Redwood tongue and groove flooring boards in 25mm x 150mm offer a solid, traditional timber floor suited to domestic and light commercial use. Machined from kiln-dried Scandinavian redwood, the interlocking profile creates a tight, stable surface with a.

Specifications

Property	Detail
Material	Scandinavian redwood (Pinus sylvestris)
Treatment	Kiln dried
Nominal Size	25mm x 150mm (6 x 1 inch)
Lengths Available	3.6m (12ft), 3.9m (13ft), 4.5m (15ft), 4.8m (16ft)
Profile	Tongue and groove
Use Class	Internal flooring

What it's used for

Suspended timber ground floors and first-floor decking in residential properties
Loft boarding and subfloor installations where a solid, load-bearing surface is needed
Home offices, studios, and workshop floors requiring a clean, durable finish
Renovation and replacement work where existing T&G boards need like-for-like matching

Fitting and handling

Allow the boards to acclimatise in the room for at least 48 hours before laying, keeping them flat and away from direct heat sources or damp. Secret nail or screw through the tongue at each joist crossing, using a minimum of two fixings per board per joist. Once laid, the surface can be sanded and finished with a hardwax oil, floor varnish, or wood stain to suit the space.

FAQ

Can these redwood T&G boards be used as loft boards?

Yes. At 25mm thick, these boards are a common choice for loft boarding over joists as well as subfloor use. Check your joist centres first and ensure the boards span at least two joists without unsupported edges. They are sold in the Subfloor and Loft Boards category at Nottage Timber Merchants for exactly this reason.

How much should I order to allow for waste?

A general allowance of 10 to 15 per cent for cutting waste and board selection is standard for T&G flooring. In rooms with alcoves, chimney breasts, or angled walls, allow towards the higher end.

Nottage Timber Merchants supplies these boards alongside a full range of subfloor and loft boarding options available at Subfloor and Loft Boards. We serve trade and retail customers across South Wales, with next-day delivery available to the Bridgend area and beyond.

Subfloor & Loft Boards

Redwood Tongue & Groove Flooring Boards 25mm x 150mm