Anonymous asked in Home & GardenMaintenance & Repairs · 1 month ago

what to do about cracks on concrete garage floor?  can fill them in with cement or caulking? other?

how common and how serious? what causes them? (They are fairly wide cracks as well)

13 Answers

  • Droopy
    Lv 5
    1 month ago
    Favorite Answer

    with out seeing the cracks the repair can vary. If there 1/4 1/2 inch ect you can buy backer rod which you put in crack. basically all this does is seal the bottom so when you put the concrete repair in it doesn't continuously run threw the bottom.   As there could be a cavity under the cement which is wvat caused the cracks.  

    Next you'll need a cement crack repair you can pick it up at bout any hardware store. Its usually in a bottle you can pour it in until level.   Lot of these are poly so they can expand and contract.

    If there really bad or the grow an the slab becomes very unlevel youll need a company come in an use hydraulic cement.   Very neat process where they pump cement under the pad to level it.

  • garry
    Lv 4
    4 weeks ago

    its common , movement causes it , drying of the clay supporting the floor , and yes there are caulks that fix up the cracks , usually a silicone are epoxy based product. try you local hardware  store , they will have the right stuff .

  • 1 month ago

    Concrete outside cracks for two main reasons:  It's got an uneven load on it, or it's got water seeping up from underneath and it's weakening the concrete. (Concrete is not flexible and doesn't 'bounce' from harsh wear.) If you have cracks in your floor it could be either one, or both. Yes, you can fill them in--use a hydraulic cement if they're wide enough.  OR, get a mason out there to see if perhaps you need to re-level the floor underneath it. Maybe the foundation beneath the concrete has shifted or maybe there isn't anything you CAN do about it. They are quite common when concrete is placed over a shifting base, and unless they are causing sinking of the floor in one or more areas, probably not much to worry about. But get a pro to check it before you attempt any repairs. 

  • 1 month ago

    Please contact with expert for this work

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  • 1 month ago

    all you can do is fill them with No more gaps .  No more gaps is flexible . Then is you want you can paint the whole concrete floor 

  • 1 month ago

    The ground under your concrete is moving to the point that the slab cracks. Either the ground is super dry or has absorbed a lot of water.  

    You can find lots of YouTube videos that explain various ways to deal with minor cracks. Sometimes the problem can require mudjacking where mud and concrete are injected under a dipping slab to level it out and prevent further dropping. 

  • 1 month ago

    Tear it out and pour a new concrete floor.

  • CB
    Lv 7
    1 month ago

    There are LOTS of videos on how to repair and repair products (special concrete mixes to fill the cracks) you can buy in your local large hardware stores- not that difficult just takes time and patience.

  • Anonymous
    1 month ago

    Probably omitted any anti-crack mesh when it was poured. Concrete has no tensile strength so if the ground moves or settles the slab will crack. It can be repaired but ideally needs specialist techniques eg carbon fiber, otherwise it will fail again.

  • Anonymous
    1 month ago

    I think it's when the concrete settles unevenly. there are companies who can fix it. 

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