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Battens
Battens are thin strips of solid material (usually constructed of wood but occasionally other things) that are used for a multitude of purposes in building construction and other various fields. Battens are used to provide a fixing point for roofing sheet or roof
tiles. The orientation and spacing of the batten depends on the type
of roof. They may be oriented at right angles to the trusses or rafters of a roof, like purlins.
They may be parallel to the slope of the roof, as on a batten seam
roof, where the batten is used to cover seams in the roofing material and are
themselves covered by metal caps. Some roofs may use a grid of battens
in both directions, known as a counter-batten system. Battens are held into place with trim or moulding (a thin strip of trim) with a rectangular cross-section that is used to cover seams between panels of exterior sliding or interior paneling. Board-and-batten siding is an exterior treatment of vertical boards with battens used to cover over the seams.
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