How to Waterproof Your Basement from the Inside

Sometimes it is easy to tell that you have dampness inside of your basement. If it is severe, you will notice puddles or visually be able to tell that there is a variation in the color of cement. Other times, it may be damp, but not as noticeably. This could be when you open the door to your basement and it smells musty or you look at an area near a wall and notice that there is mildew on it. The good news is, you can fix the problem, no matter how severe it may be, and you can do it from the inside in most cases.

If you are wondering how you can waterproof your basement from the inside, you do not need to look any further than your local hardware store. There are concrete waterproofing coats that you can put on the walls and floor, even if you have previously painted them. Other, slightly cheaper, alternatives include a silicate based sealer and an acrylic paint. You should keep in mind that the silicate based treatment option will not work if you have painted your walls previously.

Before you begin painting, you need to use a polyurethane caulk to fill in all gaps and cracks that are present in the walls or floor of your basement. Polyurethane caulking is designed for masonry work. All cracks that are larger may need a different type of filler. There is an epoxy filler that you can use, but you can also ask for advice on other ways to fill in the cracks before you get started.

After that is finished, using paint or a coating on your basement walls and floor is not a difficult process. All three options can be applied with a brush, but you do need a brush that will apply a thick layer if you plan to use the concrete waterproofing type. Both the silicate and acrylic types can be applied using rollers or a paint sprayer as well. The downside is that you may need more than one gallon, even if you have a smaller sized basement.

Once the paints and fillers have dried, you may want to check for further moisture by using tin foil taped securely to the wall where you found the most moisture. When doing this, make sure you tape all sides of a square foot of tin foil. Leave it alone for a couple days and remove it. If there is still moisture on the wall side, you will need to seal the outside of your basement. If there is water away from the wall side of the foil, you have other issues that need to be addressed.

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