Floor replacement options - floorboards or chipboard?

[kent_phil]

I'm in the process of renovating a downstairs bedroom which has a suspended wooden floor.

Having taken up the old wooden floor, the base underneath is in a very ropey state - it is currently chipboard that has been down for many, many years and cut-up and parts hacked out and replaced over that time (some replacements with floorboards).

Additionally there is no insulation underneath so it's the right time to sort that out by putting some Kingspan between the joists.

What are peoples experiences and recommendations between replacing the existing chipboard with new chipboard, or spending 3x more on putting down t&g floorboards?

Covering going over the top is likely to be carpet.

Thanks is advance, Phil

[J6542]

Nothing wrong with 22mm chipboard. Glued and screwed it’s solid.

[Pheo]

Chipboard will take FAR FAR less time, and as above, done well, it'll be very solid (moreso than floorboards). Disadvantage as noted getting under it but hopefully you won't need to do that?

[kent_phil]

Thanks both - chipboard it is...

[Pitre]

OSB is a good option too.

[amusingduck]

I replaced some chipboard flooring recently as my first foray into DIY, Wickes was the only place I could find which had reasonable delivery terms. 7-odd quid if the order is below £75ish, free above that. Everywhere else seemed to want £40-50 delivery or free if spending £300 (which I wasn't).

I used D4 glue on the joists/T&G and these Spax screws https://www.screwfix.com/p/spax-tx-countersunk-sel...

It was pretty straightforward, just plan ahead. Stagger the boards, and ensure the ends land on a joist. Lay the boards perpendicular to the direction of the joists.

Apologies if I'm teaching you to suck eggs