Machining And Finishes Of Timber

There are various machining and finishes to suit different timber applications for uses such as flooring, framing, appearance grade and packaging. Genia’s process starts with rough sawn timber before being machined or “dressed” through a planer.

DAR Timber

DAR is dressed-all-round timber. This term refers to the process that gives timber its final appearance. The timber is planed with a smooth finish on all four sides. DAR is typically used in appearance applications, such as joinery and furniture making for example.

Profiled

Profiled timber is a sectional outline on the timber which a planer will then produce the contour along the grain to make a profile or moulding. These are detailed, shaped profiles cut with a moulder (a machine with 6 or more cutting blades) that are used for decorative profiles as part of interior finishes. Timber can also be profiled for weatherboards and flooring (tongue and groove).

T & G (Tongue and Groove)

To make tongue and groove timber, timber is machined on one edge with a groove machined on the other edge allowing the boards to fit together, preventing air and light from passing between aligned boards. This is used for flooring.

TGV (Tongue and Groove V-joint)

This is similar to tongue and groove timber but has a slight bevel on the face edges to produce a V where the board edges meet. This type of timber is most commonly used for internal wall panelling and ceiling sarking. The V provides a feature line that detracts the eye from detecting the crack (or the varying width of the crack) between boards or panels.

End-Matched

End matched timber is tongue and groove boards that also have a jointing profile to lock lengths together end-wise. Occasionally tongue and groove timber is supplied end-matched. The end of the flooring boards are machined as well as the linear profile of the board. Therefore, one end of the board has a tongue and one end has a groove. When all the boards are fitted together at the ends, they lock on all four sides.

G4S or PG Timber

G4S (Gauged4 sides) - also referred to as “planer gauged” timber. It can be machined with square corners or with a rounded edge. This is commonly done for framing timber, to ensure a standard thickness and width, called ‘gauged’. This finish of timber serves two purposes, to achieve a more uniform size, and ease of handling in construction due to the smoother finish.

OPG (outdoor premium grade)

OPG Timber is an appearance grade timber, with occasional well-spaced features (small, sound tight knots, small resin pockets) that is excellent for high-end visual applications. This type of timber is rougher-headed, which means fewer cracks as it weathers and a uniform finish. It accepts paint and stain very well. OPG timber is machined with very fine ribs. It is usually kiln-dried and exterior treated. You will find OPG grade used in high-end decking and pergola jobs, where a nicer finish is required

Pre-primed timber

This is a solution to protect timber from weather and UV degradation. Pre primed products are solvent borne; quick drying factory applied products. These are formulated to dry quickly therefore they can be promptly handled and stacked for transportation. For exterior applications, it can be used for weatherboard, or applied to pickets and balustrades. In interior applications, mouldings can be pre-primed to speed up the decorating process by only needing a topcoat.

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