5 Reasons Your Windows Are Leaking

Imagine it’s a rainy day in Toronto, and you’re curled up with a good book, enjoying the cosy ambiance of your home. Suddenly, you notice a damp spot on the wall near your window. A closer look reveals a trickle of water seeping in through the frame. Leaky windows are a common problem that can disrupt your comfort, damage your home, and even lead to higher energy bills.

Drafts from leaky windows can make your home feel chilly in the winter and stuffy in the summer, while water infiltration can cause rot, mould, and structural damage. Also, leaky windows compromise your home’s insulation, allowing precious heat to escape in the winter and cool air in the summer, driving up your energy costs.

Understanding the common causes of window leaks is the first step towards resolving the issue and restoring your home’s comfort and efficiency. This post will explore five of the most common culprits behind leaky windows and provide practical solutions to keep your home dry, warm, and energy-efficient.

Reason 1: Worn-out Weatherstripping

Weatherstripping is a protective barrier between your window sash and frame, creating a tight seal to prevent air and water infiltration. Over time, exposure to the elements and regular use can cause weatherstripping to deteriorate, compromising its effectiveness.

Signs of Wear

Look out for these telltale signs that your weatherstripping may need replacing:

Visible damage: Cracks, tears, or gaps in the weatherstripping material.
Drafts: Feeling cold air seeping in around the window, even when it’s closed.
Water infiltration: Noticeable water leaks or moisture buildup around the window frame during rain or snow.
Difficulty opening or closing the window: If the window feels sticky or difficult to operate, worn-out weatherstripping could be the culprit.

Solution

Replacing weatherstripping is a relatively simple and affordable DIY project that can significantly improve your window’s performance.

Remove the old weatherstripping: Gently detach the existing weatherstripping from the window sash or frame
Clean the surface: Clean the area where the new weatherstripping will be applied to ensure proper adhesion.
Measure and cut: Measure the window sash or frame length and cut the new weatherstripping to size.
Apply the new weatherstripping: Peel off the backing and carefully press the new weatherstripping into place, ensuring a snug fit.

By replacing worn-out weatherstripping, you can eliminate drafts, prevent water leaks, and improve your home’s energy efficiency.

Reason 2: Deteriorated Caulking

Caulking is a flexible sealant that fills gaps and cracks between your window frame and the surrounding wall. It is instrumental in preventing air and water leakage, ensuring a tight and weatherproof seal. However, caulking can deteriorate over time due to exposure to the elements, temperature fluctuations, and general wear and tear.

Signs of Deterioration

Keep an eye out for these signs that your caulking might be failing:

Cracks or gaps: Visible cracks, gaps, or holes in the caulking line, allowing air and water to penetrate.
Peeling or flaking: Caulking peeling away from the window frame or wall, indicating a loss of adhesion.
Discolouration or mould growth: Dark spots, discoloration, or mould growth on the caulking is often a sign of moisture infiltration.
Drafts or water leaks: If you notice drafts or water seeping around the window frame, especially during rain or strong winds, deteriorated caulking could be the cause.

Solution

Replacing old, damaged caulking is a DIY project that can significantly improve your window’s performance and prevent further damage to your home.

Remove the old caulking: Carefully remove the old caulking using a putty knife or caulk removal tool. Make sure to remove all debris and residue to create a clean surface.
Clean and prepare the area: Clean it thoroughly with soap and water, then allow it to dry completely.
Apply new caulk: Choose a high-quality one for exterior use and apply it evenly along the gap between the window frame and the wall. Use a caulking gun for smooth and consistent application.
Smooth and finish: Smooth the caulk with your finger or a caulk finishing tool to create a neat and even seal. Allow the caulk to cure completely according to the manufacturer’s instructions.

Properly applied caulking creates a durable barrier against air and water infiltration, improving your home’s energy efficiency and preventing moisture damage.

Reason 3: Damaged or Warped Window Frames

Window frames, particularly wood-made, are susceptible to damage and warping over time. Exposure to the elements, especially harsh Canadian winters and fluctuating temperatures, can cause the wood to expand and contract, leading to cracks, rot, or warping. Older windows may also deteriorate due to age and general wear and tear.

