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Old 04-14-2011, 09:12 PM   #1
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Why fill the basement back in with dirt?


2 lots down from mine, they started another house. But they're building it differently than mine was built. They dug the hole, built a cynder block foundation (as opposed to poured walls). Foam boarded all the walls. Then filled it back in with dirt. Why would they fill it back in?

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Old 04-14-2011, 09:33 PM   #2
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Why fill the basement back in with dirt?


They backfill the wall to provide increased support to the foundation. This prevents the wall from buckling towards the inside of the footprint of the house.

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Old 04-14-2011, 09:57 PM   #3
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Why fill the basement back in with dirt?


So they'll dig it back out?
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Old 04-15-2011, 07:06 AM   #4
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Why fill the basement back in with dirt?


Maybe there's no basement in this house. Doesn't make sense(to me) to fill in the hole to redig it out. If the builder was concerned about pressure, he would have capped the foundation with the first floor framing platform to stabilize the foundation.
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Old 04-15-2011, 07:20 AM   #5
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Why fill the basement back in with dirt?


Sounds like a bad plan. A house without a basement will have trouble selling. If they went all the trouble to make a foundation they may as well do it right. I'm suspecting they lazied out and did not put any drainage so if they kept the basement it would always have water issues. IMO best to just do it right while they're at that step. Easier now then after.
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Old 04-15-2011, 07:29 AM   #6
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Why fill the basement back in with dirt?


............go down the street and ask 'em.......
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Old 04-15-2011, 07:36 AM   #7
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Why fill the basement back in with dirt?


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............go down the street and ask 'em.......
Why do we so often overlook the simplest answers?
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Old 04-15-2011, 08:12 AM   #8
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Why fill the basement back in with dirt?


I've got two neighbors who filled in the basement before the house was built.

Both houses are within 300 feet of the river----both flooded after the footings were put in--High water table.
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Old 04-15-2011, 08:26 AM   #9
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Why fill the basement back in with dirt?


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Originally Posted by nateshirk View Post
2 lots down from mine, they started another house. But they're building it differently than mine was built. They dug the hole, built a cynder block foundation (as opposed to poured walls). Foam boarded all the walls. Then filled it back in with dirt. Why would they fill it back in?
did they pour a floor inside of the walls though? If not, it may have simply been that they felt they had to go that deep to build a proper foundation and the house was designed for a crawlspace type foundation.

If they poured a floor, I have no explanation for what they did. You would never want to do that. You would have to have a means for the crawlspace to drain.
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Old 04-15-2011, 11:40 AM   #10
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Why fill the basement back in with dirt?


It's CHEAPER.
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Old 04-15-2011, 11:57 AM   #11
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Why fill the basement back in with dirt?


With bad surface soil or high water levels it is possible to see a "double" foundation built. The first half is built to put in the strip footings and build the block walls to the right height and then fill with concrete sand (definitely not "dirt")and build the "upper" foundation that will be seen and the floor of that is poured after the utilities are plumbed. The house is just built on top of the second "foundation".

Block is use because they do not know in advance what the real height of the lower foundation is because general soil borings do not always provide the accurate information that is gotten during excavation and the height and steps can be adusted easily. Makes no sense to go deeper than necessary.

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Old 04-15-2011, 10:21 PM   #12
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Why fill the basement back in with dirt?


Can't just "ask em'". I have a job. When I get home, they're already done for the day.

They now stoned over the dirt and pipes protrude out of the stone, so I can only assume they're not going to have a basement. Seems weird In my area though.

And I'm nowhere near water.
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Old 04-15-2011, 10:49 PM   #13
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Why fill the basement back in with dirt?


Could it be a garage where they need the support for weight? Seems odd that they would dig it all out and then fill it. Usually they would only dig the trenches for the foundation.
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Old 04-16-2011, 07:09 AM   #14
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Why fill the basement back in with dirt?


Are you sure they didn't just leave the center "hump" in place and dig the trenches out?

How tall are the walls, 4', 8'?
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Old 04-16-2011, 01:04 PM   #15
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Why fill the basement back in with dirt?


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Originally Posted by oh'mike View Post
I've got two neighbors who filled in the basement before the house was built.

Both houses are within 300 feet of the river----both flooded after the footings were put in--High water table.
Does the complete house have but a crawl space under it or is there a full basement with the entire house raised over it?

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