SHERA board – a fibre cement board with high impact strength and moisture and fire resistant properties
SHERA board is the perfect choice for building board applications such as wall cladding, wall partitioning and decorative walling. The types of buildings that are suitable for SHERA board applications are residential, commercial and industrial buildings as well as schools and hospitals; especially where speedy construction, cleanliness and hygiene is of high importance.Benefits of SHERA Fibre Cement Board:
 | - Weather resistant - Immune to water damage- Fire resistant - Provides sound insulation - Shatter resistant - Low shrinkage - Flexible - High degree of workability - Termite resistant |
Matching the Demands of Modern Applications
SHERA Board is a non-asbestos fibre-cement product composed of Portland cement, cellulose fibre and refined sand.
Using a special manufacturing process called autoclave, SHERA board acquires the strength, durability of cement and easy workability of wood as well as dimensional stability.
A non-combustible multi-purpose application fibre-cement flat board, SHERA Board comes with various thicknesses which are suitable for various applications; ceiling, wall, and floor.
It can be used for both exterior and interior applications. SHERA Boards can perfectly be calibrated and then laminated or coated with other materials, such as eg. wood veneer.
Using a special manufacturing process called autoclave, SHERA board acquires the strength, durability of cement and easy workability of wood as well as dimensional stability.
A non-combustible multi-purpose application fibre-cement flat board, SHERA Board comes with various thicknesses which are suitable for various applications; ceiling, wall, and floor.
It can be used for both exterior and interior applications. SHERA Boards can perfectly be calibrated and then laminated or coated with other materials, such as eg. wood veneer.
Standard References
| Standard | Category | Title |
|---|---|---|
| ATSM | C1185, C1186-99 | FlatNon-Asbestos Fibre-Cement sheets |
| ATSM | E90 – 97 | Sound Transmission Lost of Building Partition |
| ISO | 8336: 1993 | Fibre-Cement Flat sheets |
| AS/NZS | 2908.2: 2000 | Cellulose Cement Product Part2: Flat sheets |
| JIS | A5430 – 1995 | Fibre Reinforced Cement Boards |
| TIS | 1427 – 2540 | Fibre-Cement Flat sheets |
| EC Conformity | 12476:2004 | Fibre-Cement Flat sheets |
Building Material Class
SHERABoards are 'non-combustible' and correspond to materials in building material class A2-s1, d0 (s1 = no smoke, d0 = no combustible drips), in accordance with EN13501-1.
Applications
| Size (mm) | Thickness (mm) | Weight (KG) | Edge Profile | Application |
|---|---|---|---|---|
| 1200 x 2400 1220 x 2440 | 4 | 18.00 18.61 | Square-cut edge | Internal cladding |
| 1200 x 2400 1220 x 2440 | 6 | 27.00 27.91 | Square-cut edge/ Recessed edge | Internal/external ceiling |
1200 x 2400 1220 x 2440 | 8 | 36.00 37.21 | Square-cut edge/ Recessed edge | Internal partitionExternal wall cladding Wet area and tile backing Floor underlay |
| 1200 x 2400 1220 x 2440 | 9,10 | 40.50 41.86 45.00 46.51 | Square-cut edge | External wall cladding Wet area and tile backing Floor underlay |
| 1200 x 2400 1220 x 2440 | 12 | 54.00 55.82 | Square-cut edge/ Recessed edge | External wall claddingWet area and tile backing Floor underlay |
| 1200 x 2400 1220 x 2440 | 15 | 66.27 68.50 | Square-cut edge | Internal partitions with special requirements Elevated Floor |
| 1200 x 2400 1220 x 2440 | 18 | 79.52 82.20 | Square-cut edge | Internal partitions with special requirements Elevated Floor |
| 1200 x 2400 1220 x 2440 | 20 | 88.36 91.33 | Square-cut edge | Internal partitions with special requirements Elevated Floor |
Installation
Tools:
No special tools are required. The products can be used with normal nails, fastened by normal or self-drilling screws and cut by an electric power saw with a diamond blade.
Fixing:
SHERA Board can be fixed to both timber (minimum size 1.5 x 3 inches) or steel frames (at least 0.55 mm thickness). The board must be supported at the edge at intermediate positions with centers not exceeding 600 mm. Screws must be located more than 12 mm from edges and 50 mm from board corners.
