Basement Window Leak Repair

Even sealed concrete walls, crack repair, and a functioning perimeter drainage system can’t protect against all possible water leakage – basement windows are often a culprit of wet basements that have been otherwise waterproofed.

Fortunately, leaking basement windows can be quickly and easily fixed. At Mission Home Services, we’re here to help.

Ready to stop basement window leaks in your Maryland home? Get in touch with us to get a free quote today.

Why are my windows leaking?

The most common reason that basement windows leak is due to degrading window frames.

Often, basement windows are constructed using inexpensive frames of steel or wood. Over time, these materials begin to break down and show signs of corrosion, rust, and decay.

As a result, the window panes within the frame being to hang more loosely in position, and the frame itself becomes looser within the opening in the basement wall. Consequently, water is able to get in – especially during periods of heavy rain.

A second, less-obvious cost of degraded windows is draftiness and rising energy need.

The good news is that our solutions can help.

How We Install the WellDuct® System

At Mission Home Services, one common solution we use to fix leaking basement windows is the WellDuct® Basement Window System. This system redirects flooding to a perimeter drain or drywell in order to keep the basement dry.

The installation steps are:

  1. Install a perimeter drain or drywell: It’s often best to have the water from your WellDuct® directed into a French drain system. If that isn’t an option, a small drywell can be created beneath the leaking window. If the issue is a leaking crack beneath your window, then there won’t be the need to create a hole.
  2. Create a drainage channel: Next, the installer will create a small hole in the wall underneath the window. Most commonly, a PVC pipe will be installed in this hole and a grated opening will be installed on the outside of the pipe to help prevent clogging. A polymer will be injected around the outer edge of the pipe to help keep it sealed and in place.
  3. Direct water into your perimeter drainage system: Then, a gray plastic fitting will be placed on your inside basement wall to channel water down into your perimeter drain or drywell. The top of the drain will be sealed off with a polymer injection, and there plastic pegs will be used to mechanically attach the plastic fitting to your walls.
  4. Seal the drain: The final step is to seal the edges of the plastic fitting to your wall with a polymer injection, then to clean and refresh the workspace.

Window Well Problems

The window frames may only be part of the problem, though. Debris-filled, metal window wells can make matters worse.

Often, these window wells leak during wet seasons as they fill with rain and snow. The end result is water getting into your home.

The solution? Get clean things out, replace as needed, and get window well covers.

DIY Window Leak Prevention Solutions

There are a few tactics you can try yourself to reduce the likelihood of leaking windows. These include

  • Routinely cleaning out dirt, leaves, and other debris from your window wells.
  • Keeping your gutters clear so that water runoff doesn’t pool around your windows.
  • Make sure the soil around your home is graded to slope away from your windows and foundation.

It’s also worth noting that keeping a window well free of dirt, leaves, and similar debris is a good way to help prevent pest infestations. Ants, termites, and more will often build their nests in debris near a home and expand from there into your home.

Get Basement Window Maintenance from a Trusted Team

Keep your basement safe and dry. Get in touch with us for a free quote, and take the first step toward preventing basement window leaks.


We get it. Basement waterproofing and foundation repair services can be challenging to consider when you’re on a budget. But everyone deserves a home that’s safe. That’s why we offer smart financing options to help make payments easier. View our options and consult with an expert to chart the path that will work best for you and your family.


Our Reviews

You don’t have to take our word for it. Our customers agree and we’re happy about that.

“From the very beginning of the transaction, Dave, the owner was honest, upfront and professional in his interactions with me. I am more than pleased with the work but more importantly, his values instilled in me a sense of confidence in small business owners who still believe in doing what is right for customers and providing outstanding customer service. I HIGHLY recommend Mission Home Services!”

Robert J. | ★★★★★

“Dave was super responsive and went above and beyond in getting my basement project completed. He kept in regular contact with me on updates to the project, expected delivery of materials, and on permitting status. Very reliable and did a terrific job on my basement retaining wall.”

Gail B. | ★★★★★

“First of all, I don’t usually do reviews; however, I was so impressed with the guys at Mission Home Services that I felt the need to let others know. We had them out to inspect our basement and give us an estimate on waterproofing it for future renovations. The representatives gave us a great education on not only how a basement leaks, but also how ours was leaking and the correct method to fix it. We highly recommend this company!”

Karly H. | ★★★★★
service area map

We serve communities in the following Maryland counties: