Isover Spacesaver Insulation Roll is made up of a high-quality glass fibre mineral wool insulation. The rolls are manufactured with Zero ODP (Ozone Depletion Potential) and zero GWP (Global Warming Potential).
The manufacturing process does not use or contain CFCs, HCFCs or other damaging gases The product comes in roll form and is designed for thermal applications in cold roofs and loft floors. The rolls are pre-perforated at 3 x 386mm and 2 x 580mm to allow easy installation between joist centres of 400mm or 600mm. It provides a thermal conductivity of 0.44W/mK.

Showing all 4 results

Isover Spacesaver Insulation roll provides thermal insulation for cold roof constructions in both new-build, renovations, and extension projects.
Isover Spacesaver is manufactured from high quality glass mineral wool which is lightweight and make it easy to handle, cut and install. This product can be cut easily if necessary, using a Stanley blade. The Isover Spacesaver rolls are resilient to moisture damage in storage, during delivery and on-site during installation. The roll come in compressed packages which makes moving and storing the rolls conveniently. Isover Spacesaver rolls will last for as long as the building does providing, they are installed correctly.

Heat rises, by installing loft insulation you are preventing heat from escaping out of the roof of your property. This will create a more comfortable and temperature-controlled environment by providing you property with warm winters and cool summers. This also improve the properties thermal and energy efficiency. This will contribute to affecting climate change and global warming.

Isover Spacesaver Loft Roll can be installed in a range of methods including:

  • Pitched Roof – Between and Over Joists
  • Flat Roof – Between Joists
  • Ground Floor Suspended Timber – Between Joists

Safety / Product Specifications:

Length: Length varies depending on thickness.
Width: 3 x 386mm and 2 x 580mm
Thicknesses: 100mm, 150mm, 170mm, 200mm.
Thermal Conductivity: 0.044W/mK.
Facing: Glass Wool


  • ISO 9001:2008
  • BS EN13162:2012
  • BS EN13172:2012
  • ISO 14001:2004
  • Euroclass A1 Reaction to Fire classification
Thickness (mm)Thermal Conductivity (W/mK)Length (m)Width (mm)Coverage Per Roll (m2)