How to Fix a Window Leak at Home

Is your window leaking? It’s a common issue that homeowners face, but don’t panic! In this guide, Centra Install Pros will walk you through how to properly diagnose a window leak at home and determine with you can fix it yourself effectively, helping you keep your home dry and safe.

Step-by-Step Guide: How to Fix a Window Leak

Is it Really a Leak?

Before we jump to conclusions, it’s important to confirm that your window is actually leaking. Sometimes, the water you see may simply be condensation, which is quite normal and not necessarily a cause for concern. To determine whether it’s condensation or a true leak, consider these steps:

• Check for condensation: Condensation occurs when warm, moist air meets a cooler surface, typically the window. If the water is only on the inside of the window, it might just be condensation.
• Test with a hose: If you’re unsure, use a hose to simulate rain when the weather is dry. Spray water around the window frame and observe where the water enters. This method can help you pinpoint the source of the leak.

Pro Tip: Ensure that the water isn’t seeping into the wall below the window. If it is, this could cause significant damage and should be addressed immediately.

Identifying the Cause of the Leak

Once you've confirmed that water is indeed leaking, it's time to figure out the cause. The most common reasons for window leaks are:

• Damaged seals: Over time, window seals can degrade due to weather exposure. This is particularly common with older windows. If your windows are older, degraded seals are a likely cause.
• Poor installation: If your window wasn’t installed properly, it may not fit correctly, causing gaps that allow water to seep in. If it’s a newer window, poor installation could be the culprit.
• Design flaws: In some cases, design issues like gaps in flashing or ill-fitting windows may be the source of the leak.

Easy Fixes for Window Leaks

If you’ve discovered that the leak is due to damaged seals or weatherstripping, there are a few DIY fixes that can save you money:

• Replace the damaged sealant: Once the rain stops and it’s dry outside, remove the old, worn-out sealant. Clean the area thoroughly, then apply a new layer of high-quality sealant evenly around the window frame. Allow the sealant to set before using the window again.
• Replace gaskets and weather stripping: If the gaskets or weather stripping are worn out, replacing them will help make the window air and watertight.
• Repair or replace locks: If the lock is the issue, it may require more effort. While some homeowners can replace window locks themselves, it’s a more complicated fix than replacing seals.

To avoid larger issues, inspect your windows regularly for wear and tear. Early detection of leaks makes repairs easier and more affordable.

Keep Drainage Paths Clean

One of the easiest ways to prevent leaks in your windows is to keep the drainage paths clear. These areas can accumulate debris over time, which can block the water’s natural flow. Simply flush out the drainage paths with a bottle of water to ensure they stay clear during the next rainfall.

When to Call a Professional

If you discover that the leak is caused by an installation flaw or a design issue, it’s best to contact your window installer or a professional to assess the problem. Attempting to fix an installation issue yourself could cause more harm than good.

• Installation issues: If the window was poorly installed, contact the original installer for assistance.
• Design flaws: If you suspect the leak is due to a design flaw, it may require a professional to fix or replace the window. If your windows are under warranty, be sure to contact the manufacturer for repairs or replacements.

Worried About Leaks? Choose Centra Install Pros!

We have 40 years of experience, and we manufacture and install our own windows! We specialize in high-performance vinyl and hybrid windows that are designed to withstand all types of weather, including heavy rain. Our windows and doors undergo rigorous testing to ensure they’re ready to perform in even the harshest conditions. What’s more, we provide an unrivalled 30-year warranty that covers the frame, the glass, and the installation to give you the peace of mind you deserve!

FAQ: Fixing Leaky Windows

How can I tell if my window is leaking or if it’s just condensation?

If the water appears on the inside of the window, check for condensation first. To be sure, use a hose to simulate rain and observe where the water enters. This can help you determine if it’s a leak.

How do I fix a leaking window seal?

To fix a leaking window seal, remove the old, damaged sealant, clean the area thoroughly, and apply a new layer of high-quality sealant. Let it dry before using the window again.

When should I call a professional for a window leak?

If the cause of the leak is due to poor installation or design flaws, it’s best to consult a professional to avoid further damage.

Centra: Western Canada’s Top Choice for Windows & Doors

Have an upcoming window and door project? Reach out to the experts for a free consultation! If you have any questions regarding this topic or anything else to do with windows, contact a local Centra Employee Owner at 1-888-534-3333 or drop us an email at info@centra.ca. Follow us on Facebook and Instagram to stay up to date, and test your window knowledge on LinkedIn.