Because timber is a natural product it expands and contracts with seasonal changes and is affected by the moisture content of the air. Therefore time is needed  to allow it to settle in and adjust to the change in its environment.


Serve as a decorative and functional trim around windows, doors and where the floor meets a wall. Architraves, also known as skirting boards hide the gap between the wall and and the door jamb or window frames. They are also used to 'finish' wall openings in which no doors are hung.



Architrave Corner Block

A decorative square molding used in the corners of doors and windows.

Chair Rail

Although originally designed to protect walls from damage inflicted by the backs of chairs, the chair rail today primarily serves as a decorative function – encircling the perimeter of a room and/or separating different wall finish treatments.


Coping or scribing is the woodworking technique of shaping the end of a moulding or frame component to neatly fit the contours of an abutting member. Coping ensures a clean joints between intersecting members when walls are not square to each other. Coping is only ever used for internal corners. External corners are always mitred.


An architectural bracket projecting from within a wall, formed by extensions of the masonry and wood beyond the wall surface, and supporting a burdensome weight above.


A timber moulding, also called Edging that is used to "finish off" and protect the edges of boards, shelving, bench tops etc. Also used as 'strapping'  to cover the butted joints of sheet material such as plywood, sheeting and hardboards. Coverstraps come in a range of designs including minimalist square edges, smooth rounded edges and more decorative ribbed and beaded edges.


A wide decorative timber molding design that gives an elegant appearance to a finished internal corner. The shape is designed to gracefully flare out to a finished top edge. Crown moldings are used at the junction of an interior wall and ceiling. Crown moldings are used extensively in the creation of interior and exterior cornice assemblies and door and window hoods

Dado Rail

These mouldings serve to cover (cap) the exposed top edges of timber panelling boards (generally 10 – 12mm thick) which are fitted vertically to the lower portion of a wall (termed a "dado" wall).
The horizontally affixed dado capping provides a decorative trimming to the dado panel wall, and is generally approximately 900mm – 1500mm in height.
Internal and External Corners are available to combine with the Georgian Dado and add architectural dimension to moulding installations. With no need to make precision 45 deg. mitres, subsequent dado pieces need only be butt joined, saving time.
Fitting Hint: Simply place your corner pieces at the required height, using a spirit level to ensure they are aligned correctly.
If the wall is uneven, you may need to use a little packing to assist here. Affix. Then measure, cut to size and affix the remaining moulding lengths in the usual manner.

Door Jamb

Is the frame in which the door is secured to. The Jamb bears the weight of the door through its hinges.

Download the 'How to install a Door Jamb' flyer. 


Also referred to as Rod is a solid cylindrical piece of timber available in a variety of lengths. Large sized dowels are often used as hand rails, curtain rods. More finer dowels are widely employed in hobby and craft projects such as childrens toys. Mid-sized dowels are commonly utilised as support rods, towel rails, broom handles. 

Dressed All Round (DAR)

A piece of timber that has been machine finished on all four sides and is very smooth. Available in a variety of lengths and dimensions and is the "skeleton" of many renovation, carpentry and DIY projects.

Edging (coverstrap)

A piece of strapping used to finish off the edges of boards, shelving, bench tops and/or to cover the butted joints of sheet materials. Designs range from the minimalist square edge trim (DAR) to round edge and ribbed. 

External Corners

(Also known as external corner mould or corner guard)
External corner moulds serve to provide protection to external corners as well as covering and/or decorating any joint in lining materials (either timber paneling or sheet material).

Finger Jointed

Refers to lengths of wood joined end to end utilising micro-sized finger joint employing an interior grade adhesive whose strength and potential overall length is increased through the glue-bonds. 

Fly Bead

Is a rounded profile suitable for a range of trimming applications including windows and doors.


Glazing bead

A convex moulding which is placed at the edge of a pane of glass which holds it in place.


 Hardwood is wood from angiosperm trees have a more dense and complex structure than softwood – more pores and vessels. Porta’s range of Hardwood in a variety of profiles include Tasmanian Oak, Meranti and Whitewood.

See also Our Timber for more information about timber species


Softwood is wood from trees such as conifers. Softwoods are not necessarily softer than hardwoods. It is an affordable option of timber and comes in various grades including a finger jointed option. Porta utilise timber from the Pinus Radiata species which includes – Clear Pine, General Purpose Pine, FJ Raw Pine, Primed FJ Pine, Treated Pine.

See also Our Timber for more information about timber species

Insert Mould

Insert Moulds are generally fixed to a wall or door surface in a mitred configuration.  They are used to hide joins or seams but can be used for a purely decorative effect.

Laminated Panels

Is premium quality timber pieces edge-glued together in a huge press, precision-trimmed, pre-sanded and ready to use. They are extremely stable and suitable for many project creations such as storage, shelving, coffee tables and desks. 

Lineal Metre

Refers to the price per 1 metre length of timber.

For example if product A was $3.00 per l/m and the product A was a 3m piece the total cost for that product is $9.00.  


Medium density fibreboard is an engineered wood product.

Mitre Join

A join at a 90 degree angle and consists of two pieces of moulding cut at opposing 45 degree angles. When fitted together they should form a tight right angle. 


A classic style moulding that is well suited to the finishing of an internal corner. Fits snugly and can serve to mask or cover irregular gaps.

Panel Mould

Panel Moulds are generally fixed to a wall or door surface in a mitred configuration.  They are used to hide joins or seams but can be used for a purely decorative effect.

See also insert Mould

USEFUL VIDEO - How to install Panel/Insert Mould 



Serves to provide an attractive decorative boxed effect at the head of a window and can also be used as decorative wall trim in place of a Chair rail.


Picture Frame Mouldings

Picture Frame mouldings by Porta are decorative profiles which allow you to make customised picture and mirror frames.

View Picture Frame Mouldings 


Picture Rail

Fixed horizontally and running high around the perimeter of a room, these mouldings let you hang pictures and mirrors instantly. 

View Picture Rails in Decorative Trim range.



The term used when a material has been given a coat of water-based primer. Porta's Primed FJ pine has two coats of water-based primer and is ready to paint.



Is an internal rounded corner mould that fits snugly into an interior corner serving to mask or cover irregular gaps of abutting sheet material. Can also be used to finish floating floors. 



The routing process is to hollow out an area in the timber face.



A simple smooth-curved moulding traditionally used to finish an uppermost internal corner. Scotia can be used quite innovatively eg in decorative shelving, plaques or used in conjunction with other moulding to create a more decorative moulding.




A method of marking and cutting a piece of timber so that it sits flush against the other piece or surface.

View the 'How to Scribe' DIY video



A piece of moulding fixed along the bottom of a wall where it meets the floor. Serve as a decorative and functional trim around windows, doors and where the floor meets the wall. Skirting boards hide the gap between the wall and the floor and protect the wall from damage.

Go to Architraves & Skirting range

Or View the 'How to install Skirting' DIY video.



Shaped in a T it is designed for the with double doors, these mouldings are fitted to the outermost edge of one door. 



Tri Quad

Is an internal flat corner mould that fits snugly into an interior corner serving to mask or cover irregular gaps of abutting sheet material. Can also be used to finish floating floors. 




Refers to a thin slice/layer of wood which is wrapped around a piece of timber substrate.


Wind Mould

This is used to bridge the gap between a door or window frame and brickwork/walling. It not only serves as a trimming function but as the name suggests helps excludes the entry of wind driven moisture.