What are the Signs of Poorly Installed Replacement Windows?

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Poorly installed replacement windows can sometimes be glaringly obvious, while at other times, they may not be so easily discernible. The key to a successful window replacement project lies in choosing a trusted professional with a proven track record. At Thermal King, we stand by our promise of “perfection engineered for your home.” We ensure that our windows, doors, and siding are of the highest quality, energy-efficient, and backed by a lifetime guarantee.

In this article, we’ll explore the importance of selecting a reputable installer and highlight the signs that indicate subpar window installation. Our aim is to help you make an informed decision when it comes to upgrading your home’s windows, doors, or siding.

The Reputable Installer

The first and foremost consideration when embarking on a window replacement project is the installer’s reputation. You want to work with a company like Thermal King, known for its commitment to excellence. At Thermal King, we only entrust our window installations to our experienced professionals, each with years of experience in the field. We don’t take chances with newcomers who may lack the necessary expertise.

Moisture Infiltration

One of the most critical aspects of window installation is keeping moisture out of your home. While the average homeowner may not be well-versed in spotting potential issues, moisture infiltration is a problem that should never be ignored. Moisture can lead to mold, rot, and long-term structural damage, affecting not only the aesthetics of your home but also its foundation.

When a window is correctly installed, everything overlaps seamlessly, creating a watertight barrier. At Thermal King, our installation process involves wrapping the exterior trim with metal siding, starting from the bottom up. This means that the window sill is covered first, followed by the brick mold and finally the cap top brick mold. This meticulous approach ensures that moisture has no way to penetrate, even if caulking or sealant eventually fails.

Window Doesn’t Function Properly

A well-installed replacement window should function flawlessly from the moment it’s put in place. If you encounter issues like difficulty in opening or closing, problems with locking, or gaps that prevent a tight seal, it’s a clear sign that something is amiss. These issues often indicate that the window isn’t plumb, square, or properly fitted.

While it’s natural for larger windows to be a bit stiff when they are first installed due to their tight factory seal, it should not be excessively difficult to operate them. If you find yourself struggling with your windows, it’s likely that they were not installed correctly or were improperly measured, causing them to be jammed into the opening.


Recognizing the signs of poorly installed replacement windows is crucial for the long-term health of your home. When moisture infiltration and functional issues are left unaddressed, they can lead to costly and extensive repairs down the road.

To avoid these problems, always choose a reputable installer with a history of excellence, such as Thermal King. Our commitment to delivering high-quality, energy-efficient, and lifetime-guaranteed windows, doors, and siding ensures that your home remains a safe and comfortable haven for years to come.

If you have any questions or concerns about your windows installation, don’t hesitate to contact us at Thermal King. We’re here to help you make the right choices for your home’s well-being.