Our foundation has a 2" hole for the water main / well pipe which is about 7' below the ground outside. During spring thaw when there is several feet of snow melting, the ground gets saturated, and water leaks in between the pipe and the cement foundation.
Ideas for repairing from the inside would be ideal, however even options for what we can do by digging up around the foundation on the outside are appreciated.
This site suggests caulk or cement (perhaps this means Quikrete Hydraulic Water-Stop Cement?) will fail, epoxy is better though will eventually fail due to rigidity, preferring instead injecting a “high-viscosity polyurethane” (Perhaps 3M 525 or 3M 550 ?).
I also found this video suggesting this Water Line, Pipe and Penetration Kit
I've found 4 existing questions here, though no conclusive answer:
- talks about a foundation seal compound on the outside, though not specific enough to figure out which to try or how to apply.
- talks about cleaning and packing around the pipe from the inside with Wet patch? or Siliconizer? --> these seem to be roofing products, do we have anyone who can verify success with this approach?
- suggests using epoxy, though as I summarized above, it seems some sites suggest epoxy is too rigid and thus will fail over time.
- No proposed solution.
- Proposes Duct Seal --> The product page doesn't seem to talk about sealing leaks in foundation, is this the right long term solution?
- Proposes expanding foam is not good (doesn't elaborate on why).
- proposes a channel outside the house to keep water away --> won't work for us, as this is from spring melt of many feet of snow (the channel would be buried).