Question 1

What is the difference between the nominal size and the finished size?

Accepted Answer

The nominal size of 38mm x 150mm is the rough sawn measurement before the board is machined and profiled. The finished size of 32mm x 145mm is what you actually receive after planing and processing, which is the measurement to use when planning your project.

Question 2

Do these decking boards come pre-treated?

Accepted Answer

These boards are not listed with a factory preservative treatment, so we recommend applying a suitable exterior preservative, decking oil, or stain shortly after laying, paying particular attention to end grain cuts made on site. This will protect the timber and maintain its appearance over time.

Question 3

What length should I order for a standard garden deck?

Accepted Answer

The 3.6m length suits most standard garden deck widths and produces less waste on smaller projects. The 4.8m board is better suited to larger or longer runs where fewer joints are desirable. Measure your joist span carefully and add a small allowance for trimming before ordering.

Property	Detail
Material	Softwood timber
Nominal Size	38mm x 150mm
Finished Size	32mm x 145mm
Length(s)	3.6m (12ft), 4.8m (16ft)
Profile	Decking board (flat face)
Use Class	Exterior / UC3

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Decking Boards

Premium Decking Board 38mm x 150mm (32mm x 145mm )