Vinyl Light Windows & Doors Glossary
A complete A–Z reference guide to help homeowners understand key terminology used in window, door, glass, and installation services across Canada. This glossary includes essential industry terms, as well as definitions specific to Vinyl Light products and services.
A
- Air Infiltration – The unintentional passage of outside air into a home through gaps in a window or door system, reducing energy efficiency.
- Aluminum-Clad Window – A wood window with an exterior layer of aluminum for improved weather resistance.
- Argon Gas – An inert gas used between panes to increase insulation and reduce heat loss.
- Awning Window – A top-hinged window that opens outward from the bottom, allowing ventilation even during rainfall.
- Accordion Door – A folding door system that stacks to one side, often used for closets or room dividers.
- Arched Window – A window with a curved or rounded top, commonly used as an architectural feature.
B
- Basement Window – A compact window designed for lower-level spaces where wall height is limited.
- Basement Egress Window – A safety-compliant window large enough to allow escape during an emergency in a basement.
- Bay Window – A multi-section window that projects outward, creating additional interior space.
- Bow Window – A gently curved series of fixed or operable windows forming an arc.
- Brickmould – Exterior trim that covers the gap between the window frame and the wall opening.
- Bifold Door – A door composed of hinged panels that fold back along a track.
- Blinds Between Glass – Integrated blinds sealed inside the glass unit for low-maintenance light control.
C
- Casement Window – A side-hinged window that opens outward to provide maximum ventilation.
- California Shutters – Interior shutters with adjustable louvres to control light and privacy.
- Cladding – A weather-resistant exterior layer applied to frames (vinyl, aluminum, fiberglass).
- Composite Door – A door constructed from multiple materials to enhance strength, insulation, and longevity.
- Condensation Resistance – A window’s ability to reduce moisture buildup on its surfaces.
- Corner Window – A window that wraps around a building corner for expanded views.
- Custom Windows – Windows manufactured to precise measurements or unique shapes.
- Cut-Out (Window/Door) – A newly created opening in an existing wall for adding a window or a door.
- Curtain Wall – A lightweight exterior wall system made primarily of glass and aluminum.
D
- Daylighting – The strategic use of windows to increase natural interior light.
- Double Glazing – A glass unit consisting of two panes with an insulating spacer in between.
- Double-Hung Window – A vertical-sliding window where both sashes operate.
- Double Slider Window – A horizontal window with two sliding sashes.
- Door Slab – A door leaf without a frame or hardware.
- Dormer Window – A window built into a pitched roof to add light and headroom.
- Drip Cap – A protective flashing installed above windows and doors to direct water away.
- Dutch Door – A horizontally divided door where the top half can open independently.
E
- Energy-Efficient Windows – Windows designed to reduce heat transfer through features like Low-E coatings and gas fills.
- End Vent Slider – A wide window with a fixed center panel and two operable sliding end sashes.
- Egress Opening – Any window or door that meets building code requirements for emergency exit.
- Exterior Door – A door engineered for security, insulation, and weather performance.
F
- Fiberglass Window – A window with frames made of fiberglass, offering excellent strength and resistance to warping.
- Fixed Casement – A non-operable window built in the style of a casement sash.
- Flashing – Waterproof material used during installation to prevent water intrusion.
- Foam Spacer – A warm-edge spacer between glass panes that improves thermal performance.
- French Garden Door – A pair of outward- or inward-swinging glass doors leading to a patio or backyard.
- Frame Expander – An accessory profile used to adapt a window frame to a deeper wall.
G
- Garden Window – A small box-style projection window ideal for plants.
- Gas Fill – Argon or krypton gas placed between panes for enhanced insulation.
- Glass Replacement – Replacing the insulated glass unit (IGU) without removing the entire window.
- Glazing Bead – The trim that holds the glass securely in the frame.
- Grilles – Decorative bars placed on, within, or between glass panes.
H
- Head Jamb – The upper horizontal section of a window or door frame.
- Hopper Window – A bottom-hinged window that opens inward from the top, commonly used in basements.
- Hybrid Window – A window that combines different materials, such as vinyl and aluminum.
