Ravatherm 145mm XPS 300 SL Flat Roof Board

145mm Ravatherm XPS 300 SL is a premium extruded polystyrene (XPS) thermal insulation board engineered for inverted flat roofs throughout the UK, including green roofs, brown roofs, and blue roof systems. This product delivers outstanding thermal performance with a declared thermal conductivity of 0.031 W/m·K, ensuring excellent energy efficiency for your building envelope.

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

Available in thicknesses ranging from 50 mm to 200 mm, these XPS insulation boards suit diverse commercial and residential flat roofing requirements, whether for new construction or renovation work.

Key Benefits

• Brand: Ravago
• Model: 145mm Ravatherm 300SL
• Thickness: 145mm
• Board Length: 1250mm
• Board Width: 600mm
• Pack Quantity: 3
• Board Coverage: 0.75m2
• Pack Coverage: 2.25m2
• Thermal Conductivity: 0.031W/mK
• R-Value: 4.70m2K/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 insulation performance for flat roof systems
2. Compatible with green, brown, and blue roof configurations
3. Low environmental impact through reduced GWP
4. Meets UK building energy efficiency requirements
5. Comprehensive thickness options (50–200 mm)

Ravatherm 145mm XPS 300 SL boards are extensively utilised across the UK for roofing, flooring and wall applications. With over 65 years of XPS insulation manufacturing experience, Ravatherm is based in King's Lynn, Norfolk.

Utilising advanced extrusion technology, Ravatherm 145mm XPS boards incorporate a closed-cell structure and smooth extrusion skin that provides exceptional strength and long-term durability. The range includes multiple thicknesses and compressive strengths, featuring innovative low-GWP CO₂ and HFO blowing agent technology.

Enhance your building's thermal performance with 145mm XPS 300 SL, the preferred solution for UK flat roof insulation schemes.

Info

Explore our full range of Ravatherm Extruded Polystyrene Insulation products. We deliver across the entire UK Mainland. For product suitability advice, project specifications, or bulk pricing enquiries, contact us on 02038839057 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.