Glass mineral wool delivers thermal and acoustic insulation benefits and is available in a range of rolls, batts and slabs

Glass mineral wool insulation provides thermal insulation and acoustic performance benefits across floors, walls, and roofs. Available in a wide range of rolls, batts, and slabs, it’s used to help create comfortable, energy-efficient, and well-insulated buildings.

Take a closer look at the benefits of glass mineral wool

There are advantages to choosing glass wool insulation, such as thermal insulation and acoustic performance. Let’s look at some of the core elements.

Thermal insulation

The small pockets within the mineral wool structure trap air, which is a poor conductor of heat, and significantly reduces heat transfer, making mineral wool an effective thermal insulator. Used as part a system to provide thermal insulation, glass mineral wool can help to improve thermal efficiency and reduce overall energy costs.

Acoustic performance

The non-continuous structure of the glass fibres that make up glass mineral wool impede the passage of sound. This can be used in systems to reduce airborne sound transmission and improve acoustic insulation when installed in accordance with the manufacturer’s system installation guidance. For our system information, please refer to the British Gypsum Whitebook system selector.

Reaction to fire

A significant number of our Isover glass mineral wool products achieve Class A1 reaction to fire to BS EN 13501-1, this is the highest level of performance. Please check Declaration of Performance for individual product’s reaction to fire classification.

Independently certified indoor air comfort

Our Isover UK structural and technical insulation ranges achieve the highest Eurofins Comfort Gold standard for indoor air quality

Ease of install

Compressed into rolls, slabs, batts and pipe sections, glass wool can be used across a variety of applications. Features such as friction-fit or pre-cut versions can support ease of installation.

Glass mineral wool is a recyclable building material

Our Isover glass wool products manufactured in the UK contain 82% recycled glass. This is a combination of 52% externally sourced recycled glass and 30% internally sourced glass cullet.

Manufactured using renewable energy

All the electric equipment in our UK Runcorn plant is powered by 100% renewable electricity.

Applications of glass mineral wool

Glass mineral wool is widely installed as loft insulation to improve thermal insulation. It’s also extensively used in dry-lining systems, friction-fitted within stud walls or partition walls to provide both acoustic performance and thermal insulation. Added to this, glass mineral wool is applied as roof insulation, floor insulation, and cavity wall insulation, which makes it a highly versatile material for improving comfort and energy efficiency in buildings.

Our glass mineral wool delivers thermal insulation, airborne sound insulation and is certified Class A1 reaction to fire performance. It can be used in a variety of applications such as dry lining systems, internal cavity walls, floors and loft at joist level.

Get to know glass mineral wool insulation better with these articles written by our development teams and insulation specialists.