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Tray Fixings

Perhaps the most outstanding feature of all tray roofs is the minimisation of visible fasteners. Apart from the secret fixing clips, attachment of flashings to the roof should be achieved by crimping to the cladding or other flashings or to a grab flashing wherever possible.

Clips for standing seam roofing are normally single clips, fastened to the substrate with screws or annular grooved nails. The sole of the screw should have a rebated or countersunk hole for the fastener, and rounded edges, to ensure thermal movement of the sheet does not cause damage by rubbing against sharp edges.

Wall cladding laid horizontally may need additional support, in addition to the standard bracket, to resist gravity loads.

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/cop/other-products/tray-roofing#tray-fixings
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Content editing for clarity.