Frequently Asked Questions - Fortex Cladding

Q1: What are the thermal properties (U-value) of Freefoam cladding?
A1: The thermal conductivity is 0.06W/mK, but since the cladding requires battens for ventilation, the U-value calculation uses an alternative external resistance value. This value can be found in U-value calculation software and has minimal impact on the overall U-value of the wall.

Q2: How do I clean and maintain PVC cladding?
A2: Freefoam cladding is low-maintenance and weather-resistant. For best results, clean with a PVC cleaner or warm soapy water. A pressure washer can be used (at half power) occasionally to remove dirt and stains.

Q3: Can cladding be installed vertically?
A3: Yes, all Freefoam cladding can be fitted vertically. Use horizontal battens over vertical counter battens to allow ventilation. A perforated 'J' trim may be used at the base for drainage.

Q4: Do I need ventilation for cladding?
A4: Yes, provide 5,000mm² of ventilation per linear meter (or a 5mm gap) at the top and bottom. Ventilation prevents overheating, moisture buildup, and maintains batten integrity.

Q5: Is Fortex cladding non-combustible?
A5: Fortex is not classified as non-combustible and has a D-s3, d2/AHM rating. It’s suitable for external walls where unprotected areas are allowed but not where non-combustible materials are mandated.

Q6: What height can PVC cladding be installed?
A6: PVC cladding is suitable for residential buildings up to 10m or three floors. Check with local Building Control to confirm compliance with safety standards.

Q7: Is Building Regulation or Planning Permission required for cladding?
A7: If replacing like-for-like (e.g., PVC with PVC), regulations aren’t needed. For other materials, consult local Building Control.

Q8: Should screws or pins be used?
A8: Always use screws for secure installation without restricting expansion and contraction.

Q9: Can Fortex cladding be painted?
A9: Fortex cladding can be repainted but requires a specialized process. Painting will void the warranty, so consult professionals for best results.

Q10: Is a breather membrane necessary?
A10: If the wall is already weatherproof, a membrane isn’t needed. Consult membrane manufacturers or Building Control for specific requirements.

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