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question about new build

7 years ago

We are building a house and went to look at it today. It’s a slab foundation and was complete but it looks like they drilled into it to add this pipe. Does anyone know what it is for? Is this normal?

Comments (19)

  • 7 years ago

    Sorry forgot to add the picture

  • 7 years ago

    Electrical floor outlet?

  • 7 years ago

    That could be what it is, we were supposed to have one. Is it normal for them to lay the slab then drill into it after the fact? Like there’s no concern over the integrity of it after that?

  • PRO
    7 years ago

    Normally the rough electrical under the slab is in place before the slab is poured. It appears you had work done after the fact . . . or . . . you got hit by one of these:

  • 7 years ago

    No, it's not normal for the foundation slab to be drilled into after it has been poured. Especially when they hack into the drywall to splice off the existing electrical to do it.

  • 7 years ago

    Thanks for the input. How would you recommend we approach the builder? Obviously they can’t go back and repour the whole foundation but is there something we can do to be proactive in ensuring that it was correct and won’t cause any issues in the future?

  • 7 years ago

    Well, I might start with, "What in the nine levels of Dante's Hell do you think you are doing?" But that might be a teensy bit impolitic, I suppose. I presume you were not planning on a polished concrete floor, and that a subfloor should cover this before any additional finishes go down?


    Ask him the same question you've asked us. So, something like, "I noticed that you had to place the electrical outlet after the slab was poured. What concerns are there about the integrity of the slab? Will the alterations affect the subfloor in any way?"

  • 7 years ago

    ' Happens all the time -- nothing to be concerned about. '


    PPF.....that GC didn't know what the (*T^*%&) was doing unless this was extra after the fact which it sounds like it wasn't. It shouldn't effect the floor if it was poured correctly.

    Nicki......was it inspected before and after since this is unusual?

  • 7 years ago

    We do our inspection before move in, so that’s concerning since the flooring will already be down

  • 7 years ago

    As PPF mentions, this really does happen all the time and there is no issue with it if done properly.

  • 7 years ago

    You are apparently not providing oversight of the work. If you were, your inspection would have occurred before the pour.

  • 7 years ago

    You’re right, we bought the home after the slab was poured. I’m looking for advice on ensuring it’s rectified and won’t be an issue not on how I myself could have stopped it from happening. Thanks though.

  • 7 years ago
    last modified: 7 years ago

    It would depend on how thick the slab is and how it was reinforced. Reinforcement is normally at the midpoint of the slab or lower so if the slab 5" thick, a 2" deep trench should not disturb the reinforcement.

    It appears to have already been patched. Post a close up photo.

    Are you in an expansive soil area?

  • PRO
    7 years ago

    Okay, so the contractor omitted the rough-in box for the receptacle and a conduit prior to pouring the slab, but clearly caught it at some point and is in the process of correcting the problem at no cost to the client.

    It seems that homeowners and architects want to flog the contractor for the omission. When you consider the thousands of details that go into a new construction project it's not unreasonable to expect humans to make a few mistakes. This contractor caught the mistake and is fixing it. What more do you want?

  • 7 years ago

    Thank you I appreciate that response, I agree human error just wanted to ensure that there would be no issue with that in the future! But overall seems like people believe it won’t be which makes me feel much better.

  • 7 years ago

    "You’re right, we bought the home after the slab was poured."


    Was the floor outlet supposed to be there prior or was this added by you? If added by you this is the only way to make it happen.

  • 7 years ago

    When this happens it is either because: 1. it was in the drawings and/or contract but it was forgotten or 2. one of the parties involved added it after the slab was already poured.


    Separate of how it was installed, this floor outlet seems like it is in a very odd location. It looks like it is right in the middle of the room. Do you have a cocktail table or some other central feature that requires plugging in? If you plan to have an area rug it would get burried under that rug.

  • PRO
    7 years ago

    OP "bought" the home after slab was poured. With a room that size, I doubt a floor plug would have been standard, so my guess is OP added it as a part of the purchase agreement, further guessing OP will not own the property until they close escrow after completion.


    Cutting through existing work is not optimal, but its done everywhere, otherwise there would never be any remodeling, street repairs, etc.