Central Heating and Solid Wood: How to Protect Your Desk and Table Through Autumn and Winter
When the cold sets in, we switch on the heating, close the windows and spend more time indoors. For us that means comfort; for a solid wood piece of furniture it is a full-blown climate change. Wood is a living material: it absorbs and releases moisture depending on its surroundings, and in winter indoor air can drop below 30 % relative humidity. If you do nothing, the result can be small cracks, joints that open up or a finish that looks dull.
The good news: protecting your desk or dining table doesn't call for expensive products or hours of work. A handful of habits is enough.
What happens to solid wood when the heating comes on
Wood is always trying to balance itself with the moisture in the surrounding air. When the room dries out, the fibres lose water and the piece shrinks slightly; when humidity returns (in spring, or when you air the room), it expands again. That “breathing” is perfectly normal and part of the charm of a natural tabletop.
Trouble starts with sudden or localised changes: a radiator 20 cm from the top, a fan heater pointed at the table, or low winter sun pouring straight through the window. One area dries out much faster than the rest, and that tension is what causes splits or slight warping.
5 ways to protect your wooden furniture this winter
1. Keep it away from direct heat
Leave at least 50 cm between the furniture and radiators, stoves, fireplaces or heat pumps running in heating mode. If your desk needs to sit by the window (a great idea for working in natural light), make sure the radiator underneath isn't blowing hot air straight onto the edge of the top.
2. Keep an eye on indoor humidity
The sweet spot for wood (and for your throat and skin) is a relative humidity of 40 to 60 %. A hygrometer costs very little and takes the guesswork out. If your home reads very low for weeks on end, a humidifier or even a few houseplants will help keep it steady.
3. Air the room, but avoid icy draughts
Opening the windows for 10 minutes a day refreshes the air without chilling the house. What you want to avoid is leaving a window open for hours with the table right in the draught: cold, damp outside air meeting dry indoor heat is exactly the kind of abrupt change that stresses wood.
4. Feed the finish before winter
Autumn is the best time to check the finish. Run your hand across the top: if it feels rough or you spot dull patches, apply a thin coat of oil or wax suited to your finish, let it soak in and wipe off the excess with a cotton cloth. A healthy finish acts as a barrier and slows down moisture loss.
5. Watch what you put on it
Winter means hot mugs, hot-water bottles and laptops left charging for hours. Use coasters and trivets, and don't leave chargers or devices that warm up sitting on the same spot every day. For daily work, a desk mat protects your working area without hiding the beauty of the wood.
What if a small crack has already appeared?
Don't panic. Fine surface cracks that show up in winter often close up partly once humidity rises again. First fix the cause (move the heat source away, raise the humidity) and give it a few weeks. If the crack is still there, a coat of oil helps seal it and even out its appearance. For deep cracks or open joints, it's best to get in touch with us before using fillers or products that may be hard to remove later.
Standing desks and wood: one extra detail
If you work at a solid wood standing desk, use the change of season to check the frame too: make sure the screws joining the top to the base are tight, as the wood's slight winter shrinkage can loosen them a little. Run a full up-and-down cycle to confirm the motor runs smoothly and that no cable is rubbing against the radiator or the wall. The same goes for fixed-height desks and tables: tightening the hardware once a year is plenty.
Models such as our ash wood standing desk are made with solid tops and finishes designed for everyday use, but like any natural piece they appreciate a little seasonal care.
Frequently asked questions
Is it normal for my solid wood table to creak or shift in winter?
Yes. Small noises and movement come from the wood's natural shrinkage as it loses moisture. If you also notice some play, check and tighten the hardware.
How often should I oil my wooden desk?
It depends on how much you use it, but once or twice a year is usually enough. Autumn, before the heating goes on, is the ideal moment.
Can I put my desk next to the radiator if there's nowhere else?
Try to leave at least 50 cm of space. If that's not possible, a radiator cover or a deflector that directs hot air upwards greatly reduces the impact on the top.
Can a humidifier damage wood?
Not if you keep humidity in the 40–60 % range. What damages wood is direct water or very high humidity over long periods, so don't point the humidifier at the furniture.
Are cracks caused by dry air covered by the warranty?
Every case is different. If you spot a significant crack, send us a few photos and we'll help you find the best solution for your piece.