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What is causing sagging floor?

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Posted by: from Montreal
8/5/2014 at 5:43:39 PM

There are two spots in my 50 year old house. The kitchen floor is sagging badly. I think it was because of the heavy appliances in the kitchen (a 60kg fridge + a electrical range). The basement is unfinished and a couple of joists looks twisted under the kitchen floor (a bit, or there would not be a kitchen any more...).

The other area is the small bedroom in the 2nd floor. The floor sinks a bit near it's door so the door cannot be fully closed right now.

I had someone check the foundation last year (was fine) so my guess is that it has something to do with wooden structure. Maybe some joist needs to be jacked up?

Approximately how much would it cost to have them inspected and fixed?

Thanks

REPLIES (3)
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Date/Time8/5/2014 at 7:53:17 PM

Bracing the floor is job one. It depends on the length of support joists required and length of time. Typically 5000-12000.00. It really depends on moisture content and other construction variables.

Thanks,

Jeff

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Tailored Construction in Montreal
Date/Time8/7/2014 at 3:16:48 PM

Good Afternoon Li

1-Twisted joists: it is very important that there are blocking between the joists. These blockings run perpendicular between the joists which prevent the joist from twisting.

2-Sinking floor: the best bet is to schedule an appointment with a structural engineer. He/She would be able to tell you about the movement of the house.

Hope this helps!

Roberto

Building inspector / Consultant

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Date/Time8/8/2014 at 10:15:57 PM

Any kind of sagging is likely lack of structural support. Either something has settled or it was simply built incorrectly. My recommendation is to call a structural or civil engineer to do an inspection.

Bonne chance.

Rick

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