wood sill

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sill, 1
1. A horizontal timber, at the bottom of the frame of a wood structure, which rests on the foundation.
3. The horizontal bottom member of a window frame or other frame.
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References in periodicals archive ?
The newly renovated digs, advertised on Craigslist in early January, feature several small cutouts of brick, framed by wood sills and back-lit like works of art.
She also alleges that most didn't fit, plaster was chipped from internal walls and the team of two fitters could offer only dark wood sills to match the new white uPVC frames.
To protect the base of the siding, where wood sills may overhang the foundation, consider putting a perimeter of crushed stone, so fire can't get a foothold adjacent to the house.