Our floor has a fall of up to 30mm from highest to lowest. Worst point is 10mm across a door way. I have a 4t bottle jack, TP sleeper as a base support. My plan was to remove the tie, between bearer and stump, jack up the bearer and use FC sheeting to pack up the low points, then tie back to stump. Where the fall is in joist direction I'll lift the joist and pack between bearer and joist.

Does it matter if I'm packing bewteen bearer and stump or between bearer and joist?

Is FC sheeting ok or should I use nylon packers?

First time I've done this so any advice welcomed


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