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.
9mm Cembrit Windstopper Extreme Facade Board (1200mm x 2400mm - 2.88m²) is an external sheathing fibre-cement based building board with a 60/60 fire rating (class A2-s1), an ideal solution for exterior walls used as a temporary cladding.
Windstopper Extreme by Cembrit is a non-combustible, vapour..
4.5mm Cembrit Windstopper Extreme (1200mm x 2400mm - 2.88m²) is a guaranteed and tested fire and weather resistant breathable external sheathing board with A2 fire protection class that features a windproof membrane for exterior walls.
Windstopper Extreme by Cembrit is a non-combustible, vapour p..
Cembrit Windstopper Extreme 4.5mm x 1200mm x 2700mm is a breathable fibre-cement external sheathing board with a 60/60 fire rating and A2 fire protection class, dust-free easy installation and is ideal as a temporary cladding.
Windstopper Extreme by Cembrit is a non-combustible, vapour permeable ..
Cembrit Windstopper Extreme 9mm x 1200mm x 2700mm is a lightweight breathable fibre-cement external sheathing board with a 60/60 fire rating and dust-free easy installation and is ideal as a temporary cladding for exterior walls.
Windstopper Extreme by Cembrit is a non-combustible, vapour permeab..
Cembrit 4.5mm Windstopper Extreme (1200mm x 3000mm) is a special type of fibre-cement weather resistant breathable external sheathing board with A2 fire protection class that features a windproof membrane for exterior walls.
Windstopper Extreme by Cembrit is a non-combustible, vapour permeable ce..
9mm Windstopper Extreme Fire Resistant External Sheathing Board (1200mm x 3000mm) is a vapour permeable fibre-cement based building board with a 60/60 fire rating, an ideal solution for exterior walls used as a temporary cladding.
Windstopper Extreme by Cembrit is a non-combustible, vapour permea..