Leaking Windows When It Rains: What To Look Out For

When you hear that there’s rain in the projection, do you excitedly prepare for a peaceful day indoors as a gentle shower traces a course down the beyond your windows? Or, do you start to round up the buckets and towels to mop up the water that will inevitably leak inside?

No matter the season, leaking windows and patio area doors can pose significant issues consisting of structural and aesthetic damage in addition to increased heating & cooling expenses. It’s essential to resolve water leakages when you initially notice a problem. By making the effort to examine the situation now, you’ll lower the danger of pricey repairs later on.

Why are my windows leaking?

Window leaks prevail in ageing houses. After years of severe temperature levels, differing weather and building settling, windows are no longer air- or water-tight. Window frames can end up being damaged, glazing seals broken or the whole unit can become out of square (leaving spaces where water can leak in.).

While older windows typically experience water leaks, newer ones can likewise be at danger. Normally, there are three key areas that cause windows to leakage: home design, installation and maintenance.

House Design:.

  • Absence of overhangs to drain water off the roof and protect wind-driven rainwater from entering through the windows.
  • Improperly angled fascia board above the window. It must be angled outward to direct water far from the system.


  • Poorly installed windows or breaks in the flashing will allow water seepage.
  • Using building paper or home wrap instead of specially designed window flashing will enable water to leak behind the paper and into the wall location around the windows.


  • Broken or missing caulking at the window flange and at seams.
  • Cracked glazing putty– the glass seal will be broken and allow for wetness and condensation to get in between double-glazed windows.
  • No paint seal– paint must slightly overlap from the window moulding to the glass to produce a tight seal.

If you live in an older home than you must have asked yourself ‘How to make an old home more energy effective?’ Check out all susceptible areas of your home to see what you can do to enhance your older home efficiency and keep your budget plan safe. Often even smaller enhancements can make extreme modifications.

How can I determine where the leak is coming from?

  • To recognise why your windows are dripping, it is crucial to determine where they are leaking from. In a previous post, we supplied pictures of different leakages and what the cause might be.
  • Leaks on the wall around, above or below the window, often mean that there is an opening somewhere in the wall that is enabling water in and causing it to run along the studs of the window, pooling either below or above. But this exposed opening may not be straight around the window.
  • In older houses leakages are just as likely to take place around the roofing or upper floorings. It isn’t always easy to recognise the source of these leaks without getting rid of the whole window. While your walls might still look brand-new and fresh on the space side, there may be an apparent pattern of rot, or perhaps mould reaching all the way up the wall.

Leaking window cases.

  • Leakages on top or bottom of the window are often a result of leakage in the structure.
  • If the window leakage is visible in the location where the window sash satisfies the jamb, or on the window frame, possibilities are the issue remains in the window itself.
  • In older windows, this might be a result of wear and tear from running the window, sealed unit failure, or wear and tear throughout time. It may also be something as little as worn weather-stripping, clogged drainage channels requiring water back into your home, or a misaligned sash.

How can I repair window leaks?

In reality there as lots of fixes as there are causes for leakages in windows. It could be something as simple as replacing weatherstripping on a slider window, or as made complex as having to reconstruct half of your rotten wood wall prior to even beginning a window replacement.

You can try some easy maintenance work such as:.

  • Eliminate harmed outside caulking, clean the window frame and recaulk.
  • Inspect the gasket in between the window frame and the glass. Re-seal the glass to the gasket with clear silicone caulk.
  • Make sure the sill at the bottom of the window frame is pitched downward to drain water toward the outside.
  • Clean dirt, debris and pests from weep holes in the frame bottom. Use a small wire to unplug these holes. This will allow any water that is available in through the screen to drain to the outside.

If your window is leaking beyond the actual unit and is affecting or has impacted the structure around the window, the only proper solution is to employ an experienced window replacement professional for an assessment and possibly a full-frame window replacement.

It is often tough to tell if the there is moisture damage in the frame till the window is out. These walls look fine, but it’s a mess on the within.

While a full-frame replacement is a more expensive undertaking compared to other options, it is also the most thorough. Window experts who reinstall the window will have the ability to remove any broken or rotten wood from the frame and the wall structure surrounding it.

What is possibly more crucial in the long run, is that they will determine where the leakage is coming from, and be able to inform you whether it is directly associated to the windows, or is coming from another part of the wall.

How can I prevent future window leaks?

Although the majority of modern-day windows are hailed to be “maintenance complimentary” there is still some upkeep that needs to be done to ensure the very best efficiency from your windows.

Make certain to inspect the caulking around the beyond your window for a constant seal. Replacing the caulking can bring the condition of the seal back the initial guaranteeing a continuous closure for the window.

If you have an operable slider or hung windows be sure to check the cleanliness of your drain channels. As particles, leaves, and even dust falls under the channel it can often block the natural flow of water and cause pooling in the window.

Leaks can likewise happen when rainwater gets in through the roofing, chimney or loose-fitting siding. Typically, the water will follow an uncommon path along ceiling joists or wall studs up until it reaches a window frame where it can then drip within. Make certain to change any harmed or missing out on roof shingles, caulk gaps around fireplace chimneys and exhaust pipes, and safe and secure siding to stop water from permeating behind it.

Even with proper maintenance, you may eventually experience water leaks. It’s important to look for some professional assistance to identify the source and degree of the issue.

Whether you wind up looking for a window repair work or replacement company, who you decide to choose can have a direct effect on how well the problem gets fixed. Make sure to ask the project specialist, repairman, or installer why they think the window is dripping where it is, and their recommended service. While you might not want to do a complete replacement, this may be the very best solution to get rid of dripping windows.

Post Sponsored by Birmingham Glaziers 24/7 – Your Local Glazier.

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