Ravatherm 180mm XPS 300 SL Flat Roof Board

180mm Ravatherm XPS 300 SL is a premium extruded polystyrene (XPS) thermal insulation board engineered for flat roof applications across the UK, including green roofs, brown roofs, and blue roof systems. This board delivers outstanding thermal performance with a declared thermal conductivity of 0.031 W/m·K, providing an R-value of 5.80m2K/W.

Manufactured with environmental responsibility at its core, Ravatherm XPS 300 SL features a Global Warming Potential (GWP) of less than five, making it an excellent option for sustainable and energy-efficient building projects throughout the UK.

Available in thicknesses ranging from 50 mm to 200 mm, these XPS boards suit both new construction and renovation work on commercial and residential flat roofing systems.

Key Benefits

• Brand: Ravago
• Model: 180mm Ravatherm 300SL
• Thickness: 180mm
• Board Length: 1250mm
• Board Width: 600mm
• Pack Quantity: 2
• Board Coverage: 0.75m2
• Pack Coverage: 1.50m2
• Thermal Conductivity: 0.031W/mK
• R-Value: 5.80m2K/W
• Compressive strength@ 10% deformation: 300kPa
• Compressive Creep max after 50 years < 2% deformation under stress σC: 130kPa
• Fire Rating (Reaction to Fire): E
• Water vapour diffusion resistance factor μ (tabulated value): 100
• Temperature limits: -50/+75
• Edge Profile: Ship lap
• Surface finish: Skin

Application

• Inverted Roofs
• Green Roofs
• Roof Terraces
• Car Park Decks

Key Benefits

1. Superior thermal performance for flat roof systems
2. Suitable for green, brown, and blue roof configurations
3. Low GWP rating for environmentally conscious projects
4. Meets UK building energy standards
5. Comprehensive thickness range (50–200 mm)

Ravatherm 180mm XPS 300 SL boards are a trusted solution across the UK for roofing, flooring and wall insulation work. Based in King's Lynn, Norfolk, Ravatherm brings over 65 years of specialist XPS insulation manufacturing experience to the UK market.

Engineered through advanced extrusion technology, these 180mm XPS boards feature a closed-cell structure and smooth extrusion skin that delivers high strength and long-term durability. The range includes multiple compressive strengths and innovative low-GWP formulations using CO₂ and HFO blowing agent technology.

Enhance your building's thermal performance with 180mm XPS 300 SL, the proven choice for UK flat roof insulation schemes.

Info

Browse our full range of Ravatherm Extruded Polystyrene Insulation products. We serve the entire UK Mainland. For product suitability advice, quantity discount quotations, or technical support, contact us by phone on 02038839057 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.