Tie Rod Hole Leak Repair & Waterproofing (Permanent Interior Repair)
A tie-rod hole is 5/8″ in diameter and can leak quite a bit when there is alot of water pressure against a foundation wall
Tie rod hole leaks are one of the most common causes of basement seepage in poured concrete foundations.
They often appear as a dark grey circle — then into visible water streaks on the wall during rain.
The good news: tie rod hole leaks can be permanently repaired from inside, with no exterior excavation.
Since 2002, AquaGuard Injection & Waterproofing® has repaired thousands of tie rod hole leaks across the GTA — backed by a 25 year guarantee.
What Is a Tie Rod Hole Leak?
During construction, steel tie rods hold the wall forms together while the concrete cures. After the forms are removed, these rods are removed leaving an open hole; sometimes the tie-rods remain stuck inside the wall.
When tie-rod holes are leaking, sometimes there are visible rust stains, but mostly there is visible mud or mineral staining on the foundation wall just beneath the rod hole.
Tie-rods hold the forms together as the concrete cures. There are 4 tie-rods used to hold together a pair of forms and they are typically patched over by the builder during home construction
Common Signs of a Tie Rod Hole Leak
- Mud staining on a poured concrete wall in line with a tie-rod hole
- Mineral staining at a tie-rod hole
- Water streaks running down the wall from a tie-rod hole during wet weather
- A dark area surrounding a tie-rod hole indicative of concrete saturation
Visual Signs of Tie Rod Hole Leaks
Leaking tie-rod hole with mineral staining
Water saturated and stained concrete surrounding tie-rod holes
Most leaking tie-rod holes will have visible mud staining
How We Repair Tie Rod Hole Leaks (No Excavation)
- Locate the leaking tie-rod hole.
- Plug the hole to minimize the escape of injected resin.
- Drill a channel into the rod hole.
- Inject polyurethane resin into the cavity (tie-rod hole).
- The polyurethane expands to completely fill the cavity.
- Leak path is sealed permanently—not a surface patch.
- Excess polyurethane is scraped off for a clean, professional look.
This is a proper repair that keeps water on the exterior of the foundation. Simply patching over a tie-rod hole with hydraulic cement, or a similar product, will cause water to be trapped in the wall and cause concrete deterioration over time. Patch repairs often do not stand the test of time.
This is what a completed tie-rod hole injection looks like
Pricing & Warranty
Most tie rod leaks can be repaired for as low as $100 per hole when multiple tie rod leaks are repaired in the same appointment.
| Number of Tie Rod Holes | Cost per Hole (Typical) |
|---|---|
| 1 hole | $245–$295 |
| 2–4 holes | $137–$175 each |
| 5+ holes | As low as $100 each |
- ✅ No excavation required
- ✅ Work completed in 60–90 minutes depending on the quantity
- ✅ Long lasting, guaranteed waterproofing seal
Why Homeowners Choose AquaGuard Injection
- In business since 2002
- Thousands of tie rod hole leaks repaired across the GTA
- Specialists in basement leak repair – we only sell you what you need
- No digging required
- 25 year guarantee on the repair
Also Have a Visible Foundation Crack?
It’s common to have both a tie rod leak and a crack leak — sometimes cracks run through tie-rod holes. We repair foundation cracks too (interior high pressure injection and exterior options).
Service Area – We Come to You
We repair tie rod leaks throughout the Greater Toronto Area, including:
Aurora,
Newmarket,
Richmond Hill,
Vaughan,
Mississauga,
Oakville,
Burlington,
Markham,
Bradford,
King City,
Woodbridge.
Contact Us to Request a Quote
Same-day and next-day scheduling available.
Tie Rod Hole Leak – FAQs
How do I know if I have a tie rod leak?
Can tie rod leaks be repaired from the inside?
How long does the repair take?
Will it leak again after the repair?