Timber Glossary

Timber terminology, made a little easier.

Timber and manufacturing come with their own language. Our glossary gives straightforward explanations to some of the terms you may come across when choosing timber, comparing profiles, reading specifications or discussing your requirements with our team.

Browse all glossary terms below or select a letter to narrow the list.

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Accoya®

A modified timber known for its stability and durability, suitable for applications where long-term performance is important.

American White Ash

A hardwood with a pale colour and distinctive grain, used where a natural timber appearance is desired.

American White Oak

A strong hardwood with a prominent grain, popular for architectural details and natural-finish applications.

Architrave

A moulding fitted around doors or windows to finish the junction between the frame and wall.

Arris

The edge formed where two surfaces of a timber section meet.

Batch

A quantity of timber profiles manufactured together as part of the same production run.

Bead / Beading

A small timber moulding used for finishing, detailing or securing another building element.

Bolection Moulding

A decorative moulding that projects beyond the surfaces it sits between, often used around doors, panels and wall features.

Chamfer

An angled edge machined onto a timber profile, usually replacing a sharp 90-degree corner.

Clear Pine

Selected pine with minimal visible knots and defects, suited to applications where the natural timber will remain visible.

Coating

A finish applied to a timber surface for appearance, protection or preparation for further finishing.

Concave

A surface or profile that curves inward.

Convex

A surface or profile that curves outward.

Cornice

A decorative moulding used at the junction between a wall and ceiling or as an architectural feature.

Cover Mould

A moulding used to cover a joint, gap or transition between two surfaces.

Custom Profile

A timber profile manufactured specifically to meet dimensions, a drawing, sample or other project requirements.

Custom Tooling

Cutting tools manufactured for producing a particular timber profile or shape.

Dado Rail

A horizontal decorative moulding fitted to a wall, traditionally positioned around the height of a chair back.

Defect

An irregularity in timber, such as a knot, split or other feature that may affect appearance or suitability.

Dimension

A measurement defining the width, thickness, length or other size of a timber product.

Dressed Timber

Timber that has been machined to create smooth, consistent surfaces and dimensions.

End Grain

The surface exposed when timber is cut across the direction of its fibres.

Exterior Application

A use where timber is exposed to external conditions and requires appropriate timber selection, treatment and finishing.

Extrusion Profile

A consistently shaped section. In timber, the comparable shape is produced through machining rather than extrusion.

Face

The primary or wider visible surface of a piece of timber or moulding.

Finger Joint

A joint formed by interlocking machined “fingers” at the ends of shorter timber sections.

Finger-Jointed Pine

Pine manufactured by joining shorter selected sections together to produce longer, consistent lengths.

Finished Dimension

The actual dimensions of a timber section after machining or dressing.

Finishing

The preparation or coating of a timber surface to achieve the required appearance or performance.

Fluting

A series of parallel grooves machined into timber to create a decorative detail.

Glazing Bead

A small moulding traditionally used to secure glass within a frame and also used for detailed finishing applications.

Grain

The visible pattern and direction of timber fibres, which varies between species and individual boards.

Groove

A channel machined into the surface or edge of a timber section.

Handrail

A shaped timber profile designed to provide a comfortable gripping surface along stairs, ramps or balustrades.

Hardwood

Timber from broad-leaved tree species, a category that includes timbers such as oak and ash.

Heartwood

The older inner wood of a tree, which can differ from the outer sapwood in colour and properties.

Heritage Profile

A moulding shape associated with an earlier architectural period or used in heritage-style construction and restoration.

Heritage Replication

The reproduction of an existing or historic timber profile for restoration, renovation or extension work.

In-house Tooling

Cutting tools manufactured onsite, providing greater flexibility when producing custom or replicated profiles.

Interior Moulding

A timber profile designed primarily for internal architectural finishing and detailing.

Jamb

A component forming part of the frame around a door or window opening.

Joinery Timber

Timber selected and prepared for use in detailed building components and architectural applications.

Kauri

A native NZ timber strongly associated with historic buildings and often encountered in heritage restoration work.

Kerf

A cut or slot created in timber by a saw blade or cutting tool.

Kiln Dried

Timber dried under controlled conditions to reduce its moisture content before use.

Knot

The portion of a branch incorporated into the timber, visible as a circular or irregular feature in the grain.

Kwila

A dense hardwood valued for its strength, durability and distinctive colour.

Lead Time

The time between confirming an order and the product being ready for supply. This can vary by product, quantity and production requirements.

Lineal Metre

A measurement of timber by length, with one lineal metre representing one metre regardless of profile dimensions.

LRV (Light Reflectance Value)

A measure of how much visible light a surface reflects, expressed on a scale from dark to light.

Machining

The process of cutting and shaping timber using manufacturing equipment to achieve required dimensions and profiles.

Made to Order

A product manufactured specifically in response to an order rather than supplied from existing stock.

Merchant

A trade supplier through which timber products may be purchased or sourced.

