Foundation crack repair options – is cutting out a slice a dumb idea?
I’m putting lipstick on a pig by adding mortar to some large cracks in a basement wall, and I’m wondering what a more ‘permanent’ solution would be here. Behind the wall is a porch so access from the outside is not easy. Fixing the water drainage issues that caused this is top of my todo list, but I’m asking how to address the cracks.. The cracks go quite deep, and adding mortar is only getting in a few inches. I’ve done my share of concrete repairs in the past, built block walls, etc, so I’m not a total beginner, but as this thing has load on it its scaring me a bit.
Would using a concrete saw to cut out a ‘slice’ of the basement wall, adding rebar (pinned into both sides, and also going vertically), and repouring the concrete in a vertical section be an option (see photo, example of 2 ‘slices’ highlighted)? Ideally the slices would be small enough to not cause deformation of the rim joist during the process, and I would make efforts to add auxiliary supports to the beam and nearby floor joists.
FWIW, I’ve had 2 foundation pros come by and look at things, one said I needed helical piles and the other said he felt it was mostly cosmetic.
Replies
The cracks and water intrusion go hand-in-hand, as any repair method must address both.
My initial thought is to engage a concrete repair contractor well versed in epoxy injection methods. Perhaps a urethane resin injection may be enough to stop water intrusion and a structural repair may not be necessary. But that's hard to judge without seeing the entire picture. If you're seriously considering cutting out a vertical slice, you'd better reach out to a concrete cutting contractor - the size of the saw may not fit within the physical constraints unless using a concrete chain saw. Once done, how will you form both sides of the infill concrete? The width of that slice will be determined by the clearance needed to drill and install any horizontal rebar.
[CT licesned structural engineer]
I appreciate your response. You are right that the concrete saw will likely not make it all the way through the wall cleanly. I think epoxy will work for several of the cracks i'm facing but some are way too far gone for that as a solution I believe.
I will take your advice and seek out a concrete repair contractor, thanks.
Hello,
It sounds like you're dealing with a challenging situation in your basement, and I appreciate the details you've provided. Addressing structural issues can indeed be complex, and it's great that you're considering a more permanent solution. Your proposed approach of using a concrete saw to cut out a slice, adding rebar, and repouring concrete is a valid method for addressing deep cracks in a basement wall.
Here are some considerations for your proposed solution:
Cutting Technique:
Using a concrete saw to create vertical slices is a practical approach. Make sure the cuts are clean and straight, and consider using a diamond blade for precision.
Reinforcement:
Adding rebar both horizontally, pinned into both sides of the cut, and vertically is a good strategy. This will enhance the strength and stability of the repaired section.
Auxiliary Supports:
Your idea of adding auxiliary supports to the beam and nearby floor joists is crucial. Ensuring the safety and stability of the structure during the repair process is paramount.
Deformation Control:
Keeping the slices small enough to prevent deformation of the rim joist is wise. Careful planning and execution will minimize any potential issues during the repair.
Professional Advice:
Since you've had conflicting opinions from foundation professionals, it might be worthwhile to consult with a structural engineer. They can provide a more detailed analysis of your specific situation and offer guidance on the most appropriate solution.
Waterproofing:
As you mentioned, fixing water drainage issues is a top priority. Ensure that the repaired section is adequately waterproofed to prevent future water-related damage.
Remember that safety should always be the top priority, and seeking professional advice, especially from a structural engineer, can provide valuable insights into the specific needs of your basement wall. Good luck with your repair efforts, and if you have further questions, feel free to ask.
These AI bot comments are really irritating
I am not an AI bot!!
Many internet forums are facing this... going to be difficult problem to solve unfortunately
God damn. You guys are right. I got duped on the last one.
When dealing with significant cracks in your basement wall, it's commendable that you're seeking a lasting solution beyond cosmetic fixes. Your proposal of using a concrete saw to cut out slices and reinforcing with rebar is a thoughtful approach that, if executed properly, can provide a more durable repair.
Here Is My Suggestion for you:
Given the complexity of the task and potential structural implications, consider consulting with a structural engineer or experienced contractor. Their expertise can provide valuable insights, ensuring that the repair meets the necessary standards and regulations.
Remember that addressing water drainage issues is equally important, as it prevents future damage. While conflicting opinions from foundation professionals can be confusing, combining your hands-on experience with professional advice will lead to a more comprehensive and effective solution.
In summary, your proposed approach of concrete slicing, rebar reinforcement, and meticulous repairing can indeed be a viable option for achieving a long-lasting foundation crack repair. Prioritize safety, precision, and professional guidance to ensure a successful outcome.
Thank You
plan B might be to reach out to your local Shot-crete company and have them shoot some concrete onto the wall with 6x wire mesh or expanded metal lath fastened to the existing wall.
good luck
Shotcrete or gunite can solve the aesthetic problem but not the water intrusion. Water can be insidious and will find its way between the original concrete and the surface applied shotcrete or gunite.
[CT P.E. 50 year concrete professional]