Springy floors upstairs!

callmechar

Our floors upstairs move when walked on. House is 1960s ex council house. We have looked and can see the joists move somewhat where they sit on the wall where they end. The main problem is the 2 largest bedrooms where the span is 3m. The joists are approx 2 x 6/7" and are spaced quit far apart. We do intend at some point on redoing the living room ceiling (which is directly below the biggest bedroom) and we will be tearing down the ceiling and putting new plaster board up in the living rm. This will give us a good opportunity to be able to try to resolve the problem. What is the best way to fix this?

Please help! Thanks in advance

tony6403

I would get a couple of acrow props and a length of ,say , 3"x3" timber and jack up several joists or all of them together ( rather than doing one at a time and trying to keep them aligned individually) and tightly pack them underneath with pieces of natural slate.

callmechar

Thanks. Anyone else?

southcoastrgi

Maximum Span of Floor Joists at 400 C/C – C16 Grade

47 x 97
Max Span of 1.93M
47 x 120
Max Span of 2.52M
47 x 145
Max Span of 3.04M
47 x 170
Max Span of 3.55M
47 x 195
Max Span of 4.07M
47 x 220
Max Span of 4.58M

southcoastrgi

that's based on 400mm centres if they are further apart the span decreases, are you sure a wall hasn't been removed downstairs ?

callmechar

No, no wall has been removed downstairs under the bedroom (in the lounge). The noise is driving me insane - you can hear the joists move downstairs

Nada666

Move the bedrooms downstairs and put the lounge upstairs. Dining kitchen can remain below.

(Yes, yes, I know. Not very helpful to you - but a serious option if just moving into a new place and haven't started.)