WeatherPro®-L is a heavy duty autoclaved fibre cement reinforced calcium silicate board (alias named as fibre cement board). It is an ecofriendly building board endorsed by third party accreditation bodies for green building label. It does not contain any harmful substances or inorganic fibres and is free from formaldehyde and toxic emissions.

The board has high levels of durable performance in the presence of wet and severe weather. WeatherPro®-L is intentionally designed for applications where impact resistance is required in high humid environment. It offers strong technical specification, having CE marked in compliance with durability and aging tests EN 12467: Category A sheet which is for applications where may be subjected to heat, moisture and severe frost weathering conditions. In addition, it also meets the standard of Australia AS/NZS 2908.2 and America ASTM C 1185 for external fibre cement products.

WeatherPro®-L is non-combustible in terms of Reaction to Fire EN 13501-1 Euro Class A1 and BS 476: Part 4, as well as approval in Australia and Japan. Economical and versatile functions make WeatherPro®-L as a real substitute of marine plywood, cement-bonded particle board, gypsum board or magnesium oxide board. It is light-weight, robust and water resistant. It will not warp, swell or decay in wet area. WeatherPro®-L is an excellent substrate for ceramic tiles at wet areas. It can be applied in direct weathering applications when used in conjunction with external grade paint finishes. WeatherPro®-L is produced from a mixture of cement, ground sand, special cellulose fibres and selected fillers to impart durability, toughness, and water resistance. The board is then cured by autoclaving process whereby the ingredients are transformed to crystalline structure under the effects of super-heated steam and high pressure. The synthetic cement silicate binder provides exceptional dimensional stability and an unrivalled resistance to movement due to effects of moisture or heat. The board will not rot or support fungal growth and is unaffected by sunlight and steam.

WeatherPro®-L will not degrade with time and within normal applications, the life of the product is limited only by the durability of the supporting structure and materials used in fastening. The board does not contain any soluble ingredients or free alkali which could be dissolved by moisture or condensation and causing unsightly marks or effiorescence. If exposed to moisture, the board will completely recover on drying out, with no permanent loss of strength. Any staining on the board caused by leakage can be easily painted over. WeatherPro®-L is natural off white in colour and has a smooth finish on one side and a slightly textured reverse. No rendering cement mortar is needed to receiving decorative finishes.

WeatherPro®-L is manufactured to Quality Management System Certification ISO 9001, Environmental Management System Certification ISO 14001Hong Kong Green Label as well as Singapore Green Label.



WeatherPro®-L is a versatile fibre reinforced cement building board for both internal & external use. It has very high levels of durable performance in the presence of wet and severe weather. The fibre cement reinforced calcium silicate matrix allows WeatherPro®-L with good flexurall strength and resistance to impact. It is easy to curve, cut and fix. Typical applications include:

  • Acoustic, water and impact resistant partitions

  • Aesthetic curved constructions

  • Backing board for metal claddings

  • Backing board for marble/ceramic tiles

  • Backing board for furniture/vanity top at wet areas

  • Casings for building services

  • Composite wall panels

  • Decking and flooring applications at balconies, verandahs and pool surrounds

  • External parapet linings, wall planking claddings and facades

  • Green roof sheathing board

  • Smoke vent covers and access hatches

  • Sunscreens, eaves and roof sarking boards

  • Winding / weather resistant roofings and ceilings




WeatherPro®-L is eco-friendly high performance CE marked fibre cement board with strong technical specification of international standards. It imparts extreme high durability and dimensional stability when exposed at severe weather.

