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Old 2007-09-13, 10:53 PM
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canabiz canabiz is offline
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Default Hairline crack on basement floor

Hello folks, i saw a hairline crack on the basement floor of my house earlier tonight and I would like to know if this is normal, for new houses anyway, as a result of shrinkage/settlement

The crack is about 6 feet long, weaving its way from beneath the laundry sink to the centre of the basement, near the drain hole. It's tiny, you have to pay attention to see

I have searched previous threads on this topic and from Google and it seems like it's normal and builders won't probably fix it unless there's water leaking.

I will let the Richcraft inspector know about this when he comes in next week for the 30-day inspection
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Old 2007-09-13, 11:18 PM
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Yes it's normal and to be expected.
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Old 2007-09-14, 12:16 PM
north59 north59 is offline
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I have one that can fit the width of a dime, the other is hairline. These are to be expected. My house is 6 months old now. Before I finish my basement I will patch the cracks. If water comes in through the cracks then its time to worry.
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Old 2007-09-14, 03:11 PM
thepdiguy thepdiguy is offline
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Cracks in the basement floor under 6mm ( about 1/4 inch) or under are not considered warrantable. They are common and due to shrinkage.
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Old 2007-09-16, 12:55 AM
aikejon aikejon is offline
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Builders may consider 1/4" normal, but no way would I...nor would any potential future house buyer. Just think if you were looking at houses to buy, and you saw a 1/4" gash running across the basement floor...I'd walk away quickly. I'd patch it up and sell quickly if that was in my basement. Hairlines... no problem. Dime-width, I'd be concerned if it wasn't stable over time but not at all otherwise.

1/4" would mean to me that the foundation or floor was poured with improper site preparation (or poorly formulated concrete) or that there was potential subsidence - I'm not saying I'm a building engineer, just that those two possiblities would be running through my mind.
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Old 2011-05-08, 08:48 PM
newfdog newfdog is offline
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quite common to see 1/4 inch.fill it with a good filler and use a 1 inch putty knife to smooth and push in in,don,t be stingy on it,your floor will be fine.did a thousand of em.
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Old 2011-05-13, 11:10 AM
nessiesens nessiesens is offline
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The size amount is unfortunate, my entire basement has cracks that join up, there's about 4 of them, they all meet at one spot, but they aren't that wide across, we're just going to patch it up but keep an eye on any cracks, in case they expand
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