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Damp Proofing A Concrete Floor In An Existing Home

How Anyone Can Prevent Moisture From Rising Up Through A Concrete Slab Floor

Damp spots covering a concrete slab floor in a basement

Water can seep up through a concrete floor through floor cracks, as well as through the wall-floor joint. It can also seep directly through the concrete floor, resulting in damp or wet spots.

Basements are notoriously damp, humid spaces -- and one of the reasons for this is moisture passing through the concrete foundation walls and slab floors. The porosity of concrete is one of the primary reasons that basements tend to be damp, humid spaces.

If your concrete slab floor is not sealed, then this moisture is becoming humidity -- either in your basement or within your carpet. Over time, this will encourage the growth of mold, mildew, rot, and dust mites in your home, leading to damage to your building materials and unhealthy allergens within your house.

By sealing the concrete with a penetrating concrete sealant, you can quickly and permanently avoid moisture-related issues with your concrete floor.

Why Do Concrete Slab Floors Get Damp With Moisture?

waterproof paint peeling off of a concrete floor in a basement

Waterproof paints can easily peel off a floor that has moisture penetration. They're also vulnerable to wear and tear from day-to-day foot traffic. Partially failed waterproof paints are difficult and labor-intensive to clean.

Concrete is a porous material that will accept water, moisture, and water vapor readily from the foundation soils around your home. This moisture can be passing through in the form of water vapor even when your slab floor doesn't appear to be damp.

One way to test the amount of moisture passing through your slab floor is to lay a sheet of plastic on your floor for several days. If the surface under the plastic is damp, then you have evidence of moisture penetration in the concrete slab.

Along with moisture, water will bring a small amount of minerals with it. As the water passes into the air in your basement, this will be left behind as a mineral salt known as efflorescence, which appears on your floor as a white, powdery substance.

Sealing Concrete Slab Floors Easily & Permanently

water beading on a concrete surface that's been treated with a concrete sealer
Once you seal your concrete, you will notice that water will no longer absorb into the pores of your slab floor. Instead, it will bead on the surface

Concrete Treat: Concrete Sealer and Blanket can protect your basement carpet, wood flooring, or linoleum from being damaged by moisture rising through the concrete below. It applies easily, able to be sprayed, brushed, or rolled on to your concrete.

When applied to your basement floors or walls, Concrete Treat fills each pore and opening in the concrete that would allow moisture in, creating a glasslike bond within. Once dry, wet spots will not collect beneath your flooring from the concrete. This will help you to prevent mold, rot, and odors in your finished carpet. With one application, you've protected your investment and made your home a healthier, more comfortable place. Order Concrete Treat today!

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