In homes with windows that have been in place for more than 30 years, leaky windows is not unusual. When you have windows leaking, whether it’s because of wear and tear or poor window installation, you will face issues such as:

  • Conditioned air leaks
  • Heat loss or unwanted heat infiltration
  • Condensation on the windowsill or floor
  • Mould growth or proliferation
  • Water damage.

It’s Not a Leak, It’s Condensation 

Not all kinds of condensation is bad. In fact, condensation happening on the exterior side of the window during the summer season is a sign that the window is insulating your home well.

However, the type of window condensation that is most commonly mistaken for windows leaking is condensation on the interior. Contrary to what it looks like, this is NOT a definitive sign that your window is leaking. This, instead, points to high humidity in your home.

This is common during the winter because condensation forms on glass when the glass is cooler than the moist warm air that touches it. As more condensation forms, this can drip and accumulate on your window sill or drip along the walls – thereby resembling a window leak.

Though the root cause of interior window condensation is not your windows leaking, high humidity may cause issues down the line. If your home’s humidity is too high, it can encourage the proliferation of mould, make wood swell and warp, and speed up corrosion of metallic components.

Intricate Window Layouts Without The Right Protection 

There are many different window styles, including unconventional ones such as specialty shaped windows, bay and bow windows, and tall windows. While these styles offer numerous aesthetic and functional benefits, they should be properly installed with the necessary sealants, flashings, or overhangs to prevent water penetration.

These windows are more exposed to the elements than standard windows and extra insulation and protection is necessary to keep wind-driven rainwater from pushing through.

Worn Out Glass Seal 

Condensation is a different story when it starts collecting in between panes of glass. This could happen to multi-glazed windows and it’s a clear sign that the seal is broken. Double-glazed and triple-glazed windows have what’s called a sealed glass unit. If the seal is broken for this kind of window glass, condensation can form inside. This means that air leaks are probable.

Furthermore, if in-between condensation is accompanied by small puddles of water forming at the base of the windowsill, it means that rainwater can work its way through the broken seal. The only way to fix this kind of problem is to have the sealed glass unit replaced or to get replacement windows.

A Broken Window Seal 

Through time, window seals can break. This is usually due to wear and tear. Broken window seals can be a result of the following:

  • Cracked caulking; and/or
  • Flattened or worn out weatherstripping.

Cracked caulking or failing weatherstripping can cause air leaks and heat loss. Furthermore, when such window seals are broken, they can allow rainwater to seep into the house. Fortunately, these issues can be fixed easily.

Poor Flash Installation 

In some cases, stains that form at the top of the window frame could actually not be window leaks but leaks in the wall due to poorly installed flashing. To prevent water from penetrating the walls, it is necessary to have solid integration between the window, building paper, and flashing.

Poorly installed or damaged flashing could result in breaks in its surface that allow water to seep through. This problem can be corrected by installing stretchable flashing as a single continuous piece rather than patches that create weak points.

It is important that you don’t substitute the window flashing material with building paper or house wrap. Using the right material ensures superior water protection and reduces the risk of damage caused by leaky windows.

Whatever you decide for your home Valley Isle Windows & Doors is here to help! Contact us today