Largely manufactured from recycled glass (e.g. windscreens) and mineral base materials such as sand and without the use of binding agents. The ingredients are melted into molten glass, which is cooled and crushed into a fine powder. The powdered glass is poured into molds and heated (below the melting point) in a "sintering" process that causes the particles to adhere to one another. Next, a small amount of finely ground carbon-black is added and the material is heated in a "cellulation" process. Here, the carbon reacts with oxygen, creating carbon dioxide, which creates the insulating bubbles in the (material). CO2 accounts for more than 99% of the gas in the cellular spaces.
Cellulose insulation is a material made from recycled newspaper. The paper is shredded and inorganic salts, such as boric acid, are added for resistance to fire, mould, insects and vermin. The insulation is installed either blown or damp-sprayed depending on application.
Wood fibre
The success of wood fibre insulation derives from an attractive environmental profile combined with a whole bag of functions including rigid insulation, sheathing and sarking for timber frames, roofs and flooring as well as flexible insulation for studs and rafters.
Wood of course is renewable, it sequesters carbon during its growth and product production is relatively free from pollution. The insulation value of wood fibre boards is not as dimensionally efficient as some of the orthodox petro-chemical materials - but it's no slouch either - typically coming in with a 'k value' range of between 0.038-0.043 W/mK depending on format.
Hemp
Hemp fibres are produced from hemp straw of the hemp plant. Most hemp is imported, but an increasing amount of home-grown crop is becoming available. Hemp grows up to a height of nearly 4 metres within a period of 100-120 days. Because the plants shade the soil, no chemical protection or toxic additives are required for hemp cultivation. The product is composed of, usually, 85% hemp fibre with the ballance made up of polyester binding and 3-5% soda added for fire proofing.
Straw
Straw is an agricultural by-product, the dry stalks of cereal plants, after the grain and chaff have been removed. Straw makes up about half of the yield of cereal crops such asbarley, oats, rice, rye and wheat.
The 30mm Knauf RS140 is a rock mineral wool insulation slab with an excellent class A1 fire rating to BS EN 13501-1 used in multiple thermal and acoustic applications where 140kg/m3 density is critical.
RS140 Rocksilk is manufactured with a density of 140kg/m3, designed for use in a variety of ap..
30mm x 600mm x 1200mm Knauf Rocksilk RS140 (140kg/m3)
Class A1 Non-combustible Rigid Rock Mineral Wool Insulation Slab
Fire, thermal and acoustic insulation slab used for building applications
Manufactured in 140kg density per m3 - Class ‘0’ to Building Regulations
Used in floors, roofs at rafter level, partitions, ceiling, timber & steel frame
40mm Rocksilk RS140 Knauf is an A1 class fire rated to BS EN 13501-1 rock mineral wool insulation slab designed for use in multiple thermal and acoustic applications where 140kg/m3 density is critical.
RS140 Rocksilk is manufactured with a density of 140kg/m3, designed for use in a variety of app..
40mm x 600mm x 1200mm Knauf Rocksilk RS140 (140kg/m3)
Class A1 Non-combustible Rigid Rock Mineral Wool Insulation Slab
Fire, thermal and acoustic insulation slab used for building applications
Manufactured in 140kg density per m3 - Class ‘0’ to Building Regulations
Used in floors, roofs at rafter level, partitions, ceiling, timber & steel frame
50mm RS140 Knauf Rocksilk is a non-combustible rock mineral wool insulation slab with the best possible Euroclass A1 reaction to fire classification used in multiple thermal and acoustic applications.
RS140 Rocksilk is manufactured with a density of 140kg/m3, designed for use in a variety of appl..
50mm x 600mm x 1200mm Knauf Rocksilk RS140 (140kg/m3)
Class A1 Non-combustible Rigid Rock Mineral Wool Insulation Slab
Fire, thermal and acoustic insulation slab used for building applications
Manufactured in 140kg density per m3 - Class ‘0’ to Building Regulations
Used in floors, roofs at rafter level, partitions, ceiling, timber & steel frame
75mm Knauf Rocksilk® RS140 Insulation Slab is a unique non-combustible mineral wool slab manufactured using Knauf bio-based binder ECOSE Technology with the best possible class A1 reaction to fire.
RS140 Rocksilk is manufactured with a density of 140kg/m3, designed for use in a variety of applica..
75mm x 600mm x 1200mm Knauf Rocksilk RS140 (140kg/m3)
Class A1 Non-combustible Rigid Rock Mineral Wool Insulation Slab
Fire, thermal and acoustic insulation slab used for building applications
Manufactured in 140kg density per m3 - Class ‘0’ to Building Regulations
Used in floors, roofs at rafter level, partitions, ceiling, timber & steel frame
100mm Rock Mineral Wool Knauf RS140 is an unfaced insulation slab with the best possible Euroclass A1 reaction to fire classification designed for use in multiple applications where density is critical.
RS140 Rocksilk is manufactured with a density of 140kg/m3, designed for use in a variety of ap..
100mm x 600mm x 1200mm Knauf Rocksilk RS140 (140kg/m3)
Class A1 Non-combustible Rigid Rock Mineral Wool Insulation Slab
Fire, thermal and acoustic insulation slab used for building applications
Manufactured in 140kg density per m3 - Class ‘0’ to Building Regulations
Used in floors, roofs at rafter level, partitions, ceiling, timber & steel frame