Minimum order £500.00 Ex-VAT - Delivery Vehicle Access: 28 ton curtain-sided lorry off-load requirement.

    Shopping Basket

Isover SpaceSaver Loft Roll - Cold Roof Insulation

Isover Spacesaver 0.043W/mK Loft Roll Insulation

Isover Spacesaver is a low density glass mineral wool roll supplied in 100-200mm thickness’s. The strong, resilient and flexible rolls are pre-perforated to 3x386mm and 2x580mm widths to fit between common joist spacing.

Isover Spacesaver Loft Roll is a general purpose glass mineral wool with an improved thermal conductivity of 0.043W/m.K that are suitable for providing thermal insulation in domestic-type pitched roofs, and are supplied in ready-cut widths to suit normal roof joist spaces.

The strong, resilient and flexible mats are supplied compression packed and are easy to cut and install.

Product Price List and / or Add to Cart

Availability: Popular product readily available throughout the country.

Isover Spacesaver Loft Roll - Glass Mineral Wool - Unfaced roll - 40 Rw dB sound reduction

1. Click items below for pricing structure. 2. Click Tick-Box to select one or more items. 3. Click Add to Cart Button.

Common product, generally held by all depots Isover Spacesaver 100mm, 1.16x12.18m = 14.13m² - start at £32.95
Common product, generally held by all depots Isover Spacesaver 150mm, 1.16x8.05m = 9.34m² - start at £34.53

Our Prices are currently being revised please contact us for the latest prices

Common product, generally held by all depots Isover Spacesaver 200mm, 1.16x5.2m = 6.03m² - start at £29.17

Price and Availability Advisory

Presently there are no availability restrictions. Always observe the 'Star Rating' indicators to assess availability.

Product availability indicators

Excellent = Product Availability Excellent Good = Product Availability Good Fair = Product Availability Fair Poor =  Product Availability Poor Undetermined = Product Availability Undetermined
Availability relies on stock levels at closest depots and upon transport logistics to effect deliveries

Isover Spacsaver Loft Roll (0.044W/mK)

Isover Spacesaver Loft Roll 43, and Isover Acoustic Partition Roll

Isover Spacesaver rolls are high quality thermal insulation mats in roll form, perforated along the roll to allow the user the choice of full, half or third width options from a single roll.

These insulation rolls that are suitable for providing thermal insulation between and above ceiling joists in domestic-type pitched roofs.
Spacesaver provides widths of 386mm, 580mm and 1160mm from a single roll, due to its pre-cut perforations


  • Thermal performance: Declared Thermal conductivity (lD) of 0.044 W/mK. Provides excellent thermal performance, reducing heat loss within the building envelope.
  • Non-combustible: Isover glass mineral wool insulation has an A1 Euroclass fire rating – the best attainable.
  • Recycled content: Manufactured from up to 86% recycled post-consumer glass that would otherwise go to landfill.
  • Protected planet: Zero Ozone Depletion Potential (ODP) and Global Warming Potential of less than 5.


    Fitting Isover Acoustic Roll 1200 into a stud partition
  • All Isover products are manufactured under BS EN13162:2012 and 13172:2012 for factory made mineral wool products.
  • Isover Spacesaver has a declared thermal conductivity of 0.044 W/mK.
  • Fire
  • Euroclass A1 fire rating when classified to BS EN13501-1.
  • Class ‘O’ Compliance.


  • All Isover products are manufactured under Environmental Management System – ISO 14001:2004.
  • Zero ODP (Ozone Depletion Potential), GWP < 5 (Global Warming Potential).
  • The manufacturing process does not use or contain CFC’s, HCFC’s or other damaging gases.
  • BRE statement Isover Spacesaver corresponds to the BRE Global Green Guide online generic specification ‘Glass wool insulation - density 10 kg/m³’ ref 815320005 which achieves a summary rating of A+ within Domestic, Health, Industrial, Commercial, Retail, Education.
  • NB: The density stated above is part of a generic BRE classification and does not reflect the exact specification of the product.


  • All Isover products are manufactured under Quality Management Standard – ISO 9001:2008.
  • Isover Spacesaver is manufactured under BS EN13162:2012 and BS EN13172:2012 (Thermal insulation products for buildings - Factory made mineral wool (MW) products).

Recycled content

  • Isover glass mineral wool insulation is manufactured from up to 86% recycled glass that would otherwise go to landfill. This makes Isover one of the most environmentally sustainable insulation products on the market today.


  • No change in reaction to fire properties for mineral wool products.
  • The fire performance of mineral wool does not deteriorate with time.
  • The Euroclass classification of the product is related to the organic content, which cannot increase with time.
  • Thermal conductivity of mineral wool products does not change with time, experience has shown the fibre structure to be stable and the porosity contains no other gases than atmospheric air. (See std EN13162:2012 Annex ZA,Table ZA.1)
  • Will not accelerate corrosion with steel, copper or aluminium.
  • Will not sustain vermin, nor breed or promote fungi or bacteria.

Handling and storage Isover products are supplied fully palletised, offering the following benefits:

  • Weatherproof packaging for outside storage
  • Reduced haulage costs
  • Less handling therefore less damage
  • Reduced storage space
  • Packs remain clean and in good condition
  • Faster loading, unloading and counting

Technical Details

Product Thickness (mm) Width (mm) Length (mm) Pallet Area (m²) Pack Area (m²) Units Per Pallet lD, Declared Thermal Conductivity (W/mK) RD, Declared Thermal Resistance, (m2K/W)
Spacesaver - 100mm 100 1160 9170 255.36 10.64 24 0.044 2.3
Spacesaver - 150mm 150 1160 6030 167.76 6.99 24 0.044 3.45
Spacesaver - 170mm 170 1160 5390 150 6.25 24 0.044 3.95
Spacesaver - 200mm 200 1160 3880 108 4.5 24 0.044 4.65

Product Information and Certification

Links to manufacturer's information. Click to download in a separate browser window.

Isover SpaceSaver Loft Roll Datasheet | Isover Loft Insulation Guide | Isover Spacesaver Declaration of Performance


  • CE marked (1121-CPR-BA0053) to BS EN 13162:2012 and BS EN 13172:2012.
  • Designation Code: MW EN13162 T1.

Priced on Application:

Generally, Products are readily available

Estimates for large quantity orders can be priced on application. Please contact us to discuss such matters.

Contact us directly for further information: Telephone 0333 8000 828  - Email: Click Here:

Contact Manufacturer

Saint-Gobain Isover

Isover Spacesaver Loft Roll and APR1200 Acoustic Partition Roll

Gotham Road, East Leake, Loughborough, Leicestershire, LE12 6HX

Structural insulation - Technical enquiries

Telephone: +44 (0) 115 945 1143
Web sites: Isover Home Page

Contact us

Insulation Online Limited

Sales Office only:39 Normandy Road, Worthing, West Sussex, BN14 7DX, UK

Telephone: 0333 8000 828


Web site: - we always deliver top quality products, competitive pricing and an efficient caring service