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Ravatherm XPS X 300 SL

Ravatherm XPS X 300 SL is a flame-retardant extruded polystyrene with exceptional lambda insulation performance and a global warming potential (GWP) of less than five. It has attained a coveted Green Guide rating of A+ from BREEAM, and continues to enable the construction of energy-efficient buildings.

Ravatherm XPS X 300 SL is a high-performance, multipurpose polystyrene for the thermal insulation and frost protection of inverted flat, green and blue roofs.

It is manufactured by an extrusion process which results in homogeneous, closed cell material structure and smooth surface skin (extrusion skin) which has many favourable material characteristics.

General information
Uniclass 2015
Pr_25_71_63_29 Extruded polystyrene (XPS) boardsPrimary

J21/440 Inverted roof insulation

J41/440 Inverted roof insulation

J42/440 Inverted roof insulation

P10/135 Insulation laid across ceiling ties/ joists

P10/148 Multilayer blanket insulation fixed under or above rafters

Q37/310 Inverted roof insulation

Specification data - Extruded polystyrene (XPS) boards
Product Reference

Ravatherm XPS X 300 SL


50 mm

1.6 m²K/W thermal resistance.

80 mm

2.4 m²K/W thermal resistance.

100 mm

3.2 m²K/W thermal resistance.

120 mm

4.0 m²K/W thermal resistance.

130 mm

4.2 m²K/W thermal resistance.

140 mm

4.5 m²K/W thermal resistance.

160 mm

5.15 m²K/W thermal resistance.

180 mm

5.8 m²K/W thermal resistance.

200 mm

6.45 m²K/W thermal resistance.

205 mm

6.6 m²K/W thermal resistance.

Standard product features

Board size:

1250 x 600 mm.

Compressive strength:

300 kPa.

Edge profile:


Compressive creep (design load) maximum 2% deflection after 50 years:

130 kPa.

Fire classification:

Euroclass E.

Thermal conductivity:

  • 50 mm: 0.030 W/m·K.
  • 80–205 mm: 0.031 W/m·K

Operating temperature range:

-50°C to +75°C.

Foaming agent:

  • Hydrochlorofluorocarbon (HCFC)-free.
  • Blown with CO2 for a global warming potential (GWP) of less than five.

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