Minimum Order Quantity (MOQ)

The smallest quantity that may be required for a particular product or manufacturing run.

Moisture Content

The amount of water present in timber, usually expressed as a percentage of its dry weight.

Moulding

A length of timber machined to a particular cross-sectional shape for functional or decorative use.

Native Timber

Timber from tree species indigenous to NZ, including species such as rimu and kauri.

Natural Finish

A transparent or lightly coloured finish intended to retain the visible character and grain of the timber.

Nominal Dimension

A stated or commonly recognised timber size that may differ from its final dimensions after machining.

Nosing

A shaped profile used to finish or protect a projecting edge, commonly associated with stairs, benches or shelving.

Ogee Profile

A decorative moulding featuring opposing concave and convex curves, commonly found in traditional detailing.

Ovolo Profile

A rounded convex moulding commonly used in traditional and decorative timber profiles.

Paint Grade

Timber selected or prepared for an application where the finished surface will be painted rather than left natural.

Picture Rail

A horizontal decorative moulding traditionally used near the top of a wall for hanging pictures.

Pine

A versatile softwood widely used for timber profiles and mouldings in NZ.

Planer

A machine used to produce smooth timber surfaces and consistent dimensions.

Primed

Timber supplied with a primer coating applied in preparation for subsequent painting.

Profile

The cross-sectional shape of a timber product when viewed from its end.

Profile Knife

A specially shaped cutting tool used in machinery to produce a particular timber profile.

Profile Replication

The process of reproducing an existing timber profile from a physical sample, drawing or specification.

Profiling

Machining timber to create a defined cross-sectional shape.

Quality Control

Checks carried out during manufacturing to help ensure products meet required standards and specifications.

Quarter Round

A moulding with a quarter-circle cross-section, commonly used to finish junctions, edges and internal corners.

Radiata Pine

A widely grown NZ softwood extensively used in building products, profiles and mouldings.

Radius

The measurement used to define the curvature of a rounded part of a profile.

Rebate

A step-shaped recess machined along the edge or face of a timber section.

Reeded Profile

A decorative surface featuring a series of raised parallel rounded details.

Rimu

A native NZ timber valued for its distinctive colour and grain and frequently found in older buildings.

Rough Sawn

Timber that retains the relatively rough surface created by initial sawing and has not yet been dressed smooth.

Sample

A physical example of a timber, profile or finish used to help assess suitability or reproduce an existing moulding.

Sanding

The process of smoothing a timber surface using an abrasive material.

Sapwood

The younger outer portion of a tree's wood, which can differ in colour and properties from the heartwood.

Scotia

A concave moulding commonly used to create a neat finish at an internal junction.

Scriber / Scribing Mould

A small moulding used to cover or accommodate the junction between timber components and adjoining surfaces.

Sealing

Applying a suitable product to a timber surface to reduce moisture absorption or prepare it for finishing.

Skirting

A moulding fitted along the base of an internal wall to create a finished transition between wall and floor.

Softwood

Timber from coniferous tree species, including radiata pine and cedar.

Specification

The documented requirements a product must meet, which may include dimensions, timber, profile and finish.

Specification Drawing

A technical drawing showing the dimensions and shape required for a timber profile or component.

Stock Profile

A standard profile that forms part of an established product range rather than being created specifically for one project.

Stockist

A merchant or supplier that carries or can source products from a manufacturer.

Surface Preparation

The work carried out to prepare timber for painting, coating or another finish.

Sustainably Sourced Timber

Timber sourced with consideration for responsible forest management and long-term resource sustainability.

Timber Movement

The natural expansion or contraction of timber as its moisture content changes.

Timber Profile

A length of timber machined to a defined cross-sectional shape for a particular functional or decorative purpose.

Timber Species

The particular type of tree the timber comes from, influencing characteristics such as appearance, density and performance.

Tolerance

The acceptable amount by which a manufactured dimension may vary from its specified measurement.

Tongue and Groove

A jointing system where a projecting tongue on one board fits into a corresponding groove on another.

Tooling

The cutters, knives and related equipment used to machine timber into required shapes and profiles.

Treatment

A process applied to timber to improve its resistance to biological deterioration for suitable applications.

Unprimed

Timber supplied without a primer coating, allowing the appropriate finishing system to be applied later.

V-Groove

A V-shaped channel machined into timber, often used as a decorative detail or to define the junction between boards.

Veneer

A thin layer of real timber applied over another material to provide a timber surface or appearance.

Weatherboard

An exterior cladding board shaped and installed to create a weather-resistant overlapping or interlocking wall surface.

Western Red Cedar

A lightweight softwood valued for its natural durability, dimensional stability and distinctive appearance.

Width

The measurement across the face of a timber section or profile.

Working Drawing

A detailed drawing providing dimensions and other information required to manufacture a component accurately.

Yield

The proportion of usable product obtained from timber after defects, machining and other processing are taken into account.

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