Help!! My Floor is sagging!!

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  #1  
Old 03-17-09, 02:42 PM
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Help!! My Floor is sagging!!

I moved into an older home that had been renovated by the previous homeowner and by all accounts he did a very good job, but... of course there is always a but, my upstairs floor is sagging because of the fireplace. I am not a handy guy by any means and I am worried that if I put a post or jack and attempt to lift the floor back into place it would cause alot more problems. You see the fireplace is built on the upstairs floor without any kind of load bearing wall or any other support in basement. (Is this common practice?) The tile is not cracking around the foundation of the fireplace yet, but the sag in the floor seems to be getting worse! (Any idea on allowable limits for sag over a given span?) Any thoughts or ideas would be very appreciated.

Thanks,

Rod
 
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Old 03-17-09, 02:56 PM
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Welcome to the forums! You use the term "upstairs". I take it that it is a 2 story dwelling? Or is it a basement with a main floor on which the fireplace is positioned? If it is a basement with main floor, don't hesitate to pour footings under the fireplace and install joist spanning lumber and lift posts. There definitely should be support under the fireplace. Otherwise, the excessive weight of the brick, rock, framing, etc. will cause undue force on the flooring an cause sagging joists. If you choose to use the adjustable lally column posts, make your adjustments slowly in order to keep the cracking to a minimum.
 
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Old 03-17-09, 03:17 PM
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Thanks for the warm welcome! My house is a bungalow with the fireplace on the main level over a developed basement. I guess the next predicament would be that because the basement is a wood foundation I would have to cut through the foundation to pour a cement footing to allow for support for even a lally post? Is my thinking correct on this?

Rod
 
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