In discussing poured concrete foundations, in addition to cracks there are numerous ways in which water can come through basement walls. With very few exceptions, all basement leaks through a poured concrete foundation can be eliminated using pressurized polyurethane injection.

Listed below are the sources of basement leaks in poured concrete foundations; all of these leaks can be waterproofed using pressurized polyurethane injection:

1. Foundation cracks;
2. Tie-rod holes;
3. Snap rod leaks;
4. Honeycombing;
5. Openings for electrical conduits and air conditioning lines;
6. I-beam pocket leaks;
7. Cold pour seams;
8. Concrete cracks in general as well as cracks that have been previously injected; and
9. Expansion joints.

The widespread use of polyurethane injection within the waterproofing industry, to a great extent, is attributable to the properties of polyurethane injection resins (or grouts) in general. While there are literally hundreds of formulations available, the expansive properties of polyurethane, and it's elasticity, make it an attractive product in many waterproofing applications. Combined with high injection pressures (1200 - 3000 psi), it is possible to fill virtually any cavity in a poured concrete structure using polyurethane injection techniques. Below are a few pictures of applications where polyurethane injection is typically used.

A polyurethane crack injection that is in progress The high pressure injection of polyurethane and it's expansive properties make it an ideal product for waterproofing The high pressure expansion of polyurethane makes it ideal for waterproofing leaking cracks that were previously repaired

The force of the expanding polyurethane within the tie-rod hole fills the hole through the entire thickness of the wall keeping water outside the building envelope where it belongs

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