rough sill

rough sill

1. In frame construction, the sill, 1 on which the building frame is erected.
2. The wood piece laid across the bottom of a rough opening to act as a base for a window construction.
References in periodicals archive ?
Window openings are just like doors but with the addition of a rough sill. Mark the top of the sill by measuring down from the header.
And second, measure the height and width of the "rough opening." The rough opening is the width between the trimmer studs and the height between the rough sill and the header.