Fire Rating (Reaction to Fire): A2(Limited combustibility)
Fire rating: A2
9mm Swisspearl Windstopper Basic is a specialised building board featuring an integrated windproof membrane for exterior wall applications. Designed to protect the building envelope during construction and beyond, it combines robust weather resistance with vapour permeability to support healthy wall assemblies. It acts as a temporary weather barrier behind ventilated façades, offering robust protection while allowing vapour diffusion.
Note: formerly known as Cembrit Windstopper Basic
CHARACTERISTICS
Cement-bonded fibre board with a natural grey finish
Prevents wind-driven rain and air infiltration behind cladding
Vapour-permeable to support healthy wall construction
Non-combustible; suitable for use in fire-rated assemblies
Resistant to impact, rot, and fungal growth
No surface treatment required; can be left exposed for up to 6 months during construction
Compatible with Swisspearl façade panels and insulation systems
APPLICATION
Behind ventilated façade systems
As a temporary weather shield during construction
In timber or metal frame wall assemblies
Suitable for both residential and commercial buildings
INSTALLATION
Fix directly to subframe using corrosion-resistant screws or staples
Joints may be left open or sealed depending on system requirements
Ensure overlap and correct detailing at corners and openings
Datasheet_Windstopper_Basic.pdf