Fall Window Maintenance: Getting Ready for a Canadian Winter

As the days get shorter and the first cold mornings roll in, it's worth taking a few minutes to walk around your home and check on your windows. A little attention now means a more comfortable home once winter settles in, and it gives you time to catch anything worth addressing before the coldest stretch of the season arrives. Here's what to look for.

Quick Answers

When is the best time to prepare your windows for winter?

Fall, ideally before the first hard freeze. Checking now gives you time to book a professional look if you find something more than a quick DIY fix.

How can I tell if my window has a draft?

Run your hand slowly around the frame edges and where the sashes meet on a breezy day, you'll usually feel it directly. A lit candle held near the same spots works too, since the flame will flicker where air is moving.

Why is there condensation between my window panes?

Condensation on the inside of the glass is just humidity meeting a cold surface. Fogging trapped between the panes means the seal on the insulated glass unit has failed, and that's a sign it needs a closer look, not just cleaning.

Can windows still be installed in the winter?

Yes. We install right through the winter, so if your inspection turns up something more than routine maintenance, there's no need to wait until spring.

Inspect for Drafts and Air Leaks

Run your hand slowly around the edges of each window frame and where the sashes meet, on a breezy day you may feel a draft directly. A lit candle or incense stick held near the same spots works too; a flickering flame can reveal a leak your hand might miss. Pay close attention to corners, meeting rails, and anywhere the frame meets the wall.

Condensation: Inside the Glass vs. Between the Panes

This is the distinction many homeowners misunderstand.

Condensation on the inside surface of your window, the side facing your room, is usually just a sign of indoor humidity meeting a cold surface. It's common, and often solved with better ventilation or a dehumidifier, not a window problem at all.

Condensation between the panes is a different story. If you see fogging or moisture trapped inside the glass itself, where you can't wipe it away, that means the seal on the insulated glass unit has failed and the gas fill between the panes has escaped. That's not a maintenance fix, it's a sign the unit has lost its insulating performance and is worth having assessed.

Clean and Inspect Hardware and Weatherstripping

Clear debris from tracks and sills, lubricate hinges and locks, and check weatherstripping for cracking, flattening, or gaps. This is the genuinely DIY-friendly part of fall prep, a few minutes with a vacuum and a tube of silicone lubricant goes a long way toward smoother operation and a tighter seal through winter.

Two Climates, Two Sets of Challenges

If you're along the coast, salt air and shifting humidity put extra wear on hardware and finishes over time, it's worth checking metal components a little more closely. Further inland, across the Mississauga, Montreal, and Ottawa areas and through Quebec, it's the swing between hard freezes and mild spells that stresses seals and frames the most. Either way, the checks above are your starting point.

When It's More Than Maintenance

If drafts persist after fresh weatherstripping, if you're seeing that between-the-glass fogging, or if a frame shows visible warping or damage, it's likely time for a professional look rather than another round of DIY fixes. And if a window's due for replacement, you don't need to wait for spring, we install through the winter, so there's no reason to put off a fix once you know you need one.

Don't Forget the Rebates

If a window does end up needing replacement, it's worth checking whether it qualifies for a provincial rebate before you book anything. We've put together a full breakdown by province here: Window and Door Rebates in Eastern Canada.

Ready to have a professional take a look before winter sets in? Request a free assessment, or reach out to your nearest location and we'll get you booked in.