Cembrit Windstopper Basic (9x1200x3000mm - 3.60m²) is a fibre-cement, non-combustible breathable external sheathing board used as a wind barrier layer on timber or steel frame walls with external ventilated cladding.

The board consists of grey cement and limestone filler, reinforced with a specially selected fibre material that can absorb and release moisture without affecting the durability, strength or performance of the board.

When installed according to Cembrit installation instructions, Cembrit Windstopper Basic will function as a temporary facade protection for up to 6 months.

Cembrit Windstopper Basic Board is powerfully resistant towards both rot and fungal growth and can withstand considerable fluctuations in weather and climate conditions.

The unique manufacturing process does not include compressing resulting in a natural rough surface.

Cembrit Windstopper Basic has a very low vapour transmission resistance, enabling moisture from inside the building to pass through.

In consequence, insulation can be placed directly against the inner side of the board.

Specification:

Thickness: 9mm

Width: 1200mm 

Length: 3000mm

Board Coverage: 3.60m2

Density: 1450kg/m3

Surface Front Face: natural rough surface

Surface Back Face: natural rough surface

Durability (Life Expectancy - Minimum): 30 years

Fire Reaction: Class A2-s1,d0, Non-combustible

Cembrit Windstopper Basic Features:

 · Breathable.

 · Fibre-cement based.

 · Sheathing board.

 · Non-combustible

 · Highly durable.

 · Moisture and mould resistant.

 · Can be used as a wind barrier.

 · Vapour permeable board.

 · Natural rough surface.

 · Windproof membrane for exterior walls.

 · Sustainable solution.

 · Resistant to harshest weather and climate conditions.

 · 15 Year Cembrit Warranty.

 · Can be used as temporary facade protection for up to 6 months.

 · Resistant towards both rot and fungal growth.

Cembrit Windstopper Basic Installation Guidelines:

 · The boards are fixed to the wall frame with screws or clout nails spaced 200mm along all edges and 300mm elsewhere.

 · The distance between screws or nails and the board edges shall be minimum 15mm, and distance to the corners minimum 70mm.

 · The screw or nail heads shall be level with the board surface.

 · The diameter of clout nail heads shall be minimum 8mm.

 · If other types of nails with smaller heads are applied the nails shall be covered by a tape in the same way as for joints between boards.

 · Connections to foundations, window and door openings, roof and wind barrier penetrations shall follow the principles shown in relevant Building Research Design Guides.

 · When used as sheathing and wind barrier in floors over crawl space foundations Cembrit Windstopper boards are fixed with screws spaced 200mm along all edges.

 · The distance between screws and the board edges shall be minimum 15mm, and distance to the corners minimum 70mm.

 · Penetrations of the wind barrier layer in structures with a classified fire resistance shall have a documented fire resistance performance which do not reduce the fire resistance performance of the boards.

 · All joints between boards shall be sealed with Cembrit Windstopper Tape.

 · The board surface shall be dry and free from dust before the tape is applied.

 · Minimum effective width shall be 50mm.

 · At tape joints the overlap shall be minimum 25mm.

 · The boards shall be stored on a level support in a dry place.

 · If stored outside the boards shall be protected from moisture, dirt and mechanical strain by a ventilated tarpaulin.

You can order free Cembrit Windstopper Basic samples here.

*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet