American White Oak PSE (Planed Square Edge) supplied at a 25mm nominal thickness with a 20mm finished size, machined in-house at our South Wales yard. A dense, stable hardwood suited to visible interior joinery, furniture, and stair components where a clean, accurate finish is required.

Specifications

Property	Detail
Material	American White Oak (Quercus alba)
Finish	Planed Square Edge (PSE)
Nominal Size	25mm thickness
Finished Size	20mm thickness
Length(s)	2.4mt 2400mm
Profile	Square edge, smooth face
Supplied As	Solid timber, not laminated

What it's used for

• Stair components including treads, risers, and string capping's where a hardwood face is specified
• Window boards and internal sills requiring a stable, knot-free appearance
• Shelving and cabinetry panels where strength and a fine finish are both priorities
• Bespoke furniture components and interior joinery details finished with oil, lacquer, or hardwax

Fitting and handling

Allow the boards to acclimatise in the room where they will be fitted for at least five to seven days before fixing, particularly in centrally heated interiors where moisture content fluctuates. Fix using appropriate adhesive or countersunk screws, ensuring fixings are set back from edges to prevent splitting in this dense hardwood. American White Oak responds well to oils, hardwax finishes, and clear lacquers applied to a clean, sanded surface, so avoid contamination from handling oils during installation.

FAQ

What is the actual finished thickness of this American White Oak PSE board?

The finished thickness is 20mm. The 25mm figure is the nominal sawn size before planning. This is standard practice for PSE timber and should be factored into any design or rebate sizing.

Is this American White Oak suitable for stair treads?

These boards are a useful component for stair joinery details such as string capping or riser facings, but at 20mm finished thickness they are not typically specified as structural stair treads, which generally require greater depth. Contact Nottage Timber Merchants if you need thicker sections machined to order.

Can I order American White Oak PSE cut to a custom length or width?

Boards are listed at 2.4 mt lengths  but Nottage Timber Merchants machine timber in-house in South Wales and can accommodate reasonable dimensional adjustments where possible. Get in touch directly to discuss your requirements before ordering.

Browse our full range of oak mouldings and oak timber sections for complementary profiles and components. Nottage Timber Merchants offer local delivery to Bridgend and across South Wales, with options to suit trade and retail customers.