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Dovetail or interlocking paneling, commonly made of wood but sometimes of novel materials like molded gypsum or extruded clay.

These panels are most simply attached by employing a milled flange to interface to perimeter framing profile slots. Where slightly flexible, the planks can be flexed to pop into the profiles then slid to seat against each other. The final stop strip relies on the slight play in the spacing of the set of planks to allow it to be wedged and snapped in place. For non-flexible planks that cannot have a milled flange, an end-groove is use and short battens are inserted between frame and plank as each is inserted. A narrow stop strip is held in place by friction or pop-in polymer battens. This method will support continuous walls along an entire span.

Some horizontal planking may employ a finished wood divider to conceal recessed Secondary framing. This divider, usually matching the Secondary frame thickness, features its own slots and may be attached to the Secondary frame by bolts or ‘U’ channel lock strip.

Where dovetail planks are mounted fully flush to the inside edge of framing, a back edge flange is formed into or attached to them such that the plank sits flush to the front edge of the structural framing while engaging the profile slots. For exceptionally thin planking, a milled spacer strip may be added to the back of each plank to let them engage the profile slots. The stop-strip is then held in position by friction.

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