Protecting
Protecting wood furniture through Canadian seasons
Solid wood is never quite static. It takes on moisture when the air is humid and gives it back when the air is dry, swelling and shrinking a little with each swing. In Canada, where forced-air heating dries indoor air all winter and summers can turn humid, managing that swing is the most useful thing you can do for a wooden piece.
Why wood moves at all
Wood is made largely of cellulose, which has an affinity for water, and it stays porous even after it is cut and finished. As the Canadian Conservation Institute explains, when humidity rises the wood absorbs water and swells slightly; when the air dries out it releases moisture and shrinks. Repeated or sharp swings are what cause splits, cracks, and a finish that crazes or lifts. High humidity carries its own risk: it can encourage mould on unfinished surfaces and inside drawers.
The single most useful number
Keep indoor relative humidity reasonably stable, broadly in the range of about 30% to 50% across the year. Steadiness matters as much as the exact figure: a piece held within a narrow band is far happier than one that lurches between extremes. A small digital hygrometer is the easiest way to actually know where a room sits.
A season-by-season plan
The Canadian calendar pushes humidity in predictable directions. The table below pairs each season's typical risk with a practical response.
| Season | Typical risk | What to do |
|---|---|---|
| Winter | Heating dries indoor air; wood can shrink and crack. | Run a humidifier toward the lower-middle of the range. Keep furniture clear of radiators and heat vents. |
| Spring | Humidity climbs as outdoor air warms; wood reabsorbs moisture. | Watch the hygrometer, ventilate on mild days, and avoid sudden jumps. |
| Summer | Higher humidity can swell wood; drawers may stick. | Use air conditioning or a dehumidifier toward the upper part of the range. A little candle wax helps sticky drawer slides glide. |
| Autumn | Conditions shift again before heating starts. | Clean and, if appropriate, re-oil before winter; re-check humidity. |
Placement is half the battle
- Keep wood out of direct sunlight. Sun fades finishes and dries the wood much like it dries skin and paper.
- Stay away from heat sources. Radiators, fireplaces, and air vents create dry pockets that are harder on a piece than the room average.
- Leave the back off the wall. A few centimetres of gap against an exterior or basement wall lets air circulate and reduces condensation risk.
- Mind the basement. Lower levels often run more humid; a dedicated dehumidifier helps a basement bedroom set hold steady.
Moving and storing
Sudden changes are harder on wood than slow ones, so let a piece adjust to a new room before judging how it behaves. When a table has removable leaves, store them near the table so they age in the same conditions and still fit when reinstalled. For longer storage, clean and dry the piece, give an oil finish a light coat if it needs one, and keep it somewhere with stable temperature and humidity rather than an unconditioned garage or shed.
References
The mechanism of moisture exchange and the value of a stable environment follow publicly available guidance from the Canadian Conservation Institute (Government of Canada), with seasonal humidity context consistent with published furniture-care notes on humidity and dryness.