RCMCEM
Cemboard is a rigid, medium density, high performance cement building board which combines the strength and durability of a concrete product with the workability of timber.

Cemboard is an excellent sheathing and accoustic building board. The product is used extensively as an outer sheathing board onto metal and timber frame structures, behind the outer cladding finish.

 

 

 


Technical Data

Basic Composition - Cemboard is manufactured from chemically treated rubber wood chips and mixed with Portland cement.

General Properties - Cemboard posses a stable crystalline structure is reasonably resilient to water penetration, humidity changes, rot, insects, termites, vermin and is fire rated class O.

Machine-ability - Cemboard can be cut, drilled, nailed and worked in a similar fashion to timber and chipboard with standard wood working tools, but offers a much longer performance life.

Applications - Cemboard offers excellent sheathing and accoustic properties. The product is primarily used behind external cladding systems as a sheathing board, or in accoustic applications in walls, floor and roof structures.

Maintenance - Virtually maintenance free and so cost effective.

Health & Safety - Appropriate health and safety precautions must be adhered to when working with this product (see lifting and handling section).

 

RCMCEM

 

Nominal density   1250 -1300kg/m3
Bending Strength (Modulus of Rupture) 9.0Mpa
Modulus of Elasticity (MoE) 4.5Mpa
Thermal Conductivity 0.26W/mk
Moisture Content 9% ±3%
Moisture Movement (EMC to Saturated) 0.15%
Fire Rating BS476 Part 6 & 7 Class 0 material
Fungus attack Highly resistant
Termite attack Highly resistant
Frost resistance 3 star
Surface Condition Front face Smooth
Back face Smooth
Durability (life expectancy - minimum) 30 years
Standard board size 2400 x 1200mm

 

Thickness (mm)
8
10
12
16
18
20
24
Weight (kg/m2)
10.1
12.5
14.9
20.1
22.6
25
29.9
Sound insulation (dB) †
29
31
32
33
33
33
35

 

Dimensional Tolerance Length ±4 mm
Width ±3mm
Thickness 8-16mm : ±1mm
18-20mm: ±1.3mm
24mm: ±2mm

 

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