Cracks in basement floor

Old 10-19-04, 11:31 AM
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Cracks in basement floor

I have cracks in my basement floor that seem to be lifting and or separating. I can tell this by the fact that some of the vinyl flooring I have down is cracking. My house is over 40 years old, so one would think that it would be done settling. It seems like this could be a major problem. My question is how major, and what other structural damage could be occurring to cause this or is the cause of this.

Old 10-19-04, 03:30 PM
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Basement floor cracks

Your basement slab cracking may be due to water pressure from underneath the concrete. Water can exert force that can do this type of damage - and a whole lot worse - if it is trapped under a slab. Water can wash out and settle the base material so it leaves the slab suspended in the air. The force of gravity will eventually pull the concrete down and create cracks in the slab. We have had a lot of rain this year. Make sure gutters and downspouts are clear and are carrying water away from foundation. Do not use splash guards as they do not carry water far enough from foundation. Inspect landscape. Make sure soil slopes away from foundation to carry away excess water.
Old 11-26-04, 10:51 PM
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Age of the home really doesnt mean your house has stopped settling. I've completed jobs on structures that were less than 1 month old, to 150 years old.

Changes in moisture content can affect the volume of the soil. This can cause the rising and falling level of the floor you notice. The volume change as the moisture content changes.

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