How-To Videos

How to Know if a Foundation Crack in Your Home Is Serious

By: Danny Lipford

Most cracks in slabs are small expansion cracks that should not pose a problem. If the crack will show, it can be filled with a concrete repair caulk. However, if the crack is 1/4” wide or wider, and one side is higher than the other, you may have a settling problem that should be examined by a structural engineer.


Please Leave a Comment

15 Comments on “How to Know if a Foundation Crack in Your Home Is Serious”

You can follow comments to this article by subscribing to the RSS news feed with your favorite feed reader.

  • Official Comment:

    Thomas Boni Says:
    June 7th, 2019 at 9:57 am

    Hi, Joan,
    It’s hard to know what could be happening without being there in person, but here’s a tip regarding digging.
    If you choose to do this, first call 811 to make sure no utility lines are in the area.
    Take care!

  • joan Says:
    June 5th, 2019 at 7:59 am

    Hi , Just recently finished my attic ,and side stoop has cracked and the 2 foot wall attached is on the same side has many cracks that have widen considerably. should I dig down by the house foundation , to see what’s going on.

  • Official Comment:

    Thomas Boni Says:
    January 14th, 2019 at 10:57 am

    Hi, Krystal!
    The U.S. Department of Housing and Urban Development has resources that help tenants understand their rights.
    Here’s a direct link to the state listings:
    Good luck!

  • Krystal S Seffron Says:
    January 11th, 2019 at 7:55 pm

    I am renting a house & I’ve noticed a bunch of cracks in the walls on the ceiling on the back of the house and in pavement in backyard. What do I do if the landlord does nothing about them.

  • Official Comment:

    Thomas Boni Says:
    December 19th, 2018 at 9:08 am

    Hi, Amber,
    Concrete expands and contracts as the seasons change, so cracks in a concrete driveway are normal.
    However, without being there in person, and understanding all the factors involved, we can’t say whether you should be worried about these particular cracks.
    It’s always best to hire a professional contractor who can inspect the area, consider all the factors, and offer an informed opinion.
    In the meantime, since concrete cracks are so common, there are solutions!
    We recommend checking out these resources:
    Good luck!

  • Amber Hoover Says:
    December 18th, 2018 at 7:46 pm

    I bought a house that is less than a year old and I have c2 cracks on my driveway and three on my back porch and yesterday a new one was found on my front porch the width of the entrance they are all less than an 1/8 of an inch and level but it has me concerned being it’s a brand new house!! Should I be worried???

  • Official Comment:

    Thomas Boni Says:
    August 31st, 2018 at 2:21 pm

    Hi, Lillian,
    Please include a photo with your question so we can understand the issue.
    We accept photos at [email protected].
    Thanks so much!

  • Lillian Says:
    August 31st, 2018 at 1:51 pm

    I just noticed a long crack staring mid height of the wall tilting downwards horizontally. It is close but less than 1/8 of an inch width. Is this serious?
    If so, who should I call and where can I find them?

    Thank you very much for your response.

  • Official Comment:

    Thomas Boni Says:
    August 14th, 2018 at 1:33 pm

    Hi, Anna,
    Please include a photo with your question so we can understand the issue.
    We accept photos at [email protected].
    Thanks so much!

  • Anna Minkiewicz Says:
    August 8th, 2018 at 11:28 pm

    I bought a townhouse from Mattamy in 2015
    this year I have leak during rain from the corner of the house
    I had a flooding from it
    I ca;l Mattamy , men came and he open the insulation
    big crack shows from the top to the bottom in the basement close to my neighbors
    Mattamy intend to seal it from the inside
    is this correct/ I am afraid that this will appear again after winter
    what I should do
    in addition last year appear crack on the floor going from the corner on the side of the garage to the furnace it is about 120 long Mattamy men said that this is normal
    thank you

  • Tope A Says:
    September 4th, 2017 at 12:14 pm

    Pls I notice a vertical crack on the wall of my house. I want it repaired what can I do.

  • Kathie Kuehn Says:
    October 14th, 2016 at 1:50 am

    I live in Hacienda Hts., CA, and have noticed the home I rent a room in has cracks that are getting larger and the main beams in living room are buckling and are getting worse by the day. Should we be worried? And do other residents in my area have the same worries??

  • Rosita Herrera Says:
    December 22nd, 2012 at 5:48 am

    How can I find out about structural engineers? Thanks

  • Edwin Says:
    June 2nd, 2011 at 9:10 pm


    I bought my house in 2002 new. I notices in the front corner from the bottom the concrete is breaking away by pieces. I called home builder he reply that it was normal at the time. I started to notices more chucks are breaking away more. What should i do?. Thank you.

  • Jonathan @ Atlas Piers Says:
    October 12th, 2010 at 4:00 pm


    Great video. This is exactly what we tell homeowners every week in Georgia. You are right on the money – glad people are getting good information from your website.

    From a 20+ year old Foundation repair contractor in Georgia.

We want to hear from you! In addition to posting comments on articles and videos, you can also send your comments and questions to us on our contact page or at (800) 946-4420. While we can't answer them all, we may use your question on our Today's Homeowner radio or TV show, or online at

 characters available

How to Know if a Foundation Crack in Your Home Is Serious