Title: Unit 3 Glossary
Course: HAC 140 Weatherization > Section: HAC 140 Weatherization

Unit 3 Glossary

Terms

Term | Definitions
Air leakage | Uncontrolled ventilation through gaps in the pressure boundary. Typical sites of air leakage include around windows, pipes, wires, and other penetrations.
Awning window | Awning windows are essentially casement windows that swing vertically. Awning windows are often used in basements. Jalousie windows, found on older mobile homes, are a type of awning window.
Balloon framing | In carpentry, the lightest and most economical form of construction in which the studding and corner plates are set up in continuous lengths from the first floor line or sill to the roof plate to ...
Box sill | Common method of framing floor joists, where a header is nailed to the ends of the floor joists.
Casement window | Casement windows have a single operable sash that swings outward on a horizontal plane. Casement window frames that have gone out of square due to settling can stick and quite possibly render thes ...
Door casing | A wooden trim around doors that covers the seam between the jamb and the wall.
Door stop | The wood trim fastened to the inside of the jamb that positions the door within the jamb and into the latching mechanism.
Double-hung window | Double-hung windows have operable upper and lower sashes that slide vertically in a channel. Upper sashes are often painted shut.
Eave chute | Device that maintains air space between the insulation blanket and the roof sheathing and prevents insulation from clogging eave vents.
Glass pane | Sheet glass cut in shapes for windows or doors.
Glazing | Glass installation. Pertaining to glass assemblies or windows.
Head jamb | Groove at the top of the window that allows the window sashes to slide into place and sit inside the window frame.
Hinges | The metal objects that attach your door to the jamb, normally with screws. They can be made from brass, steel, iron, or other metals.
Incidental repair | Repair necessary for the effective performance or preservation of weatherization materials. Such materials may include framing or limited roof repair, so attic insulation doesn’t get wet. It doe ...
Jambs | The wood that surrounds the door unit to which the door is attached on the hinge side.
Lower sash | The bottom portion of the window consisting of a pane of glass set inside a frame. The lower sash is fixed in a single-hung window and slides up and down in a double-hung window.
Mud sill | A wood component attached to the foundation of a building that creates a means of attaching various components of the framing to the foundation.
Mullions | Vertical framing members that don't run the full length of the door.
Panel | Parts of a door between rails and stiles or mullions.
Picture window | Picture windows have no operable sashes and are used primarily for aesthetics.
Platform framing | A system of framing a building in which floor joists of each story rest on the top plates of the story below or on the foundation sill for the first story, and the bearing walls and partitions res ...
Sash | A framework that holds the panes of a window in the window frame.
Savings-to-investment ratio (SIR) | A calculation that determines the cost-effectiveness of a weatherization measure by dividing the estimated savings over its lifetime by the cost. SIR is computed over the lifetimes of the retrofit ...
Side jamb | Grooves in window that allow the window sashes to slide up and down or side to side.
Sill | The very bottom of the window. The sill is usually sloped to allow water to run off the bottom of the window in rain or during cleaning.
Slider window | A slider window is essentially a double-hung window turned on its side so the sashes move horizontally.
Stiles | Full-length vertical framing members of a door.
Thermal break | A thermal break is an element of low thermal conductivity placed in an assembly to reduce or prevent the flow of thermal energy between conductive materials.
Thermal transmittance | U-factor is a measure of non-solar heat flow through all the components of a material, typically used in reference to windows. The lower the U-factor, the better the thermal performance. U-factor ...
Threshold | A beveled wood member fastened to the floor and situated between the side jambs. The threshold seals the space between the bottom of the door and the floor.
Trim | Extends beyond the end of the window frame on the outside of the window opening. This allows the window to fit flush with the exterior wall when the window is installed.
Upper sash | The top portion of the window consisting of a pane of glass set inside a frame. The upper sash is fixed in a single-hung window and slides up and down in a double-hung window.
Window stop | A wood trim member nailed to the window frame to hold, position, or separate window parts. The stop is often molded into the jamb liners on sliding windows.