Cembrit Windstopper Extreme
Fibre Cement 'A' fire rated sheathing board
Through wall solution or system, sheathing, roofline soffits.
Non-combustible, breathable fire rating tested sheeting board. Consists of grey cement and limestone filler, reinforced to absorb and release moisture without affecting durability, strength or performance.
Features and benefits:
- High-density material.
- High impact resistance.
- Can be pressure washed.
- Suitable backer for laminates.
- Suitable in composite panels.
- Non-combustible.
- Fire tested up to 60 or 120 minutes, depending on model.
- Class A2 fire rating to EN 13501-1.
- Resistant to rot and fungal growth.
- Can be left exposed for 6 to 12 months, depending on model.
- Red listed materials: Does not contain substances listed in the ”Candidate list of substances of very high concern for authorisation”.
- Lightweight 4.5 mm-thick option.
Application:
Through wall solution or system, sheathing, roofline soffits.
Finish | Smooth surface |
Features | High impact resistance and resistant to rot and fungal growth |
Material | Fibre cement, homogeneous |
Shape | Rectangular |
Size | Available in three sizes |
Uniclass 2015 | |
CAWS | K11/485 Wall sheathing K11/60 Board K11/845 Cement-bonded particleboard K11/890 Board |
Product Reference | Cembrit Windstopper BasicCan be left exposed for 6 months, 60/60 fire rating (one hour). Cembrit Windstopper ExtremeCan be left exposed for 12 months, 90/90 fire rating (1.5 hours, 9 mm only). |
Standards | To BS EN 12467:2004, Class NT D31 |
Performance class | To BS EN 634-2 |
Reaction to fire classification | To BS EN 13501-1, Class A2-s1, d0 |
Thickness | 4.5 mmNot available with Cembrit Windstopper Basic. 9 mm4.5 mmNot available with Cembrit Windstopper Basic. 9 mm |
Decorative overlay | Cembrit Windstopper Extreme homogenous coating |
Preservative treatment | Cembrit boards are produced according to a flow-on method |
Size (w x l) | 1200 x 2400 mm1200 x 2700 mm1200 x 3000 mm |
Weight | 14.1 kg/m² |
Standard product features | Colour: Natural grey. Features: High impact resistance and resistant to rot and fungal growth. Finish: Smooth surface. Material: Fibre cement, homogeneous. Shape: Rectangular. Size: Available in three sizes. Recycled content: Dependent on model. Consult manufacturer's literature for information. Embodied carbon: Dependent on model. Consult manufacturer's literature for information. Red Listed materials: No. Country of origin: Production site - Finland. |
Embodied carbon | Dependent on model. Consult manufacturer's literature for information |
Recycled content | Dependent on model. Consult manufacturer's literature for information |
| Platform | Compatible | Version | Certified to |
|---|---|---|---|
 IFC | - | 1 | 2.1 |
 Revit | - | 1 | 2.1 |