kPa
11. Tensile Strength: ≥ 600
12. R-Value: 1.47m2K/W
13. Thermal Conductivity: 0.033 W/mK
14. Material: Extruded Polystyrene (XPS)
15. Finish: Smooth
16. Applications: High moisture environments ǀ Multi-purpose
17. Features: Closed-cell rigid thermal XPS insulation
18. Fire Performance: F

• Please click the following for a Pack: Pack of Sundolitt XPS 300 boards

This high-strength 50mm XPS insulation board performs excellently for basement insulation and subsurface construction work, including applications submerged below the water table. The closed-cell design guarantees durable thermal efficiency and structural stability even when exposed to groundwater or continuous moisture conditions.

Engineered to satisfy contemporary construction and civil engineering requirements, 50mm Sundolitt XPS 300 insulation boards deliver superior thermal performance, long-term durability and broad applicability across the most demanding scenarios.

XPS 300 Sundolitt Insulation Applications – UK Construction & Civil Engineering

Sundolitt XPS 300 (300kPa) insulation boards offer exceptional versatility across numerous UK construction, civil engineering and industrial applications. Primary uses 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 50mm XPS 300 suits demanding UK environments where durability and sustained performance matter most.

Info

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