• How to Fix Small Cracks in Your Foundation


    Water is insidious and doesn’t need much space to get through and enter your basement where it causes multiple problems including mold, rot and damage to your prized possessions.
    There is also some evidence that suggests these cracks might give an opportunity for radon gas to enter your basement.
    Radon is a cancer causing radioative gas that has been found in homes all over the United States. It is caused by the natural breakdown of uranium in soil, rock and water and gets into the air we breath.
    The Surgeon General of the United States has warned that radon is the second most deadly cause of cancer in the US.
    So filling the cracks is very important for health reasons.
    Small cracks in the foundation can be repaired quite easily, and we’ll show you how in this home repair guide. Depending on the time and skills you have, these repairs can be DIY projects, especially for cracks less than 1/8th of an inch wide.
    The other option is to call a foundation repair company to repair small foundation cracks and those that are larger. A small crack can be fixed in less than an hour, and several can be filled in half a day. When the cracks aren’t numerous, filling them from inside your home will save you the expense of excavating the foundation and waterproofing it from the exterior which is a time consuming expansive business.
    It is certainly worth trying solve the problem first yourself.
    You should also see our “Guide to Waterproofing Your Basement” so you can keep some of this from even happening.

    Home Foundation Crack Repair Tips

    This home repair guide offers options for repairing small cracks in the foundation of your home.
    The factors affecting the job are discussed, so you’ll know what you might run into during the work. Foundation crack repair tips are included as well as the costs for the work whether you do it yourself or hire a professional. The guide concludes with resources from around the Web that provide you with additional information about the work and whether it’s a DIY home repair or one that has a need for a professional.

    This section outlines the work to provide you with a good overview of what’s involved.

    • Examine the walls and floors of your basement to identify cracks that are more than just surface cracks but are letting in water
    • Cracks that need to be filled should be lightly brushed with a wire brush to remove loose concrete
    • Crack repair DIY kits that use low-pressure filling are easy to use and deliver permanent crack repair solutions
    • The best products use either epoxy or polyurethane material engineered specifically for use when water is present
    • Polyurethane is cheaper and useful for non-structural cracks, though epoxy should be used for structural foundation cracks
    • When in doubt, use epoxy crack filler for a stronger bond. Once fully cured it will be stronger than the material it is bonding to
    • Allow the crack to dry for a few days, if possible, before applying the crack filler, but it isn’t essential
    • Follow the crack repair kit instructions carefully for best results
    • Most require inserting ports by drilling holes into the crack every 8 to 10 inches
    • It is then a good idea to clean the holes with either air or water to remove the cement dust
    • Polyurethane or epoxy crack filler is injected into the ports. If you work quickly the filler can also be spread with a trowel to fill any minor holes on the surface
    • Make sure the crack filler has hardened before placing objects on it
    • Small Foundation Crack Repair Costs

    If you’re using a DIY crack repair kit, they come in different sizes for filling 10 feet to 30 feet of linear crack. The average for a kit to fill 10 feet is about $140 for polyurethane and $245 for epoxy.

    If you decide to call a pro for the job, expect estimates of $30 to $40 per linear foot filled with polyurethane foam and $35 to $55 per linear foot when epoxy is used.
    The price will be higher if there is a lot of site preparation to do beforehand or if the cracks are large. Some contractors have minimum fees such as what it would cost for filling 10 feet.

    Saving Money on Foundation Small Crack Repair

    If you’re doing the work yourself, shop around for the lowest price for comparable kits. This is no time to go cheap; make sure the kit you use contains quality material, and look for a warranty. Ask for recommendations at your local hardware or home improvement store.

    When hiring a contractor, shop around for the best price by getting several estimates. Only consider contractors that offer a warranty of at least 5 years on the repairs.

    DIY Resources for Foundation Crack Repair

    A-1 Basements – This local contractor provides an overview of how to fill various types of foundation cracks.

    Aquaguard Waterproofing – The differences between structural and non-structural cracks are discussed on this page from a Baltimore foundation company.

    Elite on Concrete Restorations – A local contractor gives you an overview of your options for repairing cracks and other foundation issues.


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