Drafty windows and doors are one of the most common complaints we hear from homeowners across Toronto and the GTA, especially during winter.
You’re sitting on the couch, heat is running, but there’s still a cold breeze near the window. Or you stand close to the door and feel air slipping in, even when everything is shut properly.
Most people assume this means full replacement.
That’s not always true.
Some drafts are easy fixes. Others are signs of deeper problems that repairs won’t solve. In this guide, we’ll walk you through how to fix drafty windows and doors, what causes them, and how to know when replacement is the smarter option.
What Causes Drafty Windows and Doors?
Drafts don’t appear overnight. They usually develop slowly due to wear, movement, or age.
The most common reasons include:
- Worn-out weatherstripping
- Gaps around window or door frames
- Poor or old installation
- Warped frames
- Old single-pane glass
- Shrinking materials due to temperature changes
In Toronto homes, especially older ones, seasonal expansion and contraction make these issues worse over time.
How to Check Where the Draft Is Coming From
Before fixing anything, you need to locate the source.
Simple ways to detect drafts:
- Run your hand around the window or door edges
- Hold a tissue or light paper near the frame and see if it moves
- Check during a windy day
- Look for visible gaps, cracked caulking, or loose seals
Once you know where the air is entering, fixing it becomes much easier.
Fix #1: Replace Old Weatherstripping
Weatherstripping is one of the most common and cheapest fixes.
Over time, it:
- Becomes brittle
- Loses flexibility
- Cracks or peels away
When this works:
- Drafts are minor
- Windows and doors are still in good condition
- No visible frame damage
Replacing weatherstripping can instantly reduce airflow and improve comfort.
Fix #2: Re-Caulk Around Frames
Caulking seals the gaps between the window or door frame and the wall.
If you notice:
- Cracked caulk
- Missing sections
- Gaps along edges
Then re-caulking can help.
Pro tip:
Always remove old caulk before applying new. Layering caulk over damaged material doesn’t last long.
Fix #3: Adjust or Repair Door Hardware
Sometimes the door itself isn’t the issue, the alignment is.
Loose hinges, worn latches, or a sagging door can prevent a proper seal.
Fixing includes:
- Tightening hinges
- Adjusting strike plates
- Re-aligning the door
This is common in older Toronto homes where doors settle over time.
Fix #4: Install Door Sweeps or Threshold Seals
If cold air comes in from the bottom of the door, a door sweep or threshold seal usually solves it.
These are especially useful for:
- Front doors
- Back doors
- Basement entrances
A properly installed sweep blocks air, dust, and moisture.
Fix #5: Window Film or Temporary Insulation (Short-Term)
For renters or short-term solutions, window insulation film can help.
It:
- Reduces drafts
- Improves indoor temperature slightly
- Is affordable
However, this is not a permanent solution and doesn’t improve long-term energy efficiency.
When Repairs Are NOT Enough
Sometimes, drafts are a sign of a bigger issue.
You may need replacement if:
- Frames are warped or rotting
- Glass is cracked or foggy
- Windows are single-pane
- Drafts return even after repairs
- Energy bills keep increasing
In these cases, fixing small issues only delays the inevitable.
Drafty Windows = Higher Energy Bills
Drafts force your heating and cooling system to work harder.
In Toronto winters, this leads to:
- Uneven room temperatures
- Cold floors and walls
- Higher heating costs
- Reduced indoor comfort
Upgrading to energy-efficient windows and doors can significantly reduce heat loss.
How New Windows and Doors Solve Draft Problems
Modern replacement windows and doors come with:
- Tight seals
- Multi-pane glass
- Improved insulation
- Better frame materials
When professionally installed, they eliminate drafts completely and improve comfort year-round.
Why Professional Installation Matters
Even the best windows and doors will feel drafty if installed poorly.
Professional installers ensure:
- Proper frame alignment
- Tight sealing
- Correct insulation
- No hidden air gaps
At Milano Windows & Doors Inc., we often fix problems caused by improper installation done years earlier.
Why Professional Installation Matters
Why do my windows feel drafty even when closed?
Worn seals, poor installation, or frame movement are common reasons.
Can drafty windows be fixed without replacement?
Yes, minor drafts can often be fixed with weatherstripping or caulking.
Are drafty doors a serious problem?
Yes. They affect comfort, energy bills, and indoor temperature balance.
How do I know if I need replacement?
If repairs don’t work or drafts return quickly, replacement is usually the better option.
Drafty windows and doors aren’t just uncomfortable; they cost you money every month.
Some problems are easy fixes. Others are warning signs that your home needs an upgrade.
If you’re unsure which category you fall into, getting professional advice can save you from unnecessary expenses.
👉 Milano Windows & Doors Inc. helps homeowners across Toronto find the right solution, whether it’s a simple repair or a full window and door replacement.
Comfort starts with the right fix.
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