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Reinforced, lightweight, water resistant cement backer board with tapered edges to facilitate invisible butt joint installation. Approved for use with all leading renders, Cembrit PB’s lack of heat and moisture movement, combined with reinforced tapered edges which allow fixings close to the board’s edges provides a strong and stable base which minimizes the risk of cracking of applied finishes. Cembrit PB is lightweight and easy to cut and lift; mechanical cutting is not required. Reinforced, tapered edges facilitate butt jointed fixing for a stable, crack free base making Cembrit PB popular for external decorative rendering, brick slips or stone slip cladding. Cembrit PB can also be used as an element within internal fire rated partition walls and ceilings. .
In external applications strength and stability are necessary to avoid impact damage and cracking of the decorative coating. Used in conjunction with sheathing board, incorporating reinforcing mesh embedded in the base coat, this system will provide a uniform joint free appearance in any number of coloured and textured finishes with excellent impact and weather resistance. Dimensional stability and rigidity are crucial to avoid cracking and delamination of the exterior finish. The rapid installation of liquid finishes is another advantage. With PB flex it is possible to render onto curves such as columns, spiral staircases and archways.
Linear variation due to change in moisture content 0.05%. Freeze/thaw (cycles) per ANSI A118.9 = 100.
Rigid cement and aggregate board incorporating polystyrene beads. Reinforced tapered edges designed for butt jointing. Flat surfaces of the board strengthened with glass mesh.
Dark grey flat surfaces with grid texture indicating presence of strengthening mesh. Tapered edges with lighter grey cement colour.
• Easy to lift and work. Unlike other cementitious or calcium silicate boards no specialist blades or fixings required.
• Easily cut by scribing and breaking. Cut edges are generally clean and do not require sanding. No need for mechanical cutting tools, or dust extraction equipment.
• Can be nail or screw fixed close to reinforced tapered edges.
• Can be used in fire rated internal wall partition assemblies.
|Size & Weight|
|Density (?)||12001200 Kg/m3|
|Thickness (?)||12 mm|
|Weight per m2 (?)||14.41414 Kg/m2|
|Width (?)||2400 mm|
|Quantity Per Pack (?)||36363636|
|Certifications & Ratings|
|Fire Classification (BS National Standards) (?)||Class 0|
|Fire Classification (European BS EN) (?)||Class A1|
|Flexural Strength (MPa) (?)||5555 MPa|
|Max Temperature (?)||105105 °C|
|Materials & Finishes|
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