Isover Spacesaver glass mineral wool roll Isover Insulation

Isover Spacesaver

A lightweight economical glass mineral wool insulation blanket.

Suitable for use in pitched and flat cold roofs and suspended timber floor applications.

Achieves a Euroclass A1 Reaction to Fire classification, according to BS EN 13501-1.

Does not sustain vermin, nor will it breed or promote fungi and/or bacteria growth.

The rolls are pre-perforated to 3x386mm and 2x580mm widths.

Isover Spacesaver glass mineral wool insulation is manufactured from up to 75% recycled glass.

Thicknesses and Availability:

Available in most popular thicknesses at most depots; short lead-times may apply if we need to get stock in before delivering to site.

This Spacesaver Range includes the following readily available product thicknesses: 100mm, 150mm, 170mm and 200mm.

Product Information

General information about Isover Spacesaver

Product Application

Glass mineral wool insulation blanket

Isovers glass mineral wool insulation, Spacesaver, is suitable for use in cold pitched and flat roofs, solid masonary walls, timber and steel framed systems, and floors.

Product Make-up


Isover Spacesaver is manufactured from sand, recycled glass, limestone and soda ash, span into long strands before being bound and compressed into matted layers with zero ozone depletion potential (zero ODP) and low global warming potential (GWP).


Unfaced as standard, however, we may be able to supply polyencapsulated rolls on request, depending on requirements.

Product Properties

Thickness 100mm to 200mm
Roll Length 5.2m - 12.18m (dependant on thickness)
Roll Width 1.16m

Product Prices

Buy Isover Spacesaver

Product ex-VAT inc-VAT
Isover Spacesaver 100mm, 1.16x12.18m = 14.13m² £31.46 £37.75
Isover Spacesaver 150mm, 1.16x8.05m = 9.34m² £31.14 £37.36
Isover Spacesaver 170mm, 1.16x7.03m = 8.15m² £30.86 £37.03
Isover Spacesaver 200mm, 1.16x5.2m = 6.03m² £26.65 £31.98

Reasonable stock levels are generally held at most of our depots. In some geographic locations, depots may stock alternates, however, we will contact you to discuss before proceeding with the order.

  • Generally 1 or 3 working days for delivery
  • Generally 1 to 5 working days for delivery
  • Generally 5 to 10 working days for delivery
  • Special request or made to order item, allow extended lead times. Minimum order levels may apply.
  • Please call to check availability and approximate lead times

Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations

Product Performance and Guides

Product Performance, Manufacturer Downloads, and Installation Guides

Product Performance

Thermal Conductivity 0.044 W/mK
Nominal Density approx. 10 kg/m²
Product Thickness Thermal Resistance kg/m²
Isover Spacesaver 100mm 100mm 2.25 m²K/W 1 kg/m²
Isover Spacesaver 150mm 150mm 3.40 m²K/W 1.5 kg/m²
Isover Spacesaver 170mm 170mm 3.85 m²K/W 1.7 kg/m²
Isover Spacesaver 200mm 200mm 4.50 m²K/W 2 kg/m²

Standards & Approval

Isover Spacesaver is manufactured under Environmental Management System – ISO 14001. Zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP) > 5. The manufacturing process does not use or contain CFC’s, HCFC’s or other damaging gases. BES 6001 Rating “Good” - The Framework Standard for Responsible Sourcing.

Isover Spacesaver corresponds to the BRE Global Green Guide online generic specification glass wool insulation ref 815320005. All products achieve a summary rating of A+ within the Domestic, Health, Industrial, Commercial, Retail and Education categories.

Isover Spacesaver is manufactured under Quality Management Standard – ISO 9001 and in accordance with BS EN 13162: Thermal insulation products for buildings. Factory made mineral wool (MW) products.