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Do Windows with Broken Seals Need to Be Replaced? Let’s Explore!

If you’re dealing with a broken window seal, you’re likely wondering whether it needs to be replaced or if a repair will suffice. A broken seal can lead to foggy windows, higher energy bills, and even water damage if left unaddressed. While some may attempt a temporary fix, it’s often not a long-term solution. At Glass Solutions, we’ve been helping Raleigh, NC, homeowners with window seal repair since 2009, and we’re here to guide you through the process. In this guide, we’ll explore whether windows with broken seals need to be replaced, how to tell if a window seal is broken, and the best steps to fix it—whether you’re considering a DIY approach or hiring a professional.

Our glass professionals at Glass Solutions have developed this comprehensive guide to help you understand the signs of window seal failure, the reasons behind it, and your options for repair or replacement. So, do windows with broken seals need to be replaced? Join us as we explore how to tell if a window seal is broken, when and how it can be replaced, and learn how to fix a broken window seal!

How to fix a broken window seal

Do Windows with Broken Seals Need to Be Replaced?

A window repair specialist repairs a broken window seal. This image is for the blog titled "Do Windows with Broken Seals Need to be Replaced?"

One of the most common questions we hear at Glass Solutions is whether windows with broken seals need to be replaced. The answer depends on the extent of the damage and the condition of the window itself. In many cases, a window with a broken seal can be repaired, especially if the frame and glass are still in good condition. However, there are situations where replacement is the better option to ensure long-term energy efficiency and prevent further issues like water damage or mold growth.

When Repairing a Broken Window Seal Is Possible

If the window frame is intact and the glass isn’t cracked, a broken seal on a window can often be repaired. For double-pane windows, a professional can replace the insulated glass unit (IGU) without replacing the entire window, which is a cost-effective solution. This approach is ideal if you’re wondering, “Can a window with a broken seal be repaired?” and want to avoid the higher cost of full window replacement.

When Replacement Is the Best Option

Replacement may be necessary if the window frame is damaged, the glass is cracked, or the window is over 15–20 years old. Older windows, especially single-pane ones, may not be as energy-efficient as modern double-pane windows, leading to higher energy bills. If you’re noticing significant drafts or moisture damage, replacing the window can save you money in the long run and improve your home’s insulation.

How to Tell If a Window Seal Is Broken

Window seals are prone to breaking in extreme temperatures and after many years post-installation. Knowing how to tell if a window seal is broken is the first step to addressing the issue. If you’re asking, “How do you know if your window seal is broken?” or “What does a broken window seal look like?” here are the key signs of window seal failure to look for during regular inspections.

Your Window Panes Are Fogged Up or Cloudy

Foggy windows are the most common sign of failed window seals, especially in double-pane windows. If you have a double-pane window seal broken, moisture can seep between the panes, causing condensation that makes the glass appear cloudy. This is a clear indicator that the seal has failed, allowing air and moisture to penetrate the space that should be filled with insulating gas like argon or krypton.

You Feel Drafts of Air Coming from Your Window

If you notice drafts of fresh air coming into your home from your windows, you may have a bad window seal. To check, hold a lit candle near the window edges on a windy day—if the flame flickers, air is leaking through. This not only affects your comfort but also leads to energy loss, as noted by the U.S. Department of Energy, which states that drafty windows can account for up to 30% of energy loss in homes.

You See Lights Coming in Through the Edges of the Window Frame

Another way to know if window seal is broken is to check the edges around your window frame. If you see light coming through, it’s a red flag that the seal has failed, allowing gaps to form. This can also contribute to drafts and energy inefficiency, making it essential to address the issue promptly.

Your Energy Bills Are Increasing

A sudden spike in your energy bills can be a sign of a broken window seal, especially if you haven’t changed your heating or cooling habits. When a seal fails, the window loses its insulating properties, forcing your HVAC system to work harder to maintain a comfortable temperature. This is particularly noticeable with double-pane windows, where the loss of insulating gas reduces efficiency.

Can Window Seals Be Repaired, and How?

Many homeowners ask, “Can window seals be repaired?” or “Can you fix a window with a broken seal?” The good news is that, in many cases, yes, a broken window seal can be repaired—especially if the damage is caught early. However, the repair method depends on the type of window and the extent of the damage. Here’s how to fix a broken seal on a window, including options for double-pane windows.

Can you fix windows with broken window seals? A window repair specialist replaces a window seal.

Defogging as a Temporary Fix

For a temporary solution, defogging can address the appearance of a broken seal on a double-pane window. A professional drills a small hole in the glass, removes the condensation, and applies an anti-fog solution before sealing the hole. While this can clear up foggy windows, it doesn’t restore the insulating gas, so the window’s energy efficiency remains compromised, and the fogging may return.

Replacing the Insulated Glass Unit (IGU)

A more effective repair for double-pane windows is replacing the IGU. This involves removing the damaged glass unit and installing a new one with a proper seal and insulating gas. This method, often called a window seal replacement, restores the window’s energy efficiency without requiring a full window replacement, making it a popular choice for homeowners asking, “Can double pane windows be resealed?”

Full Window Replacement

If the window frame is damaged or the window is old, a full window replacement may be necessary. Modern double- or triple-pane windows with Low-E coatings can significantly improve energy efficiency, potentially saving you $100–$500 annually on energy bills. This option is often recommended for windows with broken seals that are also single-pane or over 20 years old.

