Planning subfloor work

<div>Hi all, I'm planning on ripping up my tiles and flooring to do some sub floor work and putting down new flooring and I'm after some advice. I'm in Wantirna (VIC), brick veneer, tile roof, concrete stumps, hardwood frame, built in the late 70's.

I have some old termite damage in a bearer (that's now squashed) that I'm going to replace. I also have an area that the joists (2x4) are spanning over 2.1m. Which is resulting in bounce in the kitchen, so I'm planning a row of stumps and a new bearer. I have bugger all room under there so I'm planning doing this with the floor up.

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