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.
32mm WHX Cementitious Self Drilling Render Board Screw (box of 200 screws) is a universal dense board fastener specifically designed to fix and self countersink in all cementitious boards and to all common base materials.
Evolution WHX Screw is a multipurpose solution, perfect for fastening cemen..
32mm WHX Cementitious Screws box of 200
Self Drilling Render Board Screws 4.2mm
Fix and self countersink in all cementitious boards
38mm STS Cember Render Board Screw (box of 250) is an external render board screw designed specifically for use with render carrier boards and fibre cement sheet materials.
Render Board Screw features an anti-corrosion coating to create a strong, weatherproof, rustproof hold, suitable for impact ..
38mm STS Cember Render Board Screws
External render board screws (box of 250)
Render carrier boards and fibre cement sheets
Strong, weatherproof, rustproof hold
Suitable for impact driver drill or standard cordless
WHX Cementitious Self Drilling Render Board Screw 42mm (box of 200 screws) is a universal dense board fastener specifically designed to fix and self countersink in all cementitious boards and to all common base materials.
Evolution WHX Screw is a multipurpose solution, perfect for fastening cemen..
42mm WHX Cementitious Screws box of 200
Self Drilling Render Board Screws 4.2mm
Fix and self countersink in all cementitious boards
Self Drilling Render Board Screw WHX 60mm (box of 200 screws) is an easy to use self countersinking board screw specifically designed to fix and self countersink in all cementitious boards and to all common base materials.
60mm Evolution WHX Screw is a multipurpose solution, perfect for fastening..
60mm WHX Cementitious Screws box of 200
Self Drilling Render Board Screws 4.2mm
Fix and self countersink in all cementitious boards
80mm Render Board Self Drilling Screw WHX Evolution is a special dense board screw specifically designed to fix and self countersink in all cementitious boards and to all common base materials.
Evolution WHX Screw 80mm is a multipurpose solution, perfect for fastening cement boards, plywood and o..
80mm WHX Cementitious Screws box of 200
Self Drilling Render Board Screws 4.2mm
Fix and self countersink in all cementitious boards
100mm WHX Cementitious Render Board Screws (200) is a high-performance corrosion resistant dense board screw specifically designed to fix and self countersink in all cementitious boards and to all common base materials.
Evolution WHX Screw 100mm is a multipurpose solution, perfect for fastening c..
100mm WHX Cementitious Screws box of 200
Self Drilling Render Board Screws 4.2mm
Fix and self countersink in all cementitious boards