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Wood Wool Cement Board (WWCB) ) is a versatile building material made from wood wool (excelsior) and cement.
The world wide acceptance of WWCB proves its versatility in applications and its durability in any climatic condition.
The main characteristics are:
A major application of WWCB in developing countries is durable, energy efficient Economic Housing.
Fire resistance
WWCB has been tested and classified B1 (fire resistant) according to the German DIN 4102 standard.
Wet and dry rot resistance
Because the wood wool has been mineralized by the cement, moisture loses its effect on the board.
The boards are used for interior and exterior applications and in moist conditions such as ceilings in indoor swimming pools
Termite and vermin resistance
Tests have proven that WWCB is not vulnerable to attack by termites or vermin, nor is WWCB subject to any biological decay.
Thermal insulation
Because of its relatively low density, WWCB has good thermal properties. The maximum thermal conductivity for boards of 25 mm thickness is 0.090 W/mK.
For 2- or 3-layer composite panels, the thermal conductivity will not exceed 0.040 W/mK, when a core of respectively rigid foam (e.g. polystyrene) or mineral fiber has been applied.
Acoustic performance
Unfinished (or spray-painted) WWCB has very good acoustic absorption properties since the open surface structure allows for a high level of sound absorption.
Finishes
Wood Wool Cement Board accepts all kinds of conventional rendering, plastering, decorative materials and mastics. Acoustic ceilings can be spray- or roll-painted
to retain the acoustic properties of the board.
The following Wood Wool Cement Boards are common:
By adding an additional Clamping Press to the WWCB production line, also EltoBoard can be produced on the same production line.
Standard dimensions and density of WWCB
Length: 2000mm/2400mm/2440mm/8', optionally up to 3000mm
Width: 600mm/610mm (2')
Thickness: 15mm, 25mm, 35mm, 50mm, 75mm, 100mm
| Max. Board densities in accordance with DIN 1101*: | 15 mm | 570 kg/m³ |
| 25 mm | 460 kg/m³ | |
| 35 mm | 415 kg/m³ | |
| 50 mm | 390 kg/m³ | |
| 75 mm | 375 kg/m³ | |
| 100 mm | 360 kg/m³ | |
| *(Note: DIN 1105 has recently been replaced by the new European norm EN-13168) |
