Louver Doors Are Made with Spaced Horizontal Slats Called ____

Q13: The outside vertical edge members of a

Q14: French doors may contain from 1 to

Q15: Before windows are installed, the exterior walls

Q16: _ are narrow, closely spaced, concave grooves

Q17: Double-hung windows are twice as large as

Q19: A(n) _ window unit consists of a

Q20: The bottom horizontal member of the window

Q21: Bifold doors are made in wider widths

Q22: The sash is a frame in a

Q23: _ windows have a curved top or