Density BS EN 12467 1300 kg/m3 +/-5%
Nominal weight Ambient 8.6 kg/m2 - 6mm
12.9 kg/m2 - 9mm
17.2 kg/m2 - 12mm
21.5 kg/m2 - 15mm
28.7 kg/m2 - 20mm
35.8 kg/m2 - 25mm
Size 1220 x 2440mm
1200 x 2400mm
Size 1220 x 2440mm
1200 x 2400mm
1220 x 3050mm
1200 x 3000mm
Surface alkalinity pH 7-10
Flexural strength BS EN 12467 9.5 N/mm2 - transverse
14.1 N/mm2 - longitudinal
Bending modulus BS EN 12467 7100 N/mm2 - transverse
8300 N/mm2 - longitudinal
Compressive strength BS EN 771-2 27.3 N/mm2 - parallel to the plane of board
Minimum bending radius 4.8m - 6mm, longitudinal
7.2m - 9mm
9.8m - 12mm
Sag when suspended at 610mm span ambient less than 1mm
Durability and strength tests BS EN 12467
CE Marked fibre cement
Category A sheet, intended for applications where are subjected to heat , high moisture and severe frost
Durability and strength tests AS/NZS 2908.2 Type A sheet, intended for external applications where are subjected to the direct action of sun, rain and/or snow.
Durability and strength tests ASTM C 1185 External applications & cladding products
Water impermeability BS EN 12467
AS/NZS 2908.2
ASTM C 1185
Filled with water after 24 hours, no leakage or any water drops
Heat-Rain BS EN 12467
AS/NZS 2908.2
ASTM C 1185
50 test cycles for EN standard
25 test cycles for AS/NZS & ASTM standards
No damage or leakage after test cycles of test with radiant heat 60°C
Warm water BS EN 12467
AS/NZS 2908.2
ASTM C 1185
in water at 60°C for 56 days
Soak-dry BS EN 12467
AS/NZS 2908.2
ASTM C 1185
50 test cycles for EN standard
25 test cycles for AS/NZS & ASTM standards
Freezing and thawing BS EN 12467
AS/NZS 2908.2
ASTM C 1185
100 test cycles for EN Standard
50 test cycles for AS/NZS & ASTM standards
No alteration nor de-lamination after 100 cycles of test at temperature of -20°C ~ 20°C
Moisture movement BS EN 12467 +0.06% @23°C, RH 30%~95%
Dimensional changes in length due to relative humidity BS EN 318 +0.02% @20°C, RH 30%~85%
- 0.02% @20°C, RH 85%~30%
Moisture content Ex works - 15%
In situ - 5%
Water absorption capacity ASTM C1185
BS EN 771-2
~ 30%
Thermal conductivity ASTM C 518
EN 12664
0.30 W/mK
0.26 W/mK
Linear thermal expansion BS EN ISO 10515-8 -3.4 x 1E-7/°C
Resistance to continuous heating In-house 80°C
Fire rated systems BS 476: Part 22 up to 60 minutes external wall system
Non-combustible AS 1530.1
BS 476: Part 4
BS EN ISO 1182
JIS A 1312
Ministry of Land & Transport, Japan. Approval No. NM-3767
Heat of combustion AS/NZS 3837
BS EN ISO 1716
Reaction to Fire - Classification EN 13501-1 Euro Class A1/A1 FL
Australian classification of fire BCA 2011 Group 1
Product certification scheme Singapore Class 2
Green labeled building board Hong Kong, Singapore Certified, no heavy metal & no harmful substance
Organic emission ASTM D5116-06 Non toxic & No formaldehyde, satisfied the emission tests
Recyclable product ISO 14001 Crushed down for recycle use, Products made under ISO 14001 environmental management system
Acoustic reduction (over range 100-3150 Hz) AS 1276.1 & 1191
ASTM E90 & E413
EN ISO 10140-3 & 717-1
STC/Rw (dB) - steel framed partition
28 - 6mm
30 - 9mm
32 - 12mm
48 - 88mm
Load Bearing Resistance
MOH’s Hardness EN 101 Hardness 2 ~ 3
Impact test BS EN 1128 32.48mm/mm
Uniformly distribution load test BS EN 1195
BS 6399 - Table 1
(Clear span at 550mm)
24mm board - 35 kN/m2
Concentrated load test BS EN 1195
BS 6399 - Table 1
(Clear span at 550mm)
24mm board - 35 kN/m2
De ection subject to Uniformly distribution load at 3 kN/m2 BS EN 1195
BS 6399 - Table 1
(Clear span at 550mm)
20mm board No visible damage
Note: All physical performance values of products depicted in this technical handbook are averages based on the standard production. The figures may be changed dependent on the test method used.

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