Kiln Dried Douglas Fir Internal Channel Siding Cladding

Kiln Dried Douglas Fir Channel Siding is a premium internal timber cladding option, perfect for creating clean, modern interiors with real timber character. Carefully kiln dried to reduce moisture content, Douglas Fir timber offers excellent stability and performance, making it ideal for internal walls, ceilings, and architectural features. The distinctive Channel Siding profile creates subtle, consistent shadow lines, adding depth and visual interest to your space without overwhelming the design.

Douglas Fir is known for its light, warm tones and distinctive straight grain, giving interiors a natural, textured finish. Its smooth surface and consistent quality make it easy to install and perfect for feature walls, vaulted ceilings, and contemporary interior projects. Whether used in a home, office, or commercial setting, Douglas Fir Channel Siding delivers a refined, high-quality finish that brings warmth and character to any interior.

Ready to fix and available in two options - First grade and Character:

• First Grade is sorted to include only the clearest (most knot free) boards with the straightest grain possible. A perfect choice for all modern and contemporary applications.
• Character will have a mixture of all top four grades, 1 through to 4 - some clear of knots and some straight grain, others with knots and some sloping grain. A perfect choice for all traditional/rustic applications, it gives a less uniformed look, without compromising its excellent durability properties.

End-Matching (Tongue and Groove) will allow you to place joints where they fall, instead of on the stud, allowing you to finish the job more quickly without sacrificing on quality and helps minimise wastage.

UK Timber works with the Treatex brand to enable us to offer you treatments and finishes for both internal and external applications. Our Treatex Douglas Fir Protection offers long lasting weather protection for external applications, whereas for internal applications our range of Treatex Hardwax Oils will enhance the woods natural appearance and characteristics. Should you wish to leave it to age gracefully, your boards will eventually turn to a beautiful silvery grey colour.

We offer the following section size:

• 142mm x 22mm - The overall width is 142mm, with the visible face measuring 132mm

If exposed to varying weather conditions before fitting your boards, they are likely to cup, warp and split; the ideal time to fit cladding to keep this to a minimum is between the months of October and April and within 7 to 14 days of delivery.

Priced per square metre and supplied in random lengths between 1200mm and 3600mm unless otherwise specified for an additional charge:

• Set lengths up to 3500mm - £15 ex VAT per sqm
• Set lengths above 3500mm - £18 ex VAT per sqm

This can be done by adding the 'Set lengths (Internal Cladding)' product to your basket (1 quantity = 1 square meter of cladding). You will need the same amount of cladding and set lengths in your basket to get the set lengths that you need so make sure to double check you have added the correct quantity. 

Please contact our Sales Team on 01536 267 107 should you have any issues.

Still unsure? We offer up to two samples of our cladding boards for a £5 inc VAT postage charge. Should you wish to then purchase cladding boards that are the same product as your samples, we will reimburse you the £5 postage charge upon ordering!*