If your current windows are showing signs of moisture damage, create uncomfortable drafts, or are stuck closed, it’s possible they weren’t installed correctly. Spot the signs of poor installation early, and you may be able to fix problems before they cause the need for major repairs. Better yet, when you need new windows, ensure you choose a reputable contractor with a track record of success (like us!) so your window installation is done with the precision required to give you lasting results.
How to Spot an Incorrect Window Installation
1. Are you hearing strange noises when you open and close your windows?
New windows should open and close with ease. They shouldn’t create any unusual noises as you use them. If you hear creaking or cracking noises when you open or close your windows, they were probably too tight or too loose when they were installed—or the window hardware may not have been installed correctly. Another culprit could be that the glass and window frames are low quality, and may become too tight or loose due to weather changes.
2. Are there obvious gaps between your window frame and windowsill?
Windows are made to protect your home from outdoor temperatures, rain, snow, and more. If you spot gaps between your window frame and windowsill, the installers didn’t measure properly for your custom windows, or they chose the wrong size windows. Gaps cause unwanted drafts to seep inside your home, making it uncomfortable in the winter and summer months when you use your heating and air conditioner most.
3. Is it tough to open or close your windows?
When windows are installed properly, they function with ease. Opening and closing them is a breeze! When windows aren’t installed properly, they tend to stick shut or open. If you need to use force to get your windows to open or close, they were likely poorly installed. Either the sash wasn’t aligned properly, or it’s the wrong size for your window. If you don’t fix the problem, you’ll eventually experience a leak.
4. Do your windows leak?
A poorly installed window will probably leak. It may appear unsuspecting at first, as slight dampness or a little mold under your window or along its frame. But as time goes on, your paint may start to peel, mold may spread, and your walls could start to rot. Leaks usually occur because your windows aren’t level or their flashing wasn’t placed properly. Moisture infiltration is nothing to mess with. If you spot this problem, have it remedied promptly to avoid bigger issues.
5. Is the caulking around your windows patchy?
Caulk helps seal your window so the elements stay outside where they belong. With proper window installation, there should be a clean line of caulk around your window. If the caulk around your windows is patchy, uneven, or sloppy, it’s a sign of poor craftsmanship. If the caulk you can see is sloppy, it’s possible the things you can’t see about the installation are too.
6. Did your windows come with a warranty?
When you have new windows installed, your contractor should offer you product and workmanship warranties. If they didn’t, that’s a red flag that you may have gotten a poor window installation.
Window manufacturers give strict guidelines to contractors to adhere to, so you get the optimal performance from their windows before giving you the benefits of a warranty. And contractors who stand behind their work are confident in their installation practices, giving you confidence your windows were fitted accurately.
The Problems Improperly Installed Windows Create
If your windows weren’t installed with precision, you may see the following problems pop up:
- Window leaks that create costly damage
- Uncomfortable temperatures inside your home
- Increase in utility bills
Get Premium Windows Installed to Perfection by Our Experienced Team
When your home needs new windows, you can avoid the problems mentioned above by simply hiring a trusted contractor who will do your upgrade with exactness. You’ll get years of satisfaction out of a job well done when you hire an experienced contractor to install your new windows.
As the exclusive distributor and authorized contractor for Infinity from Marvin Windows in the St. Louis area since 2006, at Replacement Windows by Lakeside, we ensure correct installation of these quality windows. Don’t take our word for it—read these testimonials from our recent customers.
Ready to upgrade your windows but not sure where to start?
Our expert guide walks you through everything you need to know! Discover the best options for energy efficiency, style, and long-term value. Check out the Ultimate Guide to Replacement Windows today!


