How Much is it Going to Cost to Fix My Leaking Window?

Leaking windows don’t just happen out of nowhere. There’s usually an underlying issue that allows water to sneak into your home. Identifying the cause is the first step to fixing the problem and preventing further damage. Here are some of the most common culprits behind leaking windows:

Window seals play a critical role in keeping water out and maintaining your home’s energy efficiency. Over time, exposure to the elements—like sun, wind, and rain—can cause seals to crack, shrink, or peel away from the frame. Missing or degraded caulking around the edges of the window frame is a common culprit. Once these seals are compromised, even a light rainstorm can cause water to seep into your home, leading to visible leaks or hidden damage like mold or rot. Regular maintenance, like checking and reapplying caulking, can help prevent these issues before they start.

A poorly installed window is a ticking time bomb for leaks and potential mold and dry rot. Proper installation requires precision and attention to detail, including the use of flashing and sealants to protect against water intrusion. Without these safeguards, gaps can form between the window frame and the surrounding wall. These gaps act as direct pathways for water, especially during wind-driven rain. Sometimes, the installation itself is fine, but improper leveling or alignment can still lead to leaks over time. Professional installation ensures that your window not only looks good but functions as a protective barrier against the elements.

Nature can be tough on your windows. Intense storms, heavy winds, and flying debris can all take their toll. Especially with big weather events like atmospheric rivers and bomb cyclones. Even a small crack in the glass or damage to the frame from a falling branch can compromise the window’s ability to keep water out. In the Pacific Northwest, where rain is frequent, weather-related wear and tear is especially common. Over time, even high-quality windows can develop leaks if they’re exposed to repeated stress from the elements. Regular inspections after severe weather can help identify damage early, preventing larger repair bills down the line.

Window leaks aren’t always the result of a problem with the window itself. Sometimes, the real issue lies in the surrounding structure. Dry rot, caused by prolonged exposure to moisture, can weaken the wood framing or siding near your window. This decay compromises the window’s ability to form a tight seal, allowing even more water to enter your home. Other structural issues, like settling or shifting of the home, can also create gaps that lead to leaks. Addressing dry rot or structural concerns often requires professional expertise to ensure that the repairs are both effective and long-lasting.

By identifying the root cause of your leaking window, you can take the right steps to fix it. In many cases, catching the issue early can save you from more extensive repairs. Let’s look at what factors influence the cost of fixing a leaking window.