What is Woodwool shuttering?

What is Woodwool shuttering?

Woodwool is a man-made board material about 50 to 75mm thick comprising shredded timber bound together in a cement paste. Woodwool boards were used both as a permanent shuttering to flat slabs but also as a void former between concrete ribs.

Is wood wool a deleterious material?

The term ‘deleterious materials’ is a broad one, encompassing not only materials that are dangerous to health or which are the causes of failures in buildings, but increasingly, materials which are environmentally damaging.

What is a wood wool slab?

Woodwool slabs are building boards suitable for carrying lime or clay renders and plasters. They’re made from mineralised wood, making the building board breathable “vapour permeable”, rot resistant and durable. Woodwool slabs come in 600 x 1200mm sheets and are available in 15mm or 25mm thicknesses.

What wood is used for wood wool?

Production. Excelsior is cut from “bolts” (round, halved, quartered, or otherwise split logs) of poplar (for example aspen), pine, spruce or eucalyptus. For evaporative cooler pads, the dominant source is the aspen. Wood wool can be produced in either horizontal or vertical shredding machines.

Is wood wool safe?

There is a variety of packing materials on the market, such as wood wool and shredded paper, that are very practical and safe for hampers, fruit, wine, and even fresh produce like lobsters and crayfish.

Which material is most deleterious?

Asbestos
Asbestos – Asbestos is the most written about deleterious material; Please see our other blogs for information on asbestos hazards and management.

Is wood wool breathable?

Warmshell Class A Boards Woodwool insulation boards for external wall insulation are the breathable, fire resistant option for insulating your walls.

What is wood wool cement board?

Wood Wool Cement Board (WWCB) is a versatile building material made from wood wool and cement where each fiber is coated with a thin film of Ordinary Portland Cement (OPC) that, when cured, partly petrifies the wood. In that way the fiber will last indefinitely as long as the cement film is not damaged.

Why is wood wool called Excelsior?

Excelsior means higher, better, superior. Excelsior is derived from the Latin word excelsus, meaning high, elevated, lofty. Excelsior is often used as a name for products to indicate high quality.

Is PIR insulation banned?

Insulation and CLT A ban on all materials except those with an A1 or A2 rating would prevent the use of insulation products such as EPS [polystyrene], phenolic and PIR (polyisocyanurate) in building façades.

Can woodwool shutters be used as a permanent shutter?

Unfortunately, when woodwool was incorporated as a permanent shutter, unless great care was taken when placing concrete against the woodwool soffit shutters, inadequate compaction of the concrete could occur due to the compressible nature of the board.

What is woodwool made of?

Woodwool is a man-made board material about 50 to 75mm thick comprising shredded timber bound together in a cement paste. It was used generally during the 1960s to provide insulation often at roof level and as a permanent shutter to in-situ concrete.

How thick is a woodwool board?

Woodwool boards were used both as a permanent shuttering to flat slabs but also as a void former between concrete ribs. The ribs were 75mm wide, 220mm deep and at 390mm centres, spanning between a central spine beam and the building edge beams. The woodwool beneath the ribs was about 30-40mm thick.