The combination of the head, sill and jamb sections of a window.

The part of a sliding glass door, a sliding window or a hung window where two panels meet and create a weather barrier.

To make a diagonal cut, beveled to a specific angle (usually 45°). Sometimes miter cuts are made into an overlapping siding or soffit panel surface, to provide a neater appearance.

A weatherstripping material that is present where the sash frame meets the masterframe. Adds increased resistance to air infiltration.