Cracks & Crawl Space

Foundation Crack repair

Cracks in foundation are caused by the settling of the foundation or from hydrostatic pressure that may be applied to the walls. One small crack can actually flood an entire basement, or a small seeping crack can lead to mold behind drywall and baseboards causing even more serious issues for the homeowner.

Polyurethane Injection

Polyurethane injection involves injecting leaking basement cracks with a foam rubber seal. These injections provide a permanent seal when properly injected into a crack by a professional waterproofing specialist like Perma Jack. 

The Advantages of Polyurethane Crack Injection

  • Arguably its most significant advantage, polyurethane can be used regardless of the condition of the crack and the weather. It doesn’t matter if the crack is actively leaking, full of mud and/or mineral deposits, or if it is fine or wide.
  • Polyurethane injection can involve a crack flushing process to clean out the crack prior to injection.
  • The chemical expansion of the polyurethane (typically 5-10 times its original volume) makes polyurethane very effective at filling voids within the concrete; these voids are typically invisible when you look at the wall and are often associated with the porosity of the concrete.
  • Occasionally, high injection pressures are required to fill cracks that are very fine and/or when concrete is completely saturated with water and therefore weak. Using electric pumps, it is possible to obtain injection pressures up to 3200 psi.
  • The rapid curing of polyurethane is beneficial when a leaking crack is flooding the basement; this is an important attribute when waterstopping is urgently needed.
  • Like the epoxy crack injection, the low pressure polyurethane crack injection provides the injection technician with positive confirmation that the crack has been filled completely.
  • Because water accelerates the curing process for polyurethane, the effectiveness of a polyurethane crack injection can be confirmed while the injection is in progress. This is accomplished by flooding the wall during the injection, thus providing confirmation that the repaired crack no longer leaks.

Crawl Space Issues?

Most homeowners never even go in the crawl space of their home. Crawl spaces with dirt floors, excessive humidity and improper support can lead to mold in the home, sagging floors and foundation damage.

Look for:

  • Condensation
  • Crawl space water
  • High indoor humidity
  • Sagging or bouncing floors
  • Damaged floor joists
  • Vented crawl space
  • Wet/failing crawl space insulation
  • Loose/failing vapor barrier
  • Mildew & mold-like growth
  • Rusted, corroded metal
  • Odors & allergens


PermaJack can lift and stabilize existing beams and floor joists in your crawl space. PermaJack can install additional support beams and permanently mounted stabilizer jacks to help level floors and reduce sagging areas, and to permanently stabilize the home.

stabilizer jack
Many homes are supported by old bricks or cinder blocks with wooden shims and can be dangerous and unstable. PermaJack offers a 25 year warranty and a permanent solution. In addition, PermaJack offers complete crawl space waterproofing.

PermaJack and sister company Bio-Meth Management are mold remediation specialists and can remediate mold in the crawl space, install vapor barriers and treat humidity issues with the E-Z Breathe® crawl space system.

E_Z Breath crawl space system

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