Isover is part of the leading group Saint-Gobain. Founded in 1937 Isover has over 80 years of experience and has grown to become one of the top manufacturers in Insulation’s materials. Isover now has over 10,000 employees within 107 countries.
Saint-Gobain ISOVER creates efficient thermal and acoustical insulation solutions to design energy-efficient constructions, to provide safe comfort for users, and to help protect the environment.

Showing 1–16 of 25 results

Isover Spacesaver 44 Roll
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100mm Isover Spacesaver Loft Insulation – 14.13m2 Loft Roll

£32.69 ex VAT
Isover 34 Cavity Wall Slabs
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125mm Isover Cavity Wall Slabs 34 (CWS 34) – 1200 x 455mm – 65.6m2 pallet

£904.19 ex VAT
Isover 34 Cavity Wall Slabs
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150mm Isover Cavity Wall Slabs 34 (CWS 34) – 1200 x 455mm – 65.6m2 pallet

£1,010.69 ex VAT
Isover Spacesaver 44 Roll
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150mm Isover Spacesaver Loft Insulation – 9.34m2 Roll

£32.69 ex VAT
Isover Spacesaver 44 Roll
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170mm Isover Spacesaver Loft Insulation – 8.15m2 Roll

£34.34 ex VAT
Isover 36 Cavity Wall Slabs
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100mm Isover Cavity Wall Slabs 36 (CWS 36) – 1200 x 455mm – 6.55m2 pack

£39.94 ex VAT
Isover Spacesaver 44 Roll
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200mm Isover Spacesaver Loft Insulation – 6.03m2 Roll

£32.69 ex VAT
Isover 34 Cavity Wall Slabs
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100mm Isover Cavity Wall Slabs 34 (CWS 34) – 1200 x 455mm – 87.4m2 pallet

£904.19 ex VAT


  • More than 70% of Isover glass wool production waste is recycled which prevents landfilling.
  • Glass wool is fully recyclable.
  • Glass wool is made of up to 90% recycled glass
  • Isover launched the first closed-loop recycle service for construction and demolition glass wool waste in France.
  • Stone wool is made up of 30% recycled stone wool waste.
  • Stone Wool products are made from 97% Volcanic Raw Materials.

What is Isover:

Isover provides a range of high-performing insulation solutions that are used to insulate countless homes, buildings, and transportation applications all over the UK. Thousands of professionals choose Isover to provide great performing insulation while being energy efficient.

Isover aims to create a balanced thermal environment by using insulation to create an airtight envelope around the building, together with mechanical or natural ventilation which will help control the indoor thermal environment. Providing the correct insulation in your residential or commercial building can save up to 30% on your yearly heating or cooling bill.

Isover products includes acoustic roll, loft roll, and cavity wall insulation. See the product range below.


Isover uses Mineral wool to produce several insulation products. Mineral Wool is a material that traps in the air, making it one of the most effective insulation materials and is used by builders all over the UK. The porous and elastic composition of the wool can also absorb noise adding an acoustic advantage to the building. Mineral wool is a hard-wearing material and does not fuel fire or generate flames. Their products are used to form rolls, slabs, pipe selections, and loose wool.

Isover produces 3 types of mineral wool:

  • Glass wool, made mainly from sand and recycled glass.
  • Stone wool, made mainly from volcanic rock.
  • Mineral Wool / Ultimate Mineral Wool, mainly made from either fibre of stone and slag wool or slag and stone.


Isover Spacesaver Loft Roll:

Isover Spacesaver Loft Roll is a high-quality mineral wool insulation that comes in a roll formation. Loft rolls are used for thermal applications in the cold roof and loft floors. This product is lightweight and easy to manage, cut, and install. This Product covers 6.03m2, is water-resistant, and has a Euroclass 1 reaction to fire. Thermal conductivity 0.044W.mK.

Isover Acoustic Partition Roll:

The Isover Acoustic Partition Roll is used in partition walls and floors with sound in mind to reduce the noise traveling through your home or work environment. It is a non-combustible glass mineral wool roll which is a lightweight material making it easy to cut, manage and install. This product is made of recycled materials and is thoroughly tested to create the best quality. This product provides a non-aging lifetime performance, excellent thermal performance, and is rot-proof and fire-safe. Thermal Conductivity 0.043W.mK.

Isover Cavity Slabs:

Cavity slabs consist of a silicone glass mineral wool slab bonded with a thermosetting resin. This well-constructed Isover batt cavity wall slab is used to provide thermal insulation in the masonry cavity. It is generally installed in between the building's inner and outer leaf. This product is non-combustible, easy to cut, manage and install. It provides excellent thermal and acoustic performance and has a Euroclass A1 reaction to fire. Thermal Conductivity 0.032W.mK.

Installing Isover loft roll:

There is a variety of options when it comes to installing Isover, each method differs depending on the product being installed and the location it is being fitted in your residential or commercial building.

  • Isover is most installed in lofts between rafters in the roof.
  • Be sure to follow any guidelines provided when buying Isover products.
  • It is important to use protective clothing such as goggles or safety glasses when cutting Isover as these products can cause irritation to the skin and eyes.
  • A Stanley knife and a tape measure/ ruler are essential tools when insulating a loft.
  • The product should always be properly tucked into the rafters and a long object such as a broom can be helpful to get to those harder-to-reach areas to pat in the insulation.
  • Always assure you have accurate measurements, and the insulation rolls or slabs are tightly butted together at the joins to create an airtight space.


Saint-Gobain is a company that designs and makes materials and distributes goods. With Saint-Gobain dating back to over 350 years, it now has 180,000 employees with over 100 nationalities. Saint-Gobain is everywhere when it comes to our living and working spaces, transportation, and buildings. It can be found in many industrial uses and provides safe and reliable products meanwhile focusing on climate change and supporting sustainable construction and resource efficiency.

Saint-Gobain’s main brands include Celotex and British Gypsum.

BS EN13162:2012
BS EN13172:2012
BS EN ISO 9001:2000
ISO 9001:2008
ISO 14001:2004
Fire Rating: Euroclass A1
BS EN13501-1. Class 'O' compliance
A+ rating according to Bre Green Guide