Signs of Damage

Inspect your window frames for these visual cues that indicate potential damage:

Cracks: Look for cracks or splits in the wood, especially around joints or corners.
Rot: Check for soft or spongy areas, discolouration, or peeling paint, which could indicate wood rot.
Warping: Observe if the frame is bowed or twisted, preventing the window from closing properly or creating gaps.
Difficulty opening or closing: If the window is difficult to operate, it could signify a warped or damaged frame.

Solution

Repairing or replacing damaged window frames is best left to professionals. Attempting DIY repairs can be challenging and may not address the underlying issue effectively. A qualified window installer can assess the extent of the damage and recommend the most appropriate course of action.

Repair: In some cases, minor damage can be repaired by filling cracks, sanding, and repainting the frame. However, a new window replacement may be necessary if the damage is extensive or involves rot.
Replacement: Replacing damaged window frames eliminates leaks and improves your home’s energy efficiency and aesthetic appeal.

Reason 4: Improper Installation

Even the highest-quality windows can leak if not installed correctly. Professional installation is crucial to ensure a proper seal and prevent water infiltration.

When windows are installed incorrectly, gaps can form between the frame and the wall, allowing air and moisture to seep through.

Signs of Improper Installation

Here are some red flags that might indicate your windows weren’t installed properly:

Visible gaps: Check for gaps or cracks around the window frame inside and outside your home.
Difficulty opening or closing: If the window is difficult to open or close or doesn’t latch securely, it could be a sign of misalignment or improper installation.
Drafts: Feeling drafts around the window, even when closed, suggests air leakage due to poor installation.
Water leaks: If you notice water stains or moisture buildup around the window frame after rain or snow, it’s likely due to improper sealing.

Solution

Addressing improper installation requires professional expertise. Attempting DIY fixes may not be effective and could even worsen the problem. Contact a qualified window installer to assess the situation and rectify the installation. They can properly seal gaps, adjust the window frame, and ensure a watertight fit.

Reason 5: Condensation Buildup

Condensation on your windows is common, especially during colder or humid conditions. It happens when warm, moist air inside your home comes into contact with the colder surface of your windows. As the air cools, it can no longer hold as much moisture, and the excess water vapour condenses on the glass, creating familiar droplets or even frost.

Causes of Excessive Condensation

While some condensation is normal, the excessive buildup can lead to several problems, including water damage, mould growth, and even health issues.

Several factors contribute to excessive condensation:

High indoor humidity: Cooking, showering, and breathing release moisture. In humid climates or poorly ventilated homes, this moisture can accumulate and lead to condensation on windows.
Poor ventilation: Inadequate ventilation prevents moist air from escaping, trapping it inside and increasing the likelihood of condensation.
Single-pane windows: Single-pane windows offer less insulation than double or triple-pane windows, making them more prone to condensation as the interior surface gets colder.

Solutions

Here are some tips to reduce condensation and keep your windows dry:

Increase ventilation: Open windows or use exhaust fans to improve air circulation and remove excess moisture.
Use dehumidifiers: Dehumidifiers can help to reduce indoor humidity levels, especially in damp basements or bathrooms.
Upgrade to energy-efficient windows: Double or triple-pane windows with low-E coatings offer better insulation and reduce condensation significantly.
Keep the heat low: Avoid overheating your home, which can create a greater temperature difference between indoor and outdoor air, leading to condensation.
Wipe down windows regularly: Wipe away condensation as soon as you notice it to prevent water damage and mold growth.

Enjoy a Comfortable & Energy-Efficient Home

By addressing the underlying causes of excessive condensation and taking preventative measures, you can keep your windows clear and your home healthy and comfortable.

Leaky windows can be a major source of frustration and discomfort, leading to drafts, water damage, and increased energy bills. As we’ve explored, the most common culprits behind window leaks include worn-out weatherstripping, deteriorated caulking, damaged or warped window frames, improper installation, and condensation buildup.

At GTA Direct Windows & Doors, we can diagnose the problem and provide tailored solutions, whether a simple repair or a complete window replacement. We offer free estimates and are committed to helping you achieve a comfortable, energy-efficient home with flawlessly performing windows.

Don’t let leaky windows compromise your comfort or drain your wallet. Contact us today and let us help you enjoy a leak-free home all year round!

Call (647) 966-4898

5 Reasons Your Windows Are Leaking