Basement Finishing: Do Not Paint Your Walls
I know what you are thinking… what do you mean, do not paint your walls in your basement?!
I am not talking about finished walls like drywall. I am talking about do not paint your foundation walls like concrete, brick, and block.
Remember, most foundation walls allow moisture and humidity into your basement. Many paints are not strong enough to hold back the hydrostatic pressure. Even if they are able to stop the hydrostatic pressure, paint is mold food!

In the picture above the homeowner painted their basement wall. The paint did not reach the footer. Water still enters the basement at the cove.
The foundation repair specialists from Crawl Space Ninja had to do interior waterproofing system for this homeowner because the paint did not hold back the moisture intrusion due to hydrostatic pressure.
What is Hyrdrostatic Pressure
Hydrostatic pressure is the “force that pulls water into dry spaces. Think of dry ground as a sponge, and standing water around your foundation can seep its way under or through the brick foundation through this hydrostatic pressure. The dry space, along with the weight of the water, pulls the moisture into the “void” space in the bricks.
Over time, the water works through the brick to the other side and accumulates, creating the dank moisture you feel in a crawl space or basement.
Poorly Painted Basement Walls Do Not Hold Back Water
You may have seen that display in the home improvement store with a block covered in waterproof paint. A lot of homeowners get idea that waterproof paint will fix a waterproofing problem in their basement.
This is a mistake made by many DIYers and basement waterproofing contractors. Waterproofing paint is rarely, if ever installed correctly. If it is not installed correctly, it voids the warranty and effectiveness.
Never Repaint the Basement Wall
Installing new waterproofing paint over old waterproof paint will void the warranty. It is right there on their install instructions. Chances are most homeowners are unaware that reapplying paint to basement walls, voids warranty. If the paint worked so well, why would you need to reapply?
The fact the the warranty is voided during reapplication should tell you they don’t believe in their product.
Straight from the can of waterproofing paint:
“Surface must be clean and free from dirt,
dust, grease, oil, form release compound, or
paint.”