Fastener:
Fasteners can be both nails and screws. It can be nailed directly to timber supports with round wire nails. For metal screws, the size and length of the screw depends on the thickness of the board and the gauge of framing. Pre-drilling the board is a must unless self-embedding, self-drilling head screws such as SHERA Fix-W32 (for fixing 8 – 12 mm board to steel frame), SHERA Fix-B20 (for fixing 4 – 6 mm board to galvanized steel frame) and SHERA Fix –W45G8 (for fixing 15 – 20 mm board to steel frame) are used.
Jointing:
Since fibre-cement board is subject to slight dimensional changes, a butt joint can be used in dry partitioning areas or where an exposed joint appearance is acceptable. For better water protection, either flexible acrylic or polyurethane based sealant can be used to seal gaps of 3-5mm.
No special tools are required. The products can be used with normal nails, fastened by normal or self-drilling screws and cut by an electric power saw with a diamond blade.
Fixing:
SHERA Board can be fixed to both timber (minimum size 1.5 x 3 inches) or steel frames (at least 0.55 mm thickness). The board must be supported at the edge at intermediate positions with centers not exceeding 600 mm. Screws must be located more than 12 mm from edges and 50 mm from board corners.
Fastener:
Fasteners can be both nails and screws. It can be nailed directly to timber supports with round wire nails. For metal screws, the size and length of the screw depends on the thickness of the board and the gauge of framing. Pre-drilling the board is a must unless self-embedding, self-drilling head screws such as SHERA Fix-W32 (for fixing 8 – 12 mm board to steel frame), SHERA Fix-B20 (for fixing 4 – 6 mm board to galvanized steel frame) and SHERA Fix –W45G8 (for fixing 15 – 20 mm board to steel frame) are used.
Jointing:
Since fibre-cement board is subject to slight dimensional changes, a butt joint can be used in dry partitioning areas or where an exposed joint appearance is acceptable. For better water protection, either flexible acrylic or polyurethane based sealant can be used to seal gaps of 3-5mm.
Flush Joint for SHERA Board, Recessed Edge
First coat: Fill the recessed area to the face of the sheet by using a jointing compound then embed the fibreglass mesh tape into the joint.Second coat: Apply second coat at 200 mm width. Allow it to dry thoroughly before applying a finishing coat.
Finishing coat: Apply third coat at 300 mm width. Allow it to dry completely before sanding.
Recommended Frame Specification – For Internal Partition
Galvanized steel frame No.24 (0.55 BMT) is recommended to be used as stud for internal partition using SHERA Board. Stud shall be fixed at the spacing of 600 x 2.400 mm. Details of ideal stud size are shown as follows.
SHERA boards can be attached to steel frames
 Recessed Edge  C 0.55 x 50 x 38 x 3000 mm |  Square Edge  U 0.55 x 52 x 38 x 3000 mm |
Technical Data
| Physical Properties | |
|---|---|
| Thickness Tolerance | + 6% |
| Density | 1300 + 50 kg/m3 |
| Modulus of Rupture | > 7 MPa (Wet) |
| Modulus of Elasticity | 5500 + 50 MPa (Wet) |
| Water Absorption | < 35% |
| Moisture Content | < 12% |
| 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 | + 0.4% |
| Fire Resistance Properties | |
| Ignitibility | Pass |
| Fire Propagaton Index | I = 0.1 |
| Surface Spread of Flame | Class 1 |
| Reaction to Fire Classification | A2 - s1 d0 |
| Durability Properties | |
| Freeze / Thaw Resistance | Pass |
| Warm Water Resistance | Pass |
| Heat / Rain Resistance | Pass |
| Soak / Dry Resistance | Pass |
Transportation, Handling and Storage
Transportation, Handing and Storage:
Deliver SHERA Board to the project site in the original, unopened package and store them in fully enclosed space where they will be protected against damage from humidity, direct sunlight, surface contamination and other causes of damage. Handle SHERA Board carefully to avoid chipping the edges or damaging units in any way. Handling and storage practices should follow the manufacturer’s recommended suggestions at all times.
Deliver SHERA Board to the project site in the original, unopened package and store them in fully enclosed space where they will be protected against damage from humidity, direct sunlight, surface contamination and other causes of damage. Handle SHERA Board carefully to avoid chipping the edges or damaging units in any way. Handling and storage practices should follow the manufacturer’s recommended suggestions at all times.
 Stack boards on a pallet. Cover with a tarpaulin or other waterproof sheeting. |  Carry the boards as shown in order to avoid damage/breakage or injury. |
