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BT - Rod Hole Injection

Rod Hole Injection Services

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Learn about the Rod Hole and Tie Rod injection process utilizing Polyurethane to stop the water leak within your basement.

Concrete Crack Injection Icon Poured Foundation Rod Hole Repair

Rod Hole Injection:
Rod holes are created by the forming crew responsible for building your foundation wall. In order to hold the concrete forms together and to prevent bulging from the weight of wet concrete, 5/8" rods are passed through the forms from one side to the other. After the concrete is poured, the forms are stripped off and the rods are removed leaving a 5/8" hole passing right through your foundation wall. The holes are then patched with a dollop of hydraulic cement usually on the inside and the outside. However, the middle of the rod hole is still a large air void.

Concrete Rod Hole Injection Service Process:

Rod Hole is Exposed:
First the rod hole is exposed by removing any excess hydraulic cement which was applied at the time the house foundation was built.

Rod Hole Drilled:
A 1/2" hole is drilled on an angle into the side of the rod hole. This allows access to the rod hole for the Polyurethane injection process.

Check Ball Packer Port Installation:
A 3/8" check ball packer port is hammered into the drilled hole. The check ball packer allows our injection specialist to access the rod hole by using a specialized injection gun.

Polyurethane Injection Begins:
Polyurethane is pumped into the rod hole through the check ball packer port until the entire hole is filled. This is the preferred method of rod hole repair since the size of the rod hole requires something that will swell and gel, by forming air bubbles, to fill the large space and seal it. To put this into perspective, a rod hole is 5/8" in diameter and goes all the way through your wall to the exterior – this is the same diameter as your garden hose.

Concrete Crack Injection Icon Poured Foundation Tie Rod Repair

Tie Rod Injection:
Tie rod holes are similar to rod holes in that they too are used during the building of your foundation wall to hold the forms together during the concrete pour and cure process. The difference is, tie rods are 1/4" in diameter and they are left in the wall. Therefore they don't leave a large air void in your wall which is good. However, tie rods are made of metal which is bad since metal corrodes in the presence of water and oxygen. As the metal corrodes, its mass decreases (i.e. it shrinks) and eventually leaves a void around the tie rod which allows water to pass through into your basement. To keep the metal tie rods dry, the builder usually applies a dollop of tar to the outside of each tie rod hole. The tar is not impervious to soil salts and therefore begins to break down within 3 to 5 years.

Concrete Tie Rod Injection Service Process:

Injection Port Installation:
First, a surface port is bonded to wall over the tie rod hole with epoxy thixotropic paste. The curing process will typically take from 30-45 min per Tie Rod.

Injection Begins after Hardening:
Once the epoxy thixotropic paste hardens, the injection phase begins by injecting low viscosity epoxy through the surface port until the hole is filled and the entire rod inside the wall is coated and encapsulated with epoxy. This seals the void around the rod to prevent water from forcing its way through. Also, since the metal rod is now encapsulated in epoxy, further corrosion is now impossible.

Rod Hole & Tie Rod Injection Warranty »

  • 10-Year - Basement Technologies® no leak warranty
  • Fully transferable warranty
  • Permanant Rod Hole / Tie Rod and Repair Solutions

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Very good, competent and friendly crew.

RATING 10/10 ~ Mr. Rothwell (Midland, ON)

Very informative and Friendly.

RATING 9.5/10 ~ Co-Op Appartments (Bold St. Hamilton, ON)

CRACK INJECTION TESTIMONIALS »

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