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What Are The Types of Foundation Cracks?


Hi, my name is Bart Schneider, and I’m a project
manager for United Structural Systems. We often get asked by homeowners about the different
types of cracks that we see. Here are some of the different cracks we see and what they
mean. Hairline cracks are usually not something
to be concerned about. However, they should be monitored closely for changes. If you see
any changes, or if they grow larger over time, you should consult a professional and have
them evaluate it. Concrete floors in your basement or garage may from time to time develop
small hairline cracks. Because they floors are not the actual foundation of your home,
there’s typically little reason to be concerned. If, however, you do see cracks in the block
or brick in these areas, it may be an indication of a larger problem. Stair-step cracks through the mortar joints
or through the brick itself may be a bigger cause for concern. Especially if the wall
is bulging or if the cracks are greater than a quarter of an inch. Look for separation
around windows and doors. If the brick is pulling away from the window frame, that’s
a sure sign of foundation movement. Stair-step cracks are considered the classic sign of
settlement. If you notice stair-step cracks in your brick or block, consult with a professional
right away. Vertical cracks are common in both new construction
as well as older homes. While vertical cracks seldom denote a true structural problem, they
can allow water to enter your home. Horizontal cracks in your basement wall are
potentially the most serious of all. Hydrostatic pressure is at work here, causing the walls
to bow inward. If you notice horizontal cracks in your basement wall, you should contact
a foundation repair contractor immediately to evaluate the integrity of your home. We’re happy to talk with you to answer any
questions you may have about foundation repair. If you’re concerned about cracks in the brick
of block of your home, call USS for a free estimate. We guarantee our best, call USS.

9 thoughts on “What Are The Types of Foundation Cracks?

  1. The advantage of reinforced concrete adding Harex mill cut steel fiber comparing with normal concrete shown as following.
    1. Cracking resistance increased 3-4 times (Impact load)
    2. Compressive strength increased 5-20%
    3. Tensile strength increased 20-40%
    4. Wearing resistance increased 40%
    5. Bending strength increased 20-50%
    6. Leakage proof

  2. I fixed my foundation and put 33 peers around my home. The person mentioned to me that he went above the pressure recommended by the standards because he has many years of experience in foundation repair and told me it was okay. One year went by and I see in the middle of my home some of the concrete lifting up in two spots. Yesterday I use a pan to pick-up the pieces and threw them in the trash. I now have two small holes in the middle of my bare concrete slab inside my home. My reasoning for this to have happened is that the pressure of the peers on the edge of my home has put pressure on the middle of the concrete slab of my home- causing it to break away. Am I right to think this way? I haven't found any information on why the concrete slab inside my home would chip away. The best answer (Other than my explanation) was that that area could've had weak spots. On the bottom of the broken concrete pieces I found a white substance. Someone mentioned to me it is called efflorescence which is caused by moisture evaporizing in that area leaving salt residue behind. (Any clues of what it can be that's causing the chipping away of the concrete?

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