Hollow-Core Door

Related terms

• Hopper Window

  A window hinged at the bottom that tilts inward from the top. Common in basements for ventilation and egress in some configurations.

• Hinge (Door)

  The pivoting hardware carrying the door's weight; ball-bearing hinges are specified for heavy or high-use doors.

• Impact-Rated Window

  A window with laminated glass and reinforced framing tested to resist windborne debris, required in hurricane zones.

• Head

  The horizontal top member of a window or door frame, below the structural header.

• Insert / Pocket Replacement

  Installing a new window into the existing frame without disturbing trim or siding. Faster and cheaper but slightly reduces glass area.

• Handleset

  The combined exterior grip/handle and (often) deadbolt assembly on an entry door, a major curb-appeal hardware element.

• Insulated Glass Unit (IGU)

  Two or more glass panes sealed with a spacer and gas fill to reduce heat transfer. The standard energy-efficient window glazing.

• Handing

  The designation of which way a door swings and which side the hinges are on (left/right, in/out). Critical to order the correct prehung u…