Why Cedar Responds So Well to a Little Attention

Cedar is one of the finest timbers for British gardens. It is naturally resistant to rot and insect attack, it holds its shape through damp winters, and it weathers to a soft silver-grey rather than turning brittle. That combination makes it a favourite for outdoor tables and chairs, the trim on cedar garden rooms, shepherd hut steps and window boxes, and cottage garden benches that live outside all year.

Left entirely alone, cedar will still last, but its surface dries, the grain lifts, and thin surface cracks collect dirt and moisture. A careful sanding followed by a suitable oil brings back that warm honey colour and, more importantly, feeds the timber so water beads on the surface instead of soaking in. The whole job is gentle, unhurried work that suits a bright spring afternoon, and it is the single best way to extend the life of a piece you would rather not replace.

The Kit Worth Having to Hand

• A random orbital sander for flat tops and seats, plus sanding blocks for curved arms and slats
• Sandpaper in 80, 120, 180 and 240 grit, and a fine abrasive pad for between coats
• A stiff hand brush, a vacuum with a soft brush head, and plenty of lint-free cloths
• White spirit for wiping away dust and old grime
• Tung oil or a good quality clear furniture oil, applied with a 50mm brush or a folded cloth
• Nitrile gloves, a dust mask, a drop sheet, and low-tack painter's tape for metal fixings
• A breathable, fleece-lined cover sized for the piece

One caution: avoid wire brushes and coarse abrasive wheels on cedar. The timber is soft and the brush will tear the softer bands between the growth rings, leaving a permanently ridged surface.

Sanding Back to Clean, Sound Timber

Work with the grain, always. Start with 80 grit only where grey, weathered patches need cutting back. Everywhere else, begin at 120. Move through 120, then 180, and finish at 240 on tabletops, armrests and anywhere hands will rest.

Keep the pressure light. Let the paper do the work. On turned legs and curved slats, work around the shape rather than across it, and use a folded piece of paper to reach into corners where a sander cannot safely go.

Mask the metal. Tape over bolts, hinges and brackets before you begin. Sandpaper clogs on metal and a slipped sander can score a fitting you cannot easily replace.

Lift the grain before oiling. Wipe the whole piece with a cloth dampened with clean water, let it dry for an hour or two, then give it a light pass with 180 grit. This raises the little fibres that would otherwise stand up under the first coat of oil and leave the surface feeling rough.

Clean thoroughly. Vacuum, brush out the joints and slat gaps, then wipe with white spirit. Any dust left behind turns into a muddy paste once oil is applied.

Choosing and Applying the Right Oil

Tung oil is the traditional choice for cedar and remains hard to beat. It penetrates deeply, cures to a subtle satin sheen and can be topped up year after year without stripping. Clear furniture oils and Danish oil blends also work well, though check whether they contain varnish, as these build a film that eventually flakes. Avoid raw linseed oil, which dries slowly in cool, damp conditions and can encourage mould, and avoid thick exterior varnishes altogether. A varnish film on softwood cracks, traps water beneath it and is very awkward to repair.

Choose a dry day above 10°C and work in the shade rather than full sun. Apply thin coats with the grain, allow the oil to soak for fifteen to thirty minutes, then wipe off every trace of surplus. Pools of oil turn tacky and attract grit. Leave twenty-four hours between coats, de-nibbing lightly with a fine pad in between, and aim for two or three coats on new or very dry timber. The piece will feel dry to the touch within a day but will continue to cure for a week, so keep it out of heavy rain until then. After that, a single fresh coat each spring is usually enough; if water stops beading on the surface, it is time to oil again.

Protecting Cared-For Pieces with Covers

Oiling slows the weather, but a good cover stops it. Choose a breathable, fleece-lined cover rather than a plastic tarpaulin. Plastic traps condensation against the timber, which is exactly the damp condition cedar dislikes most. A breathable cover lets vapour escape while keeping rain and leaf litter off.

• Let furniture dry fully before covering it; never cover wet timber
• Raise pieces off the ground on blocks or a spare pallet so air moves underneath
• Use the cover's ties so wind cannot flap it against the surface
• Store cushions, parasols and small accessories indoors, not under the cover
• Interleave stacked chairs with cloth to stop frames rubbing

A cedar garden room or shepherd hut makes excellent winter storage. Stand furniture on a dry floor, away from the walls, and leave a little space between pieces for air to circulate.

A Seasonal Rhythm That Keeps Cedar Looking Well

In spring, inspect joints and fittings, clean the surface with mild soapy water, rinse, dry, then sand and oil. Through summer, wipe up spills and bird droppings promptly rather than letting them bake on. In autumn, clean and dry everything, fit covers, and clear leaf litter from around the base of benches and hut steps, where trapped debris holds moisture against the timber. In winter, check monthly: brush off snow rather than letting it sit, lift covers on mild dry days to air the wood, and treat any mould spots with a dilute vinegar solution before re-oiling.

Treat the task as routine rather than restoration and it never becomes a chore. An hour of sanding and a coat of oil in spring, a decent cover in autumn, and cedar furniture will comfortably outlast the fence, the shed and most of the plants around it.