A-Z Technical Glossary of Timber Joinery Terms
All0 terms
Architrave
A decorative moulding fitted around a door or window opening to conceal the junction between the frame and wall lining.
Awning Window
A window hinged at the top that opens outward from the bottom. Popular for ventilation and weather protection.
Beading
Timber strips used to secure glazing within a sash or frame.
Bifold Door
A door system consisting of multiple panels that fold and stack to one or both sides when opened.
Bottom Rail
The lower horizontal member of a door or window sash.
Casement Window
A side-hinged window that opens outward like a door.
Cedar
A durable timber species valued for its natural resistance to moisture, decay and insect attack.
Compliance
The process of ensuring joinery meets applicable Building Code and council requirements.
Double Glazing
Two panes of glass separated by a sealed cavity designed to improve thermal performance and reduce noise.
Double-Hung Window
A window with two vertically sliding sashes that can move independently.
Drip Edge
A detail designed to direct water away from timber surfaces.
End Grain
The exposed ends of timber fibres. End grain absorbs moisture quickly and must be properly sealed.
Engineered Timber
Timber products manufactured from multiple layers or sections to improve stability and reduce movement.
Facings
Timber extensions that cover the junction between the joinery frame and wall cladding.
Fanlight
A small window positioned above a door or another window.
Fixed Light
A glazed panel that does not open.
Flashing
A weatherproof barrier designed to direct water away from openings in a building.
Frame
The fixed outer structure that supports windows, doors or glazing.
Glazing
The installation of glass into a window or door system.
Glazing Bead
A shaped timber profile used to secure glass in place.
Glazing Putty
A traditional compound used to hold and weatherproof glass in timber joinery.
Head
The top horizontal member of a window or door frame.
Heritage Joinery
Joinery designed to replicate or restore original architectural details in heritage buildings.
Hinge Stile
The vertical edge of a door or window where hinges are fitted.
IGU (Insulated Glass Unit)
A factory-sealed unit comprising two or more panes of glass separated by a spacer.
Interior Joinery
Timber joinery installed within a building, including interior doors, trims and mouldings.
Jamb
The vertical side members of a door or window frame.
Joinery
The craft and manufacture of timber windows, doors, frames, mouldings and architectural components.
Kauri
A native New Zealand timber historically used in many heritage buildings and restoration projects.
Kick Plate
A protective panel installed at the bottom of a door.
Latch
A device used to secure a door or window in the closed position.
Lintel
A structural member spanning above a window or door opening.
Low-E Glass
Glass with a special coating designed to improve thermal performance by reflecting heat.
Meeting Rail
The horizontal members where two operable sashes meet.
Mortise and Tenon Joint
A traditional timber joint providing exceptional strength and durability.
Mullion
A vertical member separating adjacent windows, doors or glazed panels.
Muntin
A smaller profile dividing individual panes of glass within a sash.
Natural Finish
A clear coating that allows the natural colour and grain of timber to remain visible.
New Build Joinery
Joinery manufactured specifically for new residential or commercial construction projects.
Opening Sash
A sash designed to open for ventilation or access.
Ovolo Profile
A traditional rounded moulding profile commonly found in heritage joinery.
Pivot Door
A door that rotates on pivot hardware rather than traditional side hinges.
Profile
The shape or contour of a moulding, frame or joinery component.
Putty
A traditional glazing compound used to secure glass within timber frames.
Quarter Round
A moulding profile with a quarter-circle shape used for finishing and detailing.
R-Value
A measure of how well timber or other building materials resist heat transfer. The higher the R-Value, the better the insulation.
Rail
A horizontal component within a door or window sash.
Rebated Door
A door with a stepped edge designed to improve weatherproofing and security.
Refurbishment Joinery
Joinery manufactured for renovation and restoration projects.
Reveal
The internal lining surrounding a window or door opening.
Rimu
A native New Zealand timber prized for its appearance and suitability for heritage work.
Sash
The framework that holds the glass within a window.
Sash Window
A window containing one or more moveable sashes.
Sealant
A flexible material used to prevent water and air infiltration around joinery.
Sidelight
A glazed panel positioned beside a door.
Sill
The bottom horizontal member of a window frame.
Stained Finish
A finish that alters the colour of timber while allowing the grain to remain visible.
Stile
The vertical member of a door or sash.
Thermal Performance
A measure of how effectively joinery reduces heat transfer.
Threshold
The bottom section of a doorway providing a transition between spaces.
Timber Movement
The natural expansion and contraction of timber due to changes in moisture levels.
Top Rail
The upper horizontal member of a door or sash.
Transom
A horizontal member separating windows or dividing a door from a fanlight above.
U-Value
A measurement of how much heat passes through a window or door system. Lower values indicate better thermal performance.
Veneer
A thin layer of timber applied to another substrate for decorative purposes.
Ventilation Stay
A device used to hold a window open at a selected position.
Weather Seal
A component fitted around windows and doors to reduce drafts and water penetration.
Weatherboard
Horizontal timber cladding installed on exterior walls.
Window Hardware
Components such as handles, hinges, stays, locks and catches.
Window Reveal
The visible surface between the frame and wall opening.
X-Bracing
A structural bracing pattern occasionally incorporated into doors, gates or architectural features.
Yield
The amount of usable timber obtained from a log or timber section after machining.
Zero Threshold
A threshold detail designed to provide seamless access between indoor and outdoor spaces.