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.
100mm Knauf Earthwool Loft Roll 44 Combi-Cut is a flexible highly-durable non-combustible glass mineral wool loft insulation roll manufactured using Knauf ECOSE Technology with Euroclass A1 reaction to fire classification used for insulation between and over the joists in cold lofts where pitched ro..
100mm URSA 10 Diverso Loft Insulation Roll is a lightweight easy to install, non-combustible, unfaced glass mineral wool loft insulation roll used as a loft insulation in cold pitched roofs.
URSA 10 Glass Mineral Wool Insulation Roll 100mm is perforated to allow it to be split into either 2 x 570..
150mm Knauf Earthwool Loft Roll 44 Combi-Cut is a highly-durable non-combustible glass mineral wool loft insulation roll manufactured using Knauf ECOSE Technology with Euroclass A1 reaction to fire classification used for insulation between and over the joists in cold lofts where pitched roofs are i..
150mm Loft Insulation Roll Glass Mineral Wool URSA 10 called loft board is an easy to install, non-combustible, unfaced glass mineral wool loft insulation roll used as a loft insulation in cold pitched roofs.
URSA 10 Glass Mineral Wool Insulation Roll 150mm is perforated to allow it to be split i..
170mm Earthwool Loft Roll 44 Combi-Cut is a flexible non-combustible glass mineral wool loft insulation roll used for insulation between and over the joists in cold lofts where pitched roofs are insulated at ceiling level.
Knauf Glass Mineral Wool 170mm (A1 Reaction to Fire) is easier to install ..
200mm URSA 10 Diverso Loft Insulation Roll is a lightweight yet tough, resilient and easy to install, non-combustible, unfaced glass mineral wool insulation roll that is used in roofs usually between or above the rafters.
Insulating pitched roofs with Ursa Loft Roll 200mm at horizontal ceiling le..
200mm Knauf Earthwool Loft Roll 44 Combi-Cut Class A1 is a flexible non-combustible glass mineral wool used for insulation between and over the joists in cold lofts where pitched roofs are insulated at ceiling level.
Knauf Glass Mineral Wool 200mm is easier to install correctly than other insulat..