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Glass Mineral Wool

Glass mineral wool is made from sand and recycled glass, limestone and soda ash.

These are the same ingredients that are used to make familiar glass objects such as window panes or glass bottles.

The glass is spun to form millions of fine fibres.

A resin is used to bind the fibres together to form a mat of material.

Characteristics

Long fibre, giving good tear strength

Suitable for temperatures up to 230°C

Non-combustible

Lightweight

Available in rolls and slabs

Main uses

Loft Insulation

Cavity wall insulation

Wall cladding

Sound insulation (absorption) within partitions and floors

Examples

Earthwool® Loft Roll 44 Combi Cut

is an ‘unfaced’ loft insulation products designed for merchants and distributors to stock in a range of thicknesses prior to distribution to end user customers.

Even when stocked for several months it will recover to its manufactured thickness when unrolled.

Earthwool® Rafter Roll 32 is an unfaced, semi-rigid roll of glass mineral wool with extra high thermal performance for between rafter insulation.

When unrolled and cut to length, Earthwool® Rafter Roll 32 behaves much like a slab and is therefore perfect for friction fitting between rafters.

Earthwool® Rafter Roll 32

is an unfaced, semi-rigid roll of glass mineral wool with extra high thermal performance for between rafter insulation.

When unrolled and cut to length, Earthwool® Rafter Roll 32 behaves much like a slab and is therefore perfect for friction fitting between rafters.

Earthwool® Acoustic Insulation Rolls

Utilising the acoustic insulation properties of Earthwool® glass mineral wool

With the excellent acoustic insulation properties of glass mineral wool, a range of specialist sound reducing insulation products are available for use in new build separating walls, partitions, and floors, as well as for the upgrade of existing buildings to provide improved sound insulation and resistance.

Rockwool Cladding Roll

Specially developed for use in lightweight cladding applications to satisfy the thermal, fire and acoustic requirements of roofs and walls.

These products are manufactured in a variety of thicknesses to suit the needs of virtually any applications to framed buildings of a commercial or industrial nature.

 

Which to choose, Slab or Roll?

The density of the product determines whether the insulation is a lightweight quilt supplied in rolls, a flexible slab or a rigid slab, and it’s thermal insulation value.

Being rigid or semi rigid, slabs have the advantage of better thermal and acoustic values; firmness; strength; and density.

Insulation rolls are easily and quickly installed, and offer flexibility when there are pipes and wiring between rafters and joists.

Rock or rock mineral wool

Composition

rock mineral wool is primarily made from volcanic rock, typically basalt or dolomite, or a combination of the two.

Increasing a significant proportion is now recycled material from slag, a waste product from blast furnaces. The materials are melted and then spun into fine fibres.

A resin is used to bind the fibres together to form a mat of insulation.

Characteristics

Short fibre - compressive strength

Suitable for temperatures up to 850°C Non-combustible

Denser than glass mineral wool

Available in the form of slabs, rolls and mattresses

High compressive strength

Main uses

Thermal insulation of ...

pitched roofs, flat roofs, and ceilings

external wall thermal insulation

interior wall thermal and acoustic insulation

sound insulation for floors and walls

rainscreen façades

Fire protection, including smoke and fire barriers

High temperature applications

Insulation Slabs, Batts, and Rolls

These insulation products resist the transfer of heat, by relying on pockets of trapped air or gas within its structure and its thermal resistance is consistent regardless of the direction of heat flow through it.

They include materials such as glass and rock mineral wool, cellulose fibre, and rigid plastic insulation boards.

All of these products have a specific thermal resistance for a given thickness of material at a given temperature.

 

Manufacturers that we predominantly support

Knauf Insulation Ltd, PO Box 10, Stafford Road, St Helens, Merseyside, WA10 3NS
Technical Advisory Tel: 01744 766666 Fax: 01744 766667 Email: tech@knaufinsulation.com

Saint-Gobain Isover UK, East Leake, Loughborough, Leicestershire LE12 6JU
Tel: 0115 945 1050 - Fax: 0115 945 1915 - E-mail isover.enquiries@saint-gobain.com

Rockwool Limited, Pencoed, Bridgend, South Wales, CF35 6NY United Kingdom
Tel: 01656 862621 - Fax: 01656 862302 - Email: info@rockwool.co.uk