I
- Impact-Resistant Glass – Laminated or specially treated glass designed to withstand force from debris or impacts.
- Insulated Door – A door with an energy-efficient insulated core.
- Insulated Glass Unit (IGU) – A sealed multi-pane glass unit designed for improved thermal performance.
- In-Swing Door – A door that opens towards the interior of the home.
J
- Jalousie Window – A window with horizontal glass slats that tilt open for airflow.
- Jamb Extension – Additional material used to extend the depth of the window frame.
K
- Krypton Gas – A dense insulating gas used between glass panes when narrow airspaces are required.
- Keyed Cylinder Lock – A locking mechanism that operates with a key from the exterior.
L
- Laminated Glass – Safety glass with a plastic interlayer that holds shards in place if broken.
- Lift-and-Slide Door – An extensive patio door system that lifts slightly off its seals for smooth sliding.
- Low-E (Low-Emissivity) Glass – Glass coated to reduce heat loss and block UV rays while retaining natural light.
M
- Mullion – A structural or decorative member dividing adjacent windows.
- Muntin – Narrow bars that divide a window into smaller visual sections.
- Multi-Slide Door – A door system with multiple sliding panels that create a wide opening.
- Mineral Wool Insulation – A fire-resistant material often used to insulate around window frames.
N
- Nailing Fin – A flange used to secure new-construction windows to a framed wall.
- New Construction Window – A window made for installation in new builds, featuring a nailing fin.
O
- Obscure Glass – Textured or frosted glass used for privacy.
- Operable Window – Any window type that can open for ventilation.
- Oval Window – An oval-shaped decorative fixed window.
P
- Pane – A single piece of glass within a window system.
- Patio Door – A glass door designed to access patios, decks, or backyards.
- Picture Window – A large fixed window intended to frame an outdoor view.
- Pivot Door – A door that rotates on a central pivot instead of standard side hinges.
- Pocket Door – A sliding door that disappears into the wall cavity.
R
- R-Value – A measure of resistance to heat flow; higher values indicate better insulation.
- Replacement Window – A window designed to fit into an existing opening without disturbing exterior finishes.
- Retractable Screen – A roll-up insect screen that disappears into a side or top cassette.
- Roller Shades – Fabric shades that roll up around a tube.
S
- Sash – The part of the window that holds the glass and may move depending on the design.
- Security Film – A protective transparent film applied to glass to prevent shattering.
- Shims – Thin wedges used to level and support windows during installation.
- Single Slider Window – A window with one operable horizontal sash.
- Single Hung Window – A vertical-sliding window with one operable sash.
- Slider Window – Any horizontal window operating along a track.
- Sound Transmission Class (STC) – A rating that measures a window’s ability to block noise.
- Storm Door – An additional exterior door that protects the main door from the weather.
- Shapes (Custom Shapes) – Windows manufactured in non-standard shapes such as circles, triangles, and octagons.
T
- Tempered Glass – Safety glass that breaks into small, blunt pieces when shattered.
- Threshold – The bottom component of a door frame, often designed to prevent drafts.
- Tilt-and-Turn Window – A dual-operating European-style window that tilts inward or swings open.
- Transom Window – A small window installed above a door or large window for additional light.
U
- U-Factor – A rating that measures heat transfer; lower values indicate better efficiency.
- Utility Door – A durable door designed for utility rooms, garages, or service areas.
V
- Vent – An opening or operable section of a window that allows airflow.
- Visible Transmittance (VT) – The percentage of visible light passing through glass.
- Vinyl Door – A door made from vinyl material, known for low maintenance.
- Vertical Slider Window – A window operating vertically along a sash track.
W
- Warm-Edge Spacer – A low-conductivity spacer that reduces heat loss at the edges of the glass unit.
- Weatherstripping – Materials placed around window or door frames to prevent air and water infiltration.
- Weep Hole – Drainage openings at the base of frames that allow moisture to escape.
- Window Film – A thin applied coating used for UV protection, safety, or privacy.
- Wood Door – A solid or engineered wood door offering classic warmth and natural beauty.
- Wrought Iron Door – A decorative and durable exterior door featuring forged iron details.
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