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.
6mm Kemwell WeatherKem Fibre Cement Board is an A1 class calcium silicate external sheathing board, combining weather, moisture and fire resistance properties with high impact strength and sound insulation.
The WeatherKem Sheets are BBA certified, category A weather-proof rated building boards su..
6mm Kemwell WeatherKem Fibre Cement Class A1 Board
External sheathing board for interior and exterior applications
WeatherKem is combining weather, moisture and fire resistance properties
High impact strength and sound insulation between 26dB and 44dB
Internal lining on partitions, claddings, flooring, ceilings and sheathing
8mm Kemwell WeatherKem External Sheathing Board is a calcium silicate class A1 fibre cement board, combining weather, moisture and fire resistance properties with high impact strength and sound insulation.
The WeatherKem Sheets are BBA certified, category A weather-proof rated building boards sui..
8mm Kemwell WeatherKem Fibre Cement Class A1 Board
External sheathing board for interior and exterior applications
WeatherKem is combining weather, moisture and fire resistance properties
High impact strength and sound insulation between 26dB and 44dB
Internal lining on partitions, claddings, flooring, ceilings and sheathing
Kemwell WeatherKem External Sheathing Board is a 9mm thick, A1 class calcium silicate building board, combining weather, moisture and fire resistance properties with high impact strength and sound insulation.
The WeatherKem Sheets are BBA certified, category A weather-proof rated building boards ..
9mm Kemwell WeatherKem Fibre Cement Class A1 Board
External sheathing board for interior and exterior applications
WeatherKem is combining weather, moisture and fire resistance properties
High impact strength and sound insulation between 26dB and 44dB
Internal lining on partitions, claddings, flooring, ceilings and sheathing
WeatherKem Kemwell A1 Fibre Cement Board 12mm is a strong calcium silicate external sheathing board, combining weather, moisture and fire resistance properties with high impact strength and sound insulation.
The WeatherKem Sheets are BBA certified, category A weather-proof rated building boards s..
12mm Kemwell WeatherKem Fibre Cement Class A1 Board
External sheathing board for interior and exterior applications
WeatherKem is combining weather, moisture and fire resistance properties
High impact strength and sound insulation between 26dB and 44dB
Internal lining on partitions, claddings, flooring, ceilings and sheathing
15mm WeatherKem Kemwell External Sheathing Board is a non-combustible calcium silicate fibre cement board, combining weather, moisture and fire resistance properties with high impact strength and sound insulation.
The WeatherKem Sheets are BBA certified, category A weather-proof rated building bo..
15mm Kemwell WeatherKem Fibre Cement Class A1 Board
External sheathing board for interior and exterior applications
WeatherKem is combining weather, moisture and fire resistance properties
High impact strength and sound insulation between 26dB and 44dB
Internal lining on partitions, claddings, flooring, ceilings and sheathing
Kemwell WeatherKem 18mm is a fibre cement building board, non-combustible A1 class calcium silicate sheet, combining weather, moisture and fire resistance properties with high impact strength and sound insulation.
The WeatherKem Sheets are BBA certified, category A weather-proof rated building bo..
18mm Kemwell WeatherKem Fibre Cement Class A1 Board
External sheathing board for interior and exterior applications
WeatherKem is combining weather, moisture and fire resistance properties
High impact strength and sound insulation between 26dB and 44dB
Internal lining on partitions, claddings, flooring, ceilings and sheathing
20mm Kemwell WeatherKem is a durable multipurpose A1 class calcium silicate building board used widely in construction, ideal for internal lining on partitions, claddings, flooring, ceilings and sheathing.
The WeatherKem Sheets are BBA certified, category A weather-proof rated building boards sui..
20mm Kemwell WeatherKem Fibre Cement Class A1 Board
External sheathing board for interior and exterior applications
WeatherKem is combining weather, moisture and fire resistance properties
High impact strength and sound insulation between 26dB and 44dB
Internal lining on partitions, claddings, flooring, ceilings and sheathing
25mm Kemwell WeatherKem Fibre Cement Board is an excellent A1 calcium silicate building board used widely in construction, ideal for internal lining on partitions, claddings, flooring, ceilings and sheathing.
The WeatherKem Sheets are BBA certified, category A weather-proof rated building boards ..
25mm Kemwell WeatherKem Fibre Cement Class A1 Board
External sheathing board for interior and exterior applications
WeatherKem is combining weather, moisture and fire resistance properties
High impact strength and sound insulation between 26dB and 44dB
Internal lining on partitions, claddings, flooring, ceilings and sheathing