The safest way to protect patio furniture from a Canadian winter is to clean it thoroughly, dry it completely, then move it indoors or under a breathable, tied-down cover before the ground freezes for good. Skipping that step is one of the most common, and costliest, fall maintenance mistakes homeowners make. A single freeze-thaw cycle can crack sealed wood, corrode metal frames and turn ordinary plastic chairs brittle enough to snap. With overnight temperatures already dipping toward freezing across much of the country, this is the window to get it done. Retailers who deal with outdoor furniture year-round generally point to the same marker: once temperatures are reliably dropping toward 0 C, it is time to act, and in colder regions such as Ontario, that usually means starting sometime between late September and mid-October, according to Oakville Home Leisure. The steps below apply to almost any backyard set, whether it is a wood dining table, a metal bistro set or a resin wicker sectional, and none of them require special tools or climbing anything, just an afternoon, some mild soap and a dry place to put things.
- Check the forecast and set a deadline. Watch for the first stretch of nights consistently near or below 0 C. Oakville Home Leisure recommends having furniture cleaned and stored, or at least covered, before that point, since repeated freezing and thawing is what actually causes the damage, not cold weather on its own.
- Wipe everything down first. Before deciding what needs deep cleaning, give every piece a quick wipe with a damp cloth to clear off surface dirt, pollen and bird droppings, as Canadian Home Leisure suggests, so you can see what you are actually working with.
- Wash frames with mild soap and water. For a proper clean, use warm water and a mild dish soap on metal and plastic surfaces, and a soft-bristled brush to get into wicker weave and joints, per Wicker Park’s storage guide.
- Dry everything completely before it goes anywhere. Let pieces air-dry fully in the sun rather than packing them away damp. Wicker Park is blunt about why this matters: moisture trapped under a cover or in storage is what leads to mildew on cushions and rust on frames.
- Make small repairs while you are at it. Tighten any loose bolts or screws, sand down spots of surface rust, and touch up paint or sealant where it has worn through, advises Wicker Park. It is far easier to do this now than after a winter of exposure has made it worse.
- Treat wood separately, especially teak. Clean wood furniture thoroughly and apply a specialty teak oil, or an acrylic sealant for other wood types, before storing it, according to Canadian Home Leisure. Wood left untreated absorbs moisture and is prone to cracking through repeated freeze-thaw cycles.
- Know which metal can stay outside. Wrought iron needs any rust scrubbed off with a wire brush and a coat of protective paint before winter. Stainless steel, hot-dip galvanized steel and powder-coated aluminum are more winter-tolerant and can generally stay outdoors under a proper cover, per Canadian Home Leisure.
- Sort your wicker by type. Synthetic, resin-based wicker (often listed as HDPE) is built to handle harsh weather and can stay outside, ideally under a cover, both retailers note. Natural wicker or rattan is a different story: it is not weather-resistant and needs to come indoors.
- Bring plastic furniture inside. This one is not optional. Canadian Home Leisure warns that freezing temperatures make plastic brittle enough that it can break, so plastic chairs, tables and storage bins should be stored indoors, not left out under a cover.
- Store cushions and fabric separately, and indoors. Vacuum cushions and pillows to remove dust, sand and any hidden bugs, then wash removable covers according to the manufacturer’s instructions. Wicker Park recommends a cool, dry spot such as a basement or closet, and Canadian Home Leisure adds that mildew spots can be treated with a diluted bleach solution or a soap-and-white-vinegar mix. Never pack away a damp cushion.
- Pick a storage spot that keeps furniture off wet concrete. A garage, shed or basement is the best option; if using a basement or garage floor, elevate furniture slightly to stop it from wicking up moisture. A climate-controlled storage unit is worth considering for delicate pieces like natural wicker or glass tabletops, which are both more prone to cracking in extreme cold.
- Cover anything staying outside properly. Use a waterproof but breathable cover with tie-downs, never a plastic tarp laid directly on the furniture, since that traps moisture underneath rather than keeping it out. Leave a small gap between the bottom of the cover and the ground for airflow, and never flip tables or chairs upside down for storage: water can pool in drainage holes and, once frozen, crack or even burst aluminum framing.
None of this takes more than an afternoon, and it is one of the cheapest pieces of fall home maintenance there is, an hour or two of cleaning and sorting now against the cost of replacing a cracked wood table or a set of rusted-through chairs by spring. Once everything is clean, dry and either indoors or properly covered, the job is done until the snow melts.
