SHERA Plank BOARD Solutions
SHERA plank is a unique fibre cement composite of natural fibres bonded tightly in a high-grade silicate structure. This autoclaved wood-grain siding acquires impressive toughness, yet remains flexible and dimensionally stable. It is a cellulose cement plank that contains absolutely no asbestos fibre, no fibre glass fibres or formaldehyde.
SHERA Plank comes in two main categories:
Square cut edge (overlapping style)
These planks are more ‘traditional’ and are used in external siding applications where the planks overlap the preceding rows. These planks come in Teak or Cassia or even smooth surface profiles and the Teak surface planks also come in coloured formats, see below.
Shiplap style
The planks have various profiled edges and give a more ‘modern’ shiplap look to your siding application. Edge profiles are shown below. The shiplap range are primarily uncoloured format and can be painted pre-installation or on site, using any acrylic water based paint.
| Physical Properties | |
|---|---|
| Thickness Tolerance | +6% |
| Density | 1350 + 50 kg/m3 |
| Flexural Strength (wet avg) | > 7 MPa |
| Modulus of Elasticity (wet) | 3000 MPa |
| Water Absorption | < 35% |
| Moisture Content | < 15% |
| Water Tightness | Pass |
| pH Value | 7-8 |
| Thermal Conductivity | 0.15 W/m.K |
| Acoustic Insulation | STC = 30 dB (6 mm single board) STC = 50 – 60 dB (10 mm composite wall) |
| Moisture Movement | + 0.04% |
| Length Change Due to Water Absorption | < 0.10% |
| Fire Resistance Properties | |
| Ignitibility | Pass |
| Fire Propagation Index | I = 0.4 |
| Surface Spread of Flame | Class 1 |
| Reaction to Fire Classification | A1 |
| Combustibility | Non-Combustible |
| Durability Properties | |
| Freeze / Thaw Resistance | < 0.75 |
| Warm Water Resistance | < 0.75 |
| Heat / Rain Resistance | No cracks or structural alteration |
| Soak / Dry Resistance | < 0.75 |
| Product Classification | Category A |