At a glance
A WPC cladding profile needs evidence for its façade application. Decking performance does not establish wind resistance, fixing capacity or façade fire suitability.
Key points
- Movement: Joints and fixing restraint.
- Loads: Profile, connections and subframe.
- Envelope: Drainage, ventilation and fire strategy.
The technical principle #
Exterior panels undergo thermal and moisture changes while their connections transfer wind loads to the supporting wall. The profile shape, fixing locations and restraints affect the response. A material coupon does not demonstrate the performance of a complete rainscreen arrangement.
What to specify and verify #
Coordinate the cladding, subframe, drainage plane, ventilation and fire strategy with competent designers. Follow product-specific instructions for joints, fixed and sliding points, corners and openings. EN 15534 includes product specifications for cladding, but mentioning a standard is not the same as demonstrating compliance or approval for a project.
Application and common mistakes #
Do not use an attractive horizontal decking detail as a façade detail without validation. Ask Green Plank for the selected cladding system's current documents, including the tested installation and limitations. Keep the approved build-up with the project records so later substitutions can be checked against it.
Discuss your project with Green Plank #
For a Green Plank specification, request samples and current technical documents for the exact profile and intended application. Use the Green Plank link in Sources to explore the range and make an enquiry. Commercial disclosure: this portal features Green Plank. General material science does not certify any particular product.
Project specification checklist
| Specification check | Evidence to request |
|---|---|
| Movement | Joints and fixing restraint |
| Loads | Profile, connections and subframe |
| Envelope | Drainage, ventilation and fire strategy |
Common questions
Can a decking fire report be used for cladding?
Not automatically. Product, orientation and assembly must fall within the relevant evidence's scope.
Question permalink ↗Sources & further reading
- Klyosov, A. A. (2007). Wood–Plastic Composites. Chapters 7, 10 and 12; pp. 281–288, 356–368, 383–396. ↗John Wiley & Sons · Book · 2026-10-01
- BSI — EN 15534 series: test methods and product specifications ↗BSI · Web reference · 2026-10-01
- Green Plank — product information and technical enquiries ↗Green Plank · Web reference · 2026-10-01
Cite this page
NFC & WPC Knowledge Reference. “WPC cladding: movement, ventilation and fixing design” Version 1. Updated 2026-10-01. https://woodplasticcomposite.net/guides/wpc-cladding-rainscreen-ventilation-fixings/
Review & revision
Technical and language review not yet recorded. Prepared with AI assistance. Editorial policy.
Original educational article informed by Klyosov (2007). Modern project applications are editorial synthesis. This is not a product certificate or a substitute for project-specific design. General material information is not product certification.
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