How Much Does Broken Window Seal Repair Cost?

Understanding the broken window seal repair cost is a key concern for many homeowners. The cost can vary based on the repair method, the type of window, and labor rates in your area. Here’s a breakdown to help you budget for fixing a broken seal on a window in Raleigh, NC.

Repair TypeEstimated Cost
Defogging (Temporary Fix)$60–$100
IGU Replacement$100–$600 (plus labor)
Full Window Replacement$300–$1,000 per window

These costs can vary depending on the size of the window, the extent of the damage, and whether you’re dealing with a double-pane window seal broken. For an accurate estimate, contact Glass Solutions for a free quote tailored to your specific needs.

Why Window Seal Break

Let’s explore reasons why window seals break so you be aware of factors that contribute to a failed window seal.

Temperature Changes

Temperatures can cause the seal to break over time. Warm weather will cause a seal to expand, and cold weather will cause it to contract. Over time, these changes can cause a seal to weaken and break, leading to a window seal failure.

Accidental Damage

Something hitting or damaging the window could lead a seal to break on the window. It does not take much force to break the seal on a window, so if you have pets or children, you may want to check your window regularly for signs of a damaged window seal.

Improper Installation

If the window wasn’t installed correctly, the seal may not have been properly sealed in the first place. This can lead to windows not sealed properly, causing premature failure. Make sure to check with a professional if you are unsure about how well your window was installed.

Age

Over time, the rubber used to keep moisture out of double-paned windows can degrade, causing the window seal to fail and let in moisture. If you’re wondering, “How long do window seals last?” the average lifespan is typically 15–20 years, though this can vary based on environmental factors and window quality.

Sunlight Exposure

Windows that receive a lot of sunshine are at a greater risk of seal failure. As the hot sun shines on a window, the glass expands and puts pressure on the seal. At night, the glass cools again and contracts. This process, known as “solar pumping,” repeats and can lead a window seal to fail over time.

Window seals break for a number of reasons. Window seals can also break due to high winds that can put pressure on the glass panes as well as the settling of the house that can create pressure on the panes. The use of chemicals can also dissolve the sealant material, contributing to a broken seal on a window. The factors are numerous.

What Happens When You Don’t Fix a Broken Window Seal?

A window repair specialist repairs a broken window seal. This image is for the blog titled "Do Windows with Broken Seals Need to be Replaced?"

If your window seals remain broken for too long, you may notice an increase in your energy bill as your window is not acting as an insulator from the outside temperature anymore. In extreme cases, water damage can impact the surrounding area if moisture is allowed to seep in. This can lead to mold or mildew to grow. The longer you wait to fix broken seals, the more problems may arise, and the likelihood you can repair them decreases.

Broken Window Seals and Energy Loss

A broken window seal leads to poor insulation for your home. This is specifically bad in the winter, when you may find yourself turning up the heat more often as heat escapes through the broken seals. Similarly, in the summer, your air conditioner will have to work harder to keep your home cool as the heat comes in through the window. This will lead to higher energy bills as your HVAC system works harder to maintain a comfortable temperature in your home.

Water Damage and Mold Growth

Another problem that can occur is water damage. If moisture is allowed to enter your home through window seals, it can lead to mold and mildew growth. This can cause serious health problems for you and your family, as well as damage to your home. Addressing a broken seal window promptly can prevent these issues from escalating.

FAQ About a Broken Seal on a Window

How Can I Prevent Broken Seals on a Window?

Avoiding high-pressure washing to clean the outside of the windows is one way to prevent broken window seals. The water pressure can get into the sash and damage the seal. Also, avoid using a heat gun to strip off old paint or varnish. The heat could damage the seal, causing it to fail. You also want to avoid using a chemical stripper to prevent the seal from breaking unnecessarily. Regular maintenance, like re-caulking annually, can also help extend the life of your window seals.

Double-pane windows typically last 15–20 years, but their lifespan depends on factors like installation quality, climate, and maintenance. The seals on double-pane windows can fail sooner if exposed to extreme temperature changes or direct sunlight, so regular inspections are key to catching issues early.

Yes, broken window seals can cause mold if moisture seeps into your home or between the panes of a double-pane window. This trapped moisture creates a breeding ground for mold and mildew, which can pose health risks and damage your window frame over time.

A broken seal on a window means your home is losing energy efficiency. For double-pane windows, the insulating gas between the panes escapes, reducing the window’s ability to keep heat in during winter or out during summer. This can lead to higher energy bills and an uncomfortable indoor environment.

In short, yes. A broken window seal will only worsen over time, leading to exacerbated energy loss, mold and mildew, foggy windows, and drafts. 

Are You Looking for a Professional to Fix Your Broken Window Seal?

If you want an assessment on your window seals to determine whether or not the seal needs to be replaced, contact us for a free estimate! We can advise you on whether you need a window seal repair or replace and provide a cost estimate. Our experienced team of glass experts is ready to help you with window seal repair near me in Raleigh, Cary, Garner, Durham, Wake Forest, and surrounding areas.

To get a free estimate or to schedule service, reach out to us today at  919-772-1007 or fill out the form below. Don’t let a broken window seal compromise your home’s comfort and efficiency—let Glass Solutions help you find the best solution!