Basement walls can develop many different issues, and one of these issues is the appearance of a white powder on the walls. You may notice white stains randomly appearing on your basement walls. This substance is white and powdery, almost like chalk. In this blog, we will tell you what the white powder on your basement walls is, how it is formed, and what you can do to fix it.
The White Powder On Basement Walls: Efflorescence
The white powder on the basement walls is called efflorescence. Efflorescence occurs when water is present in your basement walls. When the water passes through your basement walls and evaporates, it leaves behind the salt deposits on the masonry. These salt deposits occur in the form of white, powdery stains. In addition to basement walls, efflorescence can occur on concrete surfaces, retaining walls, stone, and stucco. Unlike mold, efflorescence is not toxic or hazardous. However, it does indicate water intrusion in your basement.
Causes of Efflorescence
Efflorescence needs three ingredients to form: salt, water, and an entry point in your basement. Below are a few examples of how these components come into contact and develop to form efflorescence.
Moisture
Any kind of moisture in your basement walls can result in efflorescence. Bare concrete surfaces typically have salt in them due to the presence of sodium and potassium oxides in the cement. When the water comes in contact with the concrete, the salt mixes with the water. Eventually, the water evaporates, leaving behind the deposits of salt, forming efflorescence.
Rainwater
Rainwater is one of the leading causes of flooding in basements. If your basement lacks adequate waterproofing systems, such as French drains and a sump pump, rainwater will accumulate in your basement.
Groundwater
Groundwater is water that exists beneath the soil’s surface. When the groundwater rises, it may move into the building materials of your foundation. As a result, it dissolves salt within the materials and carries it to the surface. The water evaporates and leaves behind efflorescence.
Hydrostatic Pressure
Hydrostatic pressure refers to the pressure exerted by water on your basement walls and floor. When there is a high water table, it can force moisture through concrete. Once the moisture comes into contact with the masonry or concrete, it starts dissolving salt in the materials, forming efflorescence.
How to Get Rid of Efflorescence on Basement Walls?
There are various methods, including some home remedies, to remove efflorescence from your basement walls. You can remove the efflorescence with ease by using a strong brush. Make sure your basement is completely dry before using the brush to remove the salt deposits. If brushing doesn’t work, you can apply water pressure to dissolve efflorescence.
However, if you are using pressurized water, make sure you dry the basement walls right after to avoid facing the same problem again. Another home remedy is using diluted vinegar (vinegar mixed with water) to clean efflorescence. You can easily find vinegar in your kitchen or the nearest grocery store, and it’s less harmful than industrial chemicals.
How to Prevent Efflorescence on Basement Walls?
The only way to avoid efflorescence on basement walls is to make sure your basement doesn’t have moisture issues in the first place. To do that, you will need to take the following measures in your basement:
- Insulation: Seal all the cracks in the walls and get your basement insulated to prevent moisture and water damage.
- Drainage: Install water drainage systems, like French drains or drain tile, to ensure water safely exits your basement and doesn’t accumulate inside.
- Sump Pump: A sump pump is installed at the lowest point in your home and helps you remove water from your basement before it can cause damage.
- Sloping and Grading: You should also get the soil around your basement properly graded to prevent groundwater from entering your basement.
Schedule a Foundation Inspection Today!
Efflorescence is not a major structural issue, but it’s an indication that your basement has been compromised by water intrusion. Get your basement professionally inspected to ensure you identify the underlying problem and implement suitable repairs to safeguard your basement. Call the experts at Lamunyon Dry Out and Foundation Repair for a professional inspection today.
