KICK PLATE -
A metal or plastic strip, placed at the lower edge of a door or riser to protect it from damage by accidental kicking.
KILOWATT -
1000 watts.
KITE WINDER -
The steps at the curvature of a circular stairway, which are triangular, or kite-shaped.
KNOLL -
A small rounded hill.
KNOT -
The hard irregular shaped defects in boards caused by cutting at the point where the branch of a tree meets the truck.