6 Most Common Window Problems (Cracks, Fogging, Leaks) and How to Fix Each One

Windows take a beating over the years. Sun, wind, hail, temperature swings, and just plain time all add up. Most window problems are more fixable than people realize, and in many cases you don’t need to replace the whole window to solve them.

Here are the seven most common issues we see at Ace High Glass, and what the right fix actually looks like for each one.

 

1. A Cracked or Broken Pane

This is the most obvious one. Whether it was a stray rock, a hailstorm, or a kid with a baseball, a broken pane needs to be dealt with promptly. A crack that looks minor today will usually spread, especially once temperatures start fluctuating.

The good news is that broken window repair almost never requires replacing the entire window. In nearly all modern windows, the glass unit can be removed and replaced while the frame stays in place. At Ace High Glass, we measure the existing opening precisely, have a new insulated glass unit fabricated to those exact dimensions, and install it in a single visit. It’s less expensive and far less disruptive than people expect.

What you should avoid: DIY crack repair kits or resin injections. These might work on auto glass, but residential window panes are insulated glass units with two or three panes sealed together. Patching the surface does nothing for the insulating layer between the panes, and the crack will continue to spread.

 

2. Foggy or Cloudy Glass Between the Panes

If you’re seeing a hazy, milky, or foggy appearance between the panes of glass, that’s seal failure. The insulated glass unit (IG unit) is sealed at the factory to trap either air or an inert gas like argon between the panes. When that seal breaks down over time, moisture gets in and you end up with the fogging you’re seeing.

It’s one of the most common window problems in Colorado, where temperature swings put a lot of stress on seals year after year.

No cleaning product will fix it, because the moisture is trapped inside a sealed unit. The fix is replacing the IG unit, which is exactly what we do. The new unit comes with a 10-year warranty and your window will look clear again from day one.

 

3. Drafts Coming Through a Closed Window

Feeling a cold draft near a window that’s fully closed is a sign something has failed. It could be the weatherstripping around the sash, the seal on the glass unit itself, or a gap between the window frame and the wall.

Start by running your hand slowly around the edges of the window on a cold day. If the draft is coming from around the sash or frame, weatherstripping replacement is often a straightforward fix you can do yourself. If the cold is coming through the glass itself, or if you’re noticing fogging alongside the draft, the IG unit has likely failed and needs to be replaced.

Drafts aren’t just uncomfortable. They mean your heating and cooling system is working harder than it needs to, which shows up on your energy bills.

 

4. Higher Energy Bills Without an Obvious Cause

This one catches people off guard because the window looks fine from the outside. But a failed window seal doesn’t always produce visible fogging right away. In the early stages, the gas fill between the panes escapes and gets replaced by regular air, which has worse insulating value. You lose efficiency before you ever see cloudiness.

If your heating or cooling costs have crept up and you can’t explain why, it’s worth having your windows checked. Older double pane windows that are showing their age are a common culprit, and replacing the glass units (not the whole window) can make a noticeable difference in energy performance.

Upgrading to a high-performance glass unit with low-e coating and a quality gas fill is also an option worth considering if energy efficiency is a priority.

 

5. A Window That’s Hard to Open, Close, or Lock

Operational problems are usually a frame or hardware issue rather than a glass issue. Wood frames can swell with moisture. Vinyl frames can warp slightly over time. Hinges, balances, and locking mechanisms all wear out.

For stuck or stiff windows, check whether the frame looks swollen, warped, or painted shut. A wood frame that’s absorbed moisture may just need time to dry out, or the sash may need to be planed down slightly. Hardware replacements for locks and operators are generally inexpensive and something a handy homeowner can tackle.

If the frame itself is severely warped or rotted, that’s when you’re looking at a more significant repair or full window replacement.

 

6. Chips, Scratches, or Minor Surface Damage

Small chips at the edge of a pane are worth paying attention to even if they don’t look serious. Edge chips weaken the glass and can lead to cracking, particularly when temperatures change and the glass expands and contracts.

Surface scratches are mostly cosmetic. Fine scratches can sometimes be polished out with a glass polishing compound, though results vary depending on depth. Deeper scratches generally can’t be fully removed, and if they’re bothering you or affecting visibility, glass replacement is the more practical solution.

For chips at the edge or corner of a pane, we’d recommend having a professional take a look before it becomes a larger break.

 

When to Call a Professional

Most of the problems above have a clear path to a fix, but a few situations call for getting a professional involved sooner rather than later. Broken or severely cracked glass is a safety issue and shouldn’t sit. Fogged windows won’t resolve on their own. And if you’re seeing multiple failing windows at once, it may be worth a professional assessment to understand the scope of what you’re dealing with before tackling them one by one.

At Ace High Glass, we’ve been handling broken window repair, seal failure, and glass replacement for Colorado homeowners and businesses for over 40 years. We’ll take a look, give you an honest assessment, and tell you what actually needs to be done.

Give us a call at (303) 893-1595 or request a quote online.