What suspended subfloor decking to choose?

[Plumsnson]

Hi all I've lifted a lot of pine floorboards and there is a bit too much damage to tongues and ends (some rotten ends) to put them back.

I lifted it to address bounce (wedges missing on sleeper wall).

I'm insulating between joists with breather membrane + rockwool, then need to choose subfloor decking.

Are chipboard or similar panels good? T&G? Can I avoid lots of noggins?

I do want to stiffen the floor frame with some herringbone braces while down there.

 

I'm planning UFH on top so expecting to add some rigid foam on top.

 

 

Also - any advice keeping wedges on the sleeper wall in place forever? It's an uneven brick sleeper with felt DPM and the gaps on some large up to 30mm. I was gonna tap in pairs of hardwood wedges just don't want them to vibrate back out!! Do I wood glue them to the joist, drive a little nail in?

 

Thanks!