The clamminess you feel when you rest your hand against an unfinished concrete basement wall may be more than just the cool of the concrete. Water can work its way in through cracks in the slab, but that's not as concerning as the reality of concrete. Contrary to what most people perceive, concrete does not "dry" and is not inherently waterproof. Concrete cures, meaning that it sets hard, suspending the moisture in the mix.

While the concrete may feel dry to touch, save for the surface the water is still there. The relatively dry surface is now porous, and therefore ready to absorb water. That is why untreated and damp concrete turns dark grey when it gets wet. Moistre is wicking into the pores of the concrete. Without the air of basement waterproofing systems, continued expoure can work water through the entirety of the concrete, supplying the basement with a continued stream of moisture. This preps the surface for mold and mildew.

Although there are types of concrete that resist water penetration, ferroconcrete is not suitable for many modern housing designs and hydrophobic concrete is very costly. Also, neither of these is really waterproof in the same way as a basement waterproofing system. Ferroconcrete uses a fine aggregate and dense mix to limit its porosity while hydrophobic concrete contains compounds that make its surface moisture bead up and shed more than normal concrete.

To fully waterproof a concrete foundation, you must install a basement waterproofing system. The best approach would be to lay the foundation on a drainage layer, and cover the outside of the foundation with a bitumen barrier such as that used under roofing shingles. This protective layer must be put on before the area around the foundation is back-filled by the contractor.

If, however, the foundation must be waterproofed after the fact, you can find basement waterproofing products on the market which can be placed on the interior face of the foundation. Some of these must be put on repeatedly, and you should consider that as you are trying to determine your approach to the situation. There are also water control mechanisms that detour rainwater from foundations to maintain dryness. While soft layers of thin plastic can be utilized on a foundation's interior to ensure the dryness of a finished basement, you can still encounter difficulties in the future if mold and mildew grow beneath this sheeting.

You should check your basement and foundation then repair any problems before they become worse. Whether you live in a wet or dry climate, an unsatisfactory waterproofing job can flood your basement simply from water seeping through the concrete. This can lead to always having a few inches of water on your floor. In this case a sump pump may be the only solution to take care of the water accumulation. The cost of waterproofing your basement will vary depending on the type of system and whether the installation is a do-it-yourself project.

Damp, untreated concrete turns a dark gray when it gets wet, that moisture is wicking into the concrete. Hence waterproofing basement becomes essential. Without basement waterproofing systems, continuous exposure can work water all the way through the concrete and supply your basement with a steady stream of moisture for mold and mildew to grow on. Although there are types of concrete that resist water penetration, ferroconcrete is not suitable for many modern housing designs and hydrophobic concrete is very costly. If, however, the foundation must be waterproofed after the fact, you can find basement waterproofing products on the market that can be placed on the interior face of the foundation.