Drafts, water damage, difficulty operating your window, poor caulking, and misalignment—these are the top signs that your window wasn’t installed properly. In Winnipeg, where temperature swings of 40 degrees in a day aren’t uncommon and winter wind chill routinely hits -40°C, bad window installation isn’t just an annoyance. It’s a direct hit to your Manitoba Hydro bill and your home’s structural integrity.

From century-old character homes in Wolseley with original windows retrofitted by previous owners, to new builds in Bridgwater where corners may have been cut, improper installation reveals itself quickly in our Prairie climate. In this article, we explore what poor installation looks like, the consequences of bad window installation in Winnipeg’s extreme weather, and what you can do to fix the problem before the next cold snap:

Key Takeaways

Poor window installation leads to water damage, air leaks, and poor energy efficiency.
Drafts, water damage, difficulty operating your window, sloppy caulking, and misalignment are all signs that your window was improperly installed.
You can seal gaps, fix some operational issues, and deal with some water damage yourself; for most things, however, you’ll need a professional to help fix the problem.
The pros at Nisby can replace your windows – and you’ll never have to worry about poor installation!

What Are The Common Signs Of Bad Window Installation?

1. Gaps & Drafts Around Your Windows

Air leaks and drafts, caused by gaps around your window, are one of the telltale signs of improper window installation. In Winnipeg’s climate—where winter winds sweep uninterrupted across the prairie and find every weakness—drafts are impossible to ignore. In the worst-case scenario, it’s a sign of the window being the wrong size for the rough opening, a common issue in older Winnipeg neighborhoods like West Broadway or the North End where original window openings don’t match modern standard sizes.

You can tell whether or not your windows are drafty using the candle test: Light a candle near your window on a windy Winnipeg day—perhaps when a Colorado low is blowing through. If the candle flickers or the smoke moves horizontally, you’ve got a draft that will cost you dearly during January’s deep freeze.

2. Water Damage Or Leaks Near Windows

When a window is improperly installed, the seal between the window panes may be broken. This leads to air moving between panes, cooling or heating them. As the air changes temperature, condensation forms—particularly problematic in Winnipeg, where cold exterior glass meets warm, humid interior air for months at a time.

Water damage and leaks can also be caused by the gaps from poor installation; if water makes its way through your windows during a summer thunderstorm or spring snowmelt, it’s a surefire sign of sloppy work. In Winnipeg’s freeze-thaw climate, that water intrusion is especially dangerous—moisture that seeps in during autumn can freeze, expand, and cause structural damage by winter.

3. Difficulty Opening Or Closing Windows

Your windows should glide open and close almost effortlessly; if they’re getting stuck, it could be for a few different reasons, including:

A warped window frame
Improper sizing
Poor levelling

These problems can also cause your window to be wobbly – and a wobbly window is likely to have gaps in it. No matter what the exact cause is, if your window is hard to open or close, it may have been improperly installed.

4. Messy Caulking & Poor Seals

You can spot a contractor who didn’t understand Winnipeg’s climate by checking the caulking. Improperly applied caulking looks uneven—thinner in some parts, thicker in others, or jagged and misaligned. You might also spot gaps or cracks that will only widen as temperatures fluctuate between summer heat and winter cold.

Poor caulking leads to seal failure, poor insulation, moisture damage, and drafts—all expensive problems when Manitoba Hydro rates spike during cold snaps. Sloppy caulking also signals a poor work ethic, which likely means the rest of your window wasn’t installed with the precision needed to survive Winnipeg’s extreme temperature swings.

5. Misalignment & Uneven Windows

Aesthetics matter, especially in Winnipeg’s heritage neighborhoods where home values depend on curb appeal. Look at your windows—are they all aligned? Check both inside and outside using measuring tape and levels.

Misalignment is common in Winnipeg homes where DIY installations or cut-rate contractors didn’t account for the settling that occurs in our clay-heavy soil, particularly in areas like St. Vital or Fort Garry where ground movement is pronounced. When windows aren’t even, it’s usually a sign of improper sizing or rushed installation—both requiring professional correction before the next heating season.

How To Fix The Improperly Installed Windows

Seal Gaps & Prevent Drafts

The tools and techniques you’ll use to seal gaps in your window will depend on the size of the gap and where the gap is located:

Rope caulk is great as a temporary seal for gaps in your window.

Foam backer is a good choice for larger gaps, but it must be paired with caulking.

Removable caulk is a good choice for awkward gaps.

Draft snakes are good for gaps near the windowsill.

Shrink film is the right pick if you want an extra layer of insulation on your window.

Weatherstripping can help improve insulation when applied along the edges of your window sashes.

Depending on the scenario, you may use several of these tools to seal the gaps in your windows. Remember: these are temporary. The only permanent solution for Winnipeg’s climate is proper installation by professionals who understand Prairie weather.

Repair Water Damage & Leaks

First, determine the leak source—water near your window may actually be coming from wall openings or upper-floor leaks, common in Winnipeg’s older homes with complex rooflines. Removing the window sometimes reveals rot, mould, or structural issues hidden behind the frame.

When leaks come from where the sash meets the jamb, try replacing weatherstripping, unclogging drainage channels, and applying fresh caulk rated for Winnipeg’s temperature extremes. If these don’t work, the installation itself is likely flawed—a new professional installation is necessary to prevent further damage during spring runoff or autumn rains.

Fix Operational Issues & Hardware

Sometimes, the reason your window is hard to open or close has nothing to do with installation; it might be the operational hardware that’s having issues. We can’t talk you through repairing or replacing all of the handles, knobs, and tracks on your window; there are simply too many kinds to cover in this article (but let us know if you want a more comprehensive breakdown).

We can, however, say that it’s worth looking for loose or missing screws, corrosion or rust (though we hope you don’t see those on a new window), or loose or broken knobs or handles. Replacement can help; so can lubricant on tracks. It all depends on your window!

Fix Foggy Windows

When there’s fog and condensation between your window panes, you can try to fix the problem by replacing your window sashes. This method will help reduce fog, but it won’t replace the inert gas that leaked out between your window panes; this gas acts as an excellent insulator.

In our experience, it’s usually best to find replacement windows when you have fog between your window panes. Foggy windows are poorly installed windows, and the effort of getting replacement sashes when you’ve already lost energy efficiency (remember, you’ve lost inert gases) is usually not worth it.

Correct Window Alignment & Levelling

Here’s another poor window installation problem that isn’t a DIY fix: When your windows are not properly aligned, you should call professional window installers to fix the problem.

Why Proper Window Installation Is Essential

Windows are more than just aesthetically pleasing; they provide insulation and weatherproofing for your home. When your windows are installed correctly, you won’t have to worry about water damage, and you’ll spend less money on heating and cooling. Proper installation is an absolute must.

Our Expert Window Installation Services

At Nisby Home Renovations, we offer comprehensive window installation services designed specifically for Winnipeg’s extreme weather. We install and replace all window types—casement, bay, awning, egress, and more—with materials and techniques tested against everything from summer humidity to January’s -40°C wind chill.

Our installers understand Winnipeg’s unique challenges: the settling patterns of River Heights clay soil, the non-standard openings of Exchange District heritage buildings, and the energy efficiency demands of Sage Creek new builds. Most importantly, we install windows right the first time—so you’ll never need to read an article like this again, no matter how extreme the Prairie weather gets.

Top Signs Of Bad Window Installation