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Soil is heavy enough by itself but when water is added the weight can triple. Exterior waterproofing not only relieves the pressure but also keeps the basement walls from wicking water. This wicking will not only leave a substance call efflorescence but also raises humidity levels high enough to support mold growth.
Important factors that indicate the need for foundation waterproofing.
The appearance of pools of water in your basement can be an indication that your foundation is porous. Cracks on the foundation can allow water and moisture to enter the basement whenever it rains or when there is a plumbing leak.
If there is an unexplained musty odor in your basement, there is a high chance that you are facing a mold problem. Mold grows in humid conditions and produces smelly compounds as it grows. The bad smell therefore indicates that your foundation is letting water or moisture into the basement.
Besides having a bad smell in your basement, you may also see patches of mold on the foundation and basement walls, on the basement floor, and on structures such as the ceiling and drywall. All these signs show that your basement is damp and should be waterproofed.
Efflorescence is the movement of salts through a porous material. If your foundation is porous, it will allow water from outside to pass through it. Salts dissolved in water will be deposited on your basement’s walls, and when they dry out, they form a crystalline or powdery substance. Sealing cracks in the foundation will eliminate this problem.
Wooden structures undergo dry rot when their moisture content exceeds 20%. If you notice signs of dry rot on wooden structures such as door frames, furniture, staircases and others within your basement, then your basement probably has a high level of moisture and your foundation needs waterproofing.