Moulded Douglas fir handrail 50x50 mm

Moulded handrail in solid Douglas fir, 50x50 mm, with a 21x5 mm groove. Class 3 wood, naturally moisture-resistant and suitable for indoor and sheltered outdoor use. Available in 5 lengths: 100 cm, 150 cm, 195 cm, 250 cm, 300 cm. Supplied unfinished; can be cut to length. An exterior finish (oil, woodstain or varnish) is recommended for outdoor exposure. Stainless-steel fixings are required outdoors. Order compatible wall brackets for the 21x5 mm groove separately.

Length (cm)

Reference RBD150

€54.79 incl. tax

In stock Dispatched within 5 days

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50x50 mm moulded Douglas fir handrail, class 3, for indoor and sheltered outdoor use

This moulded solid Douglas fir 50x50 mm handrail has a 21x5 mm groove for mounting on standard wall brackets. Douglas fir (Pseudotsuga menziesii) is a softwood with class 3 durability without treatment: it naturally resists fungi and wood-boring insects, making it suitable for indoor and sheltered outdoor use — under a canopy, covered pergola or enclosed gallery. A protective finish is essential for unsheltered outdoor use with direct exposure to rain.

The 50x50 mm moulded cross-section softens the corners of the square profile for a more comfortable grip. Douglas fir has a warm reddish-brown colour and pronounced grain, which can be enhanced with oil or a clear woodstain. Its moderate density (~530 kg/m³) makes it easy to handle and install, while providing sufficient strength for everyday use on a staircase or balustrade.

Five lengths are available: 100 cm, 150 cm, 195 cm, 250 cm, 300 cm. Order brackets and fixings separately; they must be compatible with the 21x5 mm groove. For outdoor use, choose stainless-steel fixings to prevent corrosion stains.

Key features

Feature	Description
Material	Solid Douglas fir (Pseudotsuga menziesii)
Cross-section	50 x 50 mm moulded
Groove	21 x 5 mm — compatible with standard brackets
Durability class	Untreated class 3 — for indoor and sheltered outdoor use
Density	~530 kg/m³
Available lengths	100 cm, 150 cm, 195 cm, 250 cm, 300 cm
Brackets and fixings	Not included — order brackets for a 21x5 mm groove separately (stainless steel recommended outdoors)
Use	Indoor and sheltered outdoor use — finishing required for unsheltered outdoor use
Finish	Unfinished wood — exterior oil, woodstain or varnish recommended

Key points

✓ Natural class 3 durability: resistance to fungi and insects without preservative treatment — suitable for sheltered outdoor use
✓ 50x50 mm moulded cross-section: softened corners for a comfortable grip; profile compatible with brackets for a 21x5 mm groove
✓ Versatile use: indoor staircases, covered terrace handrails, pergola or gallery balustrades
✓ Lightweight, easy-to-handle wood (~530 kg/m³): easy to install and trim on site
✓ Customisable: unfinished wood suitable for exterior oil, woodstain or varnish

Installation advice

Choose brackets compatible with the 21x5 mm groove. Position them at regular intervals, with a maximum spacing of 80 cm between support points. Install the handrail 80 to 100 cm above the tread nosings or finished floor.

For outdoor use, use A2 stainless-steel fixings at a minimum for the brackets and all other fastening points. Ordinary zinc-plated steel screws corrode when exposed to moisture and the acidic tannins in Douglas fir, leaving permanent stains on the wood. Ideally, apply the finish before installation. After cutting, treat the cut ends immediately — these are the areas most exposed to moisture.

Care and protection

Indoors, a surface finish improves resistance to dirt. In sheltered or partially exposed outdoor locations, regular protection is essential to limit greying and help prevent surface cracks. Recommended options:

Exterior wood oil: penetrates the fibres, nourishes the wood and gives a natural look; reapply every 1 to 2 years
Exterior woodstain: light film-forming protection, can add colour, lasts 2 to 4 years depending on exposure
Exterior varnish: thick protective film, lasts 3 to 5 years; requires complete stripping before reapplication

Without a finish, Douglas fir turns grey within 6 to 12 months — a purely cosmetic change that does not affect its mechanical properties. For routine care in sheltered outdoor areas, an annual clean with plain water and a soft brush is sufficient.

WoodUp tip

Before you buy: the 50x50 mm moulded Douglas fir handrail is compatible with brackets for a 21x5 mm groove. It is one of the few handrails suitable for sheltered outdoor use (class 3) with an appropriate finish. Use stainless-steel screws outdoors. Treat every surface before installation, including the groove. Wall fixings are not included.

Frequently asked questions

How does class 3 Douglas fir differ from the other woods in the range?

Douglas fir is the only moulded wood in the range suitable for sheltered outdoor use without preservative treatment. Moulded beech and oak are hardwoods for indoor use only: they are considerably more abrasion-resistant but vulnerable to outdoor moisture. Fir is suitable only for indoor use. Douglas fir therefore falls between them, offering natural moisture resistance but lower density and hardness than the hardwoods.

Can this handrail be used outdoors in direct exposure to rain?

For unsheltered outdoor use with direct exposure to rain, an exterior finish is essential for lasting protection. Unfinished class 3 Douglas fir holds up well in sheltered outdoor locations (without direct contact with rainwater), but full exposure accelerates greying and may eventually cause surface cracks. An exterior wood oil or woodstain reapplied every 1 to 2 years is the most suitable option.

Which brackets should I use for this moulded handrail?

The brackets must fit a groove 21 mm wide and 5 mm deep. For outdoor use, choose stainless-steel or hot-dip galvanised steel brackets to prevent corrosion. Painted steel brackets are for indoor use only.

Why choose Douglas fir rather than fir for an outdoor staircase?

Fir is suitable only for indoor use — without preservative treatment, it deteriorates quickly outdoors, even under shelter. Class 3 Douglas fir naturally resists moisture and wood-boring insects, making it a suitable choice for staircases or balustrades exposed to outdoor conditions.

Do the cut ends need treating after trimming the handrail?

Yes, absolutely. Cut ends are the most permeable to moisture — wood absorbs water much faster there than through planed surfaces. After cutting, sand the end with 120-grit abrasive and immediately apply a coat of oil or woodstain, even for indoor use, to reduce the risk of cracking.

Is this moulded handrail easy to cut to length?

Yes. Douglas fir is a relatively soft softwood (~530 kg/m³) that is easy to cut with a circular saw or mitre saw, without specialist tools. Unlike oak or beech, it does not need specific pre-drilling for the screw securing it to the brackets — a standard wood screw will hold securely.

Brackets compatible with a 21x5 mm groove

Oils, woodstains and varnishes for exterior wood