Crack Injection
for foundation repair and restoration.

High pressure crack injection will completely seal leaks through cracks in your foundation.
 

Complete structural or leakage repair of cracked concrete walls and floors for residential applications.  This project took place in Sebright, ON east of Orillia.

Methods used may be epoxy injection or polyurethane injection.

This project allowed the owners to build their cottage on a previously damaged foundation, saving thousands of dollars.

What is crack injection?

 

Crack injection is the process by which a resin or grout (epoxy or polyurethane) is injected into a crack or void under high or low pressure.  Polyurethane is flexible and is used to stop water leaks, while epoxy is a glue used to bond sections of a wall back together as a structural repair. 

 

In order to accomplish this operation, the area is first exposed and the crack site cleaned up so we can see the crack.

 

Many home owners use patching compounds such as hydraulic cement to stop leaks, with limited or temporary success.  The moment the wall flexes, the rigid patch cracks and leaks again.  Another poor repair method is injection using surface mount ports and a hand operated dispenser to "fill" the crack with epoxy or polyurethane.  We fix many of these so called repaired cracks because there is no way to know if the crack has been filled.  Tight cracks cannot be properly repaired with this method and we do not use it.  Many home builders tend to use this method because they can get someone in to do it cheap, (maybe even their own guy), so they can get past the two year "New Home Warranty" requirements.

 

However,

Once fully exposed, holes are drilled into the crack by starting the hole beside the crack and intersecting it in mid-wall.

  The distance from the crack to begin the hole and the angle of the drill are critical in achieving a good injection.  Quality of the concrete to be injected is also very important in order for the injection ports to hold during injection and maintain a good seal.

Ports or packers are inserted into the cleaned out holes.

Then grease nipples are screwed into the packers.  This allows us to connect a high pressure electric pump to the crack.

We use high quality electric injection pumps delivering up to 2200 psi on virtually every injection in order to deliver the resin or grout at the correct pressure and volume.

Once injected, the crack will be completely filled from front to back and top to bottom.  Epoxy is used on passive (non-moving) cracks for structural repairs, while polyurethane is used on active (moving or potential for moving) cracks. 

 

The cause for most residential foundation cracks is shrinkage of the concrete wall shortly after construction.  They may leak but are not usually a structural concern.  Foundation settlement will cause a different type of crack and should be looked at by an engineer to determine if the settling problem is ongoing.  Injection can be done on either side of the wall.

In any case, we can fix the problem that you are having.  Johnson Group Contracting will provide you with a Limited 100% lifetime guarantee that the injected crack will not leak.  Our warrantee is transferable to whomever you sell your home to.
(some conditions apply)

The crack on the right was quite a mess when we arrived due to previous repairs and persistent leakage.  However, this crack no longer leaks.