How to Fix A Leaky Basement Wall From The Outside

Exterior Membrane Waterproofing is the most popular method used by basement waterproofing companies to stop a basement leak, particularly when the leak is just in one area of a finished basement. Usually, this kind of leak is one that we can repair without needing to tear your beautiful basement apart.

The problem is often just a small crack in your foundation that shrinkage caused, and we usually can repair the leak in the basement by immediately excavating around the area that is affected, about 5 to 6 feet all the way down to its footing. Diagnosing leaking or wet basement problems properly can help with minimizing other expensive basement repairs. Read our basement leaks in heavy rain article.

Basement waterproofing company

How Leaking Basements Are Repaired By Basement Workers

This process begins with getting the exterior leaking wall of the basement cleaned and dried. The crack is sealed with polyurethane and then a drainage membrane is installed and sealed (an air gap is created by the drainage membrane between the wall and wet earth to prevent Hydro Static pressure and to keep the wall dry).  It results in water running down to its weeping tiles and then drained away. We only test the weeping tile and replace it if it is necessary.

Waterproofing systems all rely on there being adequate drainage at the foundation’s base. Without this, Hydro Static Floor Pressure can cause water to go up through the perimeter and the floor and wall cracks.

Common Causes Of Basement Leaks

Weeping tiles, in our experience, cause less than 2% of all of the waterproofing projects that we do. Water basically will follow a path of least resistance. When water seeps in between the earth and your foundation it begins to back up due to the dense soil. When the water backs up Hydro Static pressure is created against the foundation. This usually isn’t a problem unless the wall has a crack in it, and then water gets forced through the crack.

Whenever water reaches a functioning tile system’s gravel bed it loses all of its pressure and then gets channeled to the tile channel. When a drainage membrane is extended from the ground level over to the weeping tile system it eliminates the chance of Hydro Static pressure building up on the membrane’s interior at the wall, and prevent a leaky basement.

Other Things To Consider

There are some customers who think they need additional protection like a Blue Skin Membrane that is glued onto the wall before the drainage membrane. Check with your local waterproofing provider to see what their guarantee is. In areas where it isn’t necessary to excavate down to the footing like voids, holes, top rod, and inlets near the grade, we utilize a combination of Styrofoam, Aqua Block, Blue Skin, and Hydraulic Cement.

We do not use a drainage membrane because we do not have to excavate to the weeping tile. So make sure you get in contact with a waterproofing company to see they can help repair your leaking basement.

Basement Leaks In Heavy Rain

Spring rain might be a wonderful thing for your garden and its flowers, but it’s not a good thing if any of that water happens to leak into your basement. If your basement floor has puddles every time that it rains, then you might feel alone, but you’re far from it. A lot of homes have issues with basement water. The first thing to addressing basement water problems for once and for all is to first understand why you have water leaks in your basement in the first place.

Rain In Basement

Basement Leak Causes

The most frequent causes behind basement leaks are the pressure that water creates in soil that surrounds the foundation of the home. Two different kinds of pressure can create issues:

During bouts of persistent or heavy rain, the soil might get saturated, which creates hydrostatic pressure (water pressure) which can push water and moisture through the floor and walls of your basement.

Looser soil that surrounds a foundation often absorbs more water. The area surrounding a home typically gets flooded from water thanks to clogged gutters or even downspouts discharging water out right beside the foundation. When soil expands, it will put sideways or lateral pressure up against the foundation. This will cause damage to the foundation of your home, which creates leaks down in the basement.

Window wells might be another cause of potential water leaks in your basement. When a window well isn’t installed properly, or if a drain gets clogged, then the window well might fill up with water. During a period of heavy rain, water might seep right into your basement. Water stains on your walls are a definitive sign of having leaky basement windows. If you are looking for a professional service then check out

Fixing Up Basement Leaks

In terms of fixing a leaky basement, you can take several steps that might prevent leaks so your basement stays dry:

  • Clean The Gutters:

    • When it’s raining outside, clogged gutters will overflow, meaning that rainwater might pool up around your foundation. Removing debris and leaves is a good first step, especially when followed up with the installation of leaf guards. Also, install downspout extenders which will direct water away from your home. All of this will help prevent any soil around your home from getting saturated.
  • Improve The Grading:

    • It’s crucial to be sure that the soil surrounding your home is pitched away from your home so that water will drain towards your yard instead of your foundation.
  • Repair Window Wells:

    • One easy solution is the installation of a fitted window well cover that keeps your window wells free from leaves or other debris which might cause your drain to clog, allowing water the chance to seep down into your basement.
  • Install Some Kind Of Interior Waterproofing System:

    • If you want the most effective way of keeping water from your basement, then install some kind of interior drainage system that will keep the hydrostatic pressure to a minimum. If you install drain tile at the joint where the walls and floor meet, which is where most of your water leakage likely occurs, then you can capture the water before it gets to the basement floor. Water that comes through any foundation walls could also be collected up by the drain tile. This drainage system will then carry the water towards a sump pump which automatically pumps that water out of your home.