Toronto winters are long and cold, and your windows and doors are the front line between your warm home and the weather outside. A little preparation each fall — and knowing when a draft means it’s time to upgrade — can save you real money and keep your home comfortable through the coldest months. Here’s a practical windows-and-doors checklist for GTA homeowners heading into winter.
Start with a draft audit
Before you do anything else, find where the cold gets in. On a windy or cold day, run your hand around the edges of every window and door. Feel for moving air at the frame, the sash, and where panels meet. A common trick: hold a lit candle or incense stick near the edges and watch for the flame or smoke to waver. Note every spot you find — those are your priorities.
The window checklist
Work through each window in the house:
- Check the weatherstripping. Look for cracked, flattened, or missing seals around sashes, and replace what’s worn.
- Inspect the caulking. Exterior caulk around the frame shrinks and cracks over time. Reseal gaps to stop air and water intrusion.
- Clear the weep holes and tracks. Debris blocks drainage and can cause moisture problems. Keep them clear.
- Lock every window. Locking a window pulls the sash tight against the seal — an easy, free efficiency boost.
- Look for fog between the panes. If you see condensation inside the glass, the sealed unit has failed and that window is losing heat.
- Consider heavier window coverings. Insulated curtains or cellular shades add a layer of protection on the coldest nights.
The door checklist
Now the doors — both entry and patio:
- Test the weatherstripping and door sweep. If you can see daylight around a closed door, cold air is pouring in. Replace worn seals and adjust or add a door sweep at the threshold.
- Check that doors close and seal squarely. A door that’s dropped or racked won’t seal evenly. On older homes, a settled frame is often the culprit.
- Inspect patio door rollers and locks. A panel that sticks or a lock that doesn’t pull tight means lost heat and security. (See our guide to the signs a patio door is failing.)
- Reverse ceiling fans and check the thermostat. Small comfort tweaks that complement a well-sealed envelope.
When maintenance isn’t enough
Weatherstripping and caulk are seasonal fixes, not permanent solutions. If you’re resealing the same drafty window every year, feeling cold air through a locked door, or seeing fog between the panes, the units themselves have reached the end of their life. At that point, upgrading to modern, energy-efficient windows and doors is the move that actually solves the problem — and stops you throwing money at heat that escapes anyway.
Modern triple-pane, Low-E, argon-filled windows and insulated, tightly-sealed entry and patio doors transform winter comfort. Instead of a cold, drafty room and a climbing heating bill, you get a warm, quiet, even temperature throughout the house. Homeowners across Scarborough and the GTA see the difference in the first cold snap.
Time it right for the rebate and the season
There are two reasons not to wait until the first snow. First, installation calendars fill quickly in the fall, so booking earlier means you’re warm before winter really bites. Second, Ontario’s Home Renovation Savings Program — which offers $100 per ENERGY STAR window and door opening — is scheduled to stop accepting applications on November 30, 2026, and a full rebate cycle takes months. If an upgrade is on your list, acting this season lets you stack that rebate with Arctic Vinyl’s own promotions before the window closes.
The bottom line
A fall checklist — a draft audit, fresh weatherstripping and caulk, clear tracks, locked windows, and squarely-sealing doors — keeps most homes comfortable through winter. But when the same drafts return year after year, or you spot fog between the panes, it’s a sign the windows and doors need replacing, not just resealing. Upgrading before winter delivers immediate comfort and lets you capture this year’s rebates.
Getting your home winter-ready? Explore our windows and doors, or book a free assessment — and ask about the rebates and no-payment financing available now, before the season fills up.
Frequently Asked Questions
On a cold or windy day, run your hand around the edges of each window and door to feel for moving air, or hold a lit candle or incense stick near the edges and watch for the flame or smoke to waver. Mark every spot — those are the leaks to seal or the units to upgrade.
Yes, if the units are old or failing. Modern triple-pane, Low-E windows stop the drafts and heat loss that drive up winter heating bills, and installing before winter means you’re comfortable for the coldest months. Booking early also beats the fall rush and captures current rebates.
Free and low-cost steps help: lock every window to tighten the seal, replace worn weatherstripping, reseal cracked exterior caulk, and add insulated curtains or cellular shades. These are seasonal fixes, though — if drafts persist every year, replacement is the lasting solution.
If you’re resealing the same drafts every year, feel cold air through a locked window or door, or see fog between the panes, the units have reached the end of their life. Fresh weatherstripping and caulk are temporary; a failed seal or a settled, drafty unit calls for replacement.
Yes. Ontario’s Home Renovation Savings Program offers $100 per ENERGY STAR-certified window and door opening, requiring a home energy assessment and at least two eligible upgrades. It’s scheduled to stop accepting applications on November 30, 2026, and cycles take months, so plan ahead.