Different Timber Finishes
There are various types of finishes to suit different timber applications and uses such as flooring, framing, appearance grade and packaging. MLC Group’s process usually starts with rough sawn timber that goes through a planer.
In Timber speak DAR is an abbreviation for dressed-all-round. This term refers is the end result of a process that gives timber its final appearance. The timber is “machined” in this context meaning it has been passed through a planer to be planed smooth on all sides. DAR is used in finishing applications, such as joinery and furniture making for example.
This when a sectional outline on the timber such as a shape is sliced along the grain to make a profile or moulding. These are detailed, shaped profiles machined with a moulder (a planer with 6 or more cutting blades) are often used in joinery and decoration 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 to form a “tongue” on one edge with a groove machined on the other edge allowing the boards to fit together, excluding 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 matching is applied to tongue and groove boards as a jointing profile to lock lengths together end-wise. Occasionally tongue and groove timber is supplied end-matched. This means that the end of the flooring boards are machined as well as the linear profile of the board. Therefore, as well as a tongue and groove on each side of the board, the ends also have a tongue and groove. When all the boards in end-matched timber profiles are fitted together, they lock on all four sides.
G4S is an acronym for “gauged 4 sides”. This can also be referred to as “planer gauged” timber. It can be machined with square corners or a rounded edge. This is commonly done for framing timber, to ensure a standard thickness and width. This finish of timber is popular among builders because of the smoother finish. This makes it easier to handle and lowers the chances of builders injuring themselves while handling it.
OPG (outdoor premium grade)
OPG Timber has a great appearance with occasional features that are excellent for high-end visual applications. This type of timber is referred to as “rougher headed” – a profile with very fine ribs. This profile will present fewer cracks in the boards as it ages. It will also accept paint and stain very well. OPG timber is produced from a high grade of timber, with minimal and widely spaced knots.
Pre-priming is a solution to protect timber from weather and UV degradation. Pre-primed products use low-cost solvent borne and quick drying paint applied in a factory or production line. At MLC we have a paint machine that applies the paint to all 4 sides of the boards as they are passed through to a conveyor-belt system. This finish is formulated to dry quickly so product can be promptly dried, 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.