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The Hebel PowerPanel50 guide fixes panels to top hats at each stud, at a maximum of 600mm centres, with at least 2 screws per top hat at each stud. Your building designer confirms top hat spacing and numbers.
Facadia's generic top hats are compatible battens in 4.8m lengths, not CSR Hebel-branded. Check they meet your system's CodeMark certificate and installation guide. Hebel-range perforated top hats are also listed.
Facadia's AAC panel calculator estimates top hats along with panels, screws and adhesive from your wall area.
Other brands set their own top hat rules in their guides, so use the guide for your system.
Sources: Hebel PowerPanel50 external walls design and installation guide (HELIT181) · Facadia AAC panel guides · AAC panel calculator
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Last updated: 29/10/2026. General information only, not design or compliance advice. Prices change, so check the live product page.
