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If you find sections of concrete pushed upwards, this is when you have a major issue. A new house will normally finish settling within 24 months and if you fill the sunken concrete prior to the house finishing you may find yourself repeating the process as the filled section begins to sink as well. If you can hold off on the repair, we suggest you do. Repairing sunken sections of concrete in your basement is a fairly easy process, as all you need to do is pour self-leveling cement (available at most home repair centers) over the lowered section. Even though sunken concrete is more severe than the cracks noted above, it is still not a cause for alarm. Settling of the soil beneath the house causes the concrete to fall under the pressure of its own weight. If the contractor didn’t sufficiently compact the ground below your basement floor you may experience patches of sunken concrete. These cracks should be sealed using the same method as the hairline cracks to ensure moisture does not seep through in the future. Just like the hairline crack these do not represent any structural issues to your house. The shrinking concrete can lead to cracks ranging in 1/8” wide or bigger. You can seal these cracks yourself by using an elastomeric caulking sealant made for use on interior concrete surfaces (available at your local home improvement store). However, sealing these cracks even further reduces the risk of moisture seeping in.
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Many professionals advise that these types of hairline cracks are just superficial and do not require repairs as there is a slim chance of them expanding further or for moisture to seep through. You will begin to notice hairline cracks within 12 months of the basement floor being poured. These cracks generally occur due to surface shrinkage as the concrete dries. A spider web crack versus a straight hairline crack makes it no more dangerous. The most common cracks found in your basement slab are the hairline cracks the shape or pattern of the crack is irrelevant. Let’s be clear no matter of the reason the crack appeared you should always seal the damaged area even if it is just considered preventative maintenance.
CONCRETE SLAB CRACK REPAIR SEALANT PROFESSIONAL
We will outline the different types of cracks below ranging from cosmetic damage that you can repair yourself to the rare occasion where the damage is pointing to a much larger issue where we suggest you seek professional basement waterproofing services. Chances are the cracks are not an indication of a bigger problem as the basement floor does not hold the weight of the house, your foundation walls do all the heavy lifting. There are several reasons why your basement concrete slab will crack. Are you startled at the sight of cracks in your basement floor? You’re probably asking yourself “ What do cracks in my basement wall mean?”