Why Your St. Louis Basement Is Leaking

We’re in the rainy season now in St. Louis, where Cardinals games can be iffy and the possibility of a rainout looms large.  It is also the time of year when we get a lot of calls about basements leaking because that water has nowhere to go and finds a way into your home.  There are a lot of causes of basement leaks, but here’s a good snapshot of why your St. Louis basement is leaking.

Causes of Basement Leaks

The most common cause for your basement to leak is when the ground soil around your foundation gets too saturated and penetrates the foundation due to immense pressure.

There are two types of pressure that can cause this – hydrostatic pressure and lateral pressure.  Hydrostatic pressure is when water is absorbed by soil above the water table and closer to the surface, and after that soil is saturated, storm water that hasn’t been absorbed forces the water table up.  This creates hydrostatic pressure below the foundation and causes water to e forced into the foundation, causing leaks.

Lateral pressure is when the looser soil around your foundation, which was loosened during the excavation process on your foundation, becomes saturated and forces pressure on the sides of your foundation, hence lateral pressure.  This happens a lot when your gutters and downspouts are clogged and flood the area around your foundation with water.

Floor cracks develop when the hydrostatic pressure from below forces the concrete apart and strains the seams in the layers of concrete by pressing up on the concrete in the floor.  When the water table rises, these cracks cause your basement floor to flood.

Continue reading
  24 Hits
  0 Comments
24 Hits
0 Comments

Fix Basement Cracks With Epoxy Filling

Injection of epoxies under pressure may be used to bond the cracks having greater than or equal to 0.05mm opening. This method is not applicable if the crack is active, the cracks are large in number, or when the water leakage can not be controlled. If the cause of the cracking has not been corrected, it will reoccur near the original crack. Extreme caution must be exercised when injecting cracks that are not visible on all surfaces.

Epoxy injection is commonly used to restore the pre-cracking condition of the member without increasing its strength. The epoxy tensile bond to the concrete substrate is stronger than the concrete’s tensile strength. Future cracking may occur at the same load as that of the original uncracked member but at different locations. Strengthening is provided by installing additional reinforcement across the failure plane in combination with the resin injection. Frequently, internal or external reinforcement is installed in combination with the epoxy injection for strengthening and restoration.Crack injection can be successfully performed on cracks as narrow as 0.013 mm in width with general epoxy injection resins. Cracks with less width can be injected with epoxy or other polymer systems having a low viscosity of 200 cps.

 Poured foundation cracks may be repaired by using low-pressure injection of an epoxy or polyurethane foam material. For the repair of concrete floor cracks, certain epoxies and polyurea materials exists, suitable for such slab repairs.

Epoxies and other resins lose strength when exposed to fire or sustained elevated temperatures and fireproofing protection is required for such structural repairs. Epoxies that are labeled water-insensitive during curing may develop milky white bond lines if injected into wet or damp cracks. Verification that the epoxy is completely water-insensitive should be made by injecting the test epoxy into pre-wetted cracks, then evaluating the cored sample of the cured epoxy injected into the crack. Slabs and walls restrained at their ends may develop full-depth slab cracks due to shrinkage as a result of volume changes during concrete curing or during extreme thermal fluctuations. The cause for the local overstress should be either eliminated or considered in the repair. Injecting the crack at the midrange temperature minimizes thermal stress fluctuations.

Epoxy injection for Concrete Crack Repair in foundations, basements, beams, columns, slabs, walls and other concrete structures

Call the Epoxy Filling experts at Nick Gress Foundations at 636-219-1967 or 314-409-1497 to learn more or get a free estimate.  

  107 Hits
  0 Comments
107 Hits
0 Comments