Douglas Fir Cladding

About Douglas Fir Cladding

Douglas Fir is one of the most stable softwoods you can clad a building in: it stays straight and true, has a long, even grain and a warm reddish pink colour. We stock it in seven profiles, several in natural and black, all stocked in our warehouse and delivered across Ireland.

Douglas Fir Cladding Profiles

Start with the profile, which sets the look of the wall. On the product page you then choose the length; longer boards mean fewer joints on long runs. Enter your wall area in the calculator there and it works out how many boards you need; the cart adds the fixings and extras.

Traditional Overlapping Profiles

These boards overlap each other, so every course sheds rain onto the one below. They suit sheds, garden rooms, barns and any building where you want a classic timber look.

• Feather edge: tapered 200×19.5 mm boards, thick at the bottom edge and thin at the top, for a rustic, deep shadowed facade. Available in natural and black, with the black also in a narrower 140 mm board for a finer pattern of lines.
• Shiplap: 145×18 mm boards with a rebate that locks each board over the next, giving a neat shadow line on horizontal cladding.
• Half lap: wide 195×18 mm boards that overlap by half their thickness, for broad, simple elevations with fewer lines.

Flush and Open Joint Profiles

For a flatter, more architectural wall, these boards sit side by side rather than overlapping.

• Tongue and groove: 195×18 mm boards that lock together into a tight, flush face. Fix them vertically, horizontally or on the diagonal.
• Square edge: plain 200×20 mm boards for board on board cladding, or fixed with a gap for an open joint look.

Contemporary Slatted Profiles

These profiles create strong shadow lines, the look behind many modern extensions and garden rooms.

• Triple slatted: 130×19 mm boards with three slats machined into each face, for a linear pattern without fixing individual battens. Available in natural and black.
• Rhombus: narrow 65×20 mm boards with angled edges, fixed with an open gap so each board casts a crisp shadow and the wall can breathe.

Why Choose Douglas Fir Timber Cladding

• Stability: resists warping and cupping, which matters most on open joint walls where every board is on show.
• Durability Class 3: natural resin adds weather resistance, with a service life of 15 to 25 years when detailed well.
• Light and easy to work: quick to cut, handle and fix.
• Colour: warm reddish pink tones that deepen with age.

For a more durable softwood, compare larch cladding. For a lighter, finer finish, see cedar cladding.

Installing Douglas Fir Cladding

• Fix to treated battens over a breather membrane, with a ventilated gap of at least 20 mm behind the boards.
• Use A2 or A4 stainless steel fixings and pre-drill near the board ends.
• A little resin can bleed from fresh cuts and knots. It stops as the timber dries.

Treating Douglas Fir Cladding

Douglas Fir lasts longest outdoors with a finish, especially on exposed walls. Left bare, it weathers to silver grey. We recommend a UV protective oil made for softwoods within the first few months of fixing, refreshed every two or three years, to protect the timber and keep the warm colour. See our wood oils and stains.

For every species and profile we stock, browse all our timber cladding.