Preventing Ground Water Intrusion Through Concrete Structures:
Do you have seasonal or constant ground water intrusion issues with your below grade concrete structure? One of the best solutions to this problem is polyurethane crack injection and curtain grouting.
Kodiak Concrete Lifting LLC can help with your water intrusion issues; whether it’s hairline cracks, larger high flow water leaks, or water intrusion through concrete cold joints and below grade penetrations.
Water intrusion and excess moisture can damage structures, cause the growth of harmful molds, and potentially damage your property values as well as your health; let Kodiak Concrete Lifting LLC help with our polyurethane injection processes that address the negative side (outside) of the structure to prevent water intrusion and protect your structure and it’s value.
Polyurethane injection is the most effective water stop method for addressing water intrusion problems on existing below grade concrete structures. Because it address the issue on the negative (outside) side of the structure; rather than trying to simply patch the crack or joint on the positive (inside) side of the structure.
By injecting single component, water activated, hydrophobic, closed cell, polyurethane liquid foam under pressure to the negative side of the structure and through the body of the cracks; we are able to fill in the gaps, voids, fishers, holes, cracks, honeycombed and overly porous areas of the structure creating a water resistant seal between the negative side of the structure and the ground water on the outside as the liquid expands into a solid foam.
The three main water stop methods used are: crack injection, curtain grouting, and soak and pack.
Crack injection is performed by drilling 1/2” holes at 45° angles parallel with the length of the crack in order to intersect the center of the crack along the length of the crack at approximately 12” centers. A closed cell, hydrophobic, single component polyurethane liquid foam is then injected through mechanical ports that are installed in the 1/2” holes. This foam is water activated and quickly reacts from a liquid to a solid state expanding and filling the crack with a flexible water tight foam.
Curtain grouting is performed by drilling a series or grid pattern of 1/2” holes through the concrete structure anywhere from 6 inch centers up to 3 foot centers, depending on the structure type, area being treated, the type of backfill soil and it’s level of compaction, etc. Once the holes are drilled a high expansion, single component, water activated, closed cell, liquid polyurethane foam is pressure injected through 1/2” mechanical ports. The liquid foam begins to react with the water and expands and fills the space between the negative side of the structure and the soil and water on the outside of the structure. This process is repeated along the grid of holes until there is a continuous layer of foam on the negative side of the structure.
Soak and pack is performed by soaking a natural oil free fiber with a fast reacting polyurethane foam, the saturated fiber is then packed into large and typically high flowing cracks and joints in the structure. The foam then reacts and fills the crack or joint with foam sealing off the water leak. This process is typically followed up with localized curtain grouting around the treated area of the structure.
Contact Kodiak Concrete Lifting LLC today for your free water stop consultation and estimate.
Give us a call for a free evaluation and written bid; to permanently solve your leaking foundation problems!
