Laminate floor on concrete+joists

[sammoseley]

Hi,
sorry if this has been answered before, I did do a bit of searching but couldn't find it. I suspect it may have been as it's probably a fairly common one.
Got a knocked through lounge / extension, half of it is new screed (DPM'd), other half is joists with ground about 3 foot underneath. I was going to put ether ply or chipboard on the joists to the level of the screed, then underlay and laminate. Wondered if thats the right way to do it and if so am I better with ply or chipboard or something else.
any advice much appreciated,
cheers
Sam

 

[WoodYouLike]

Ply is always better - you'll have to use at least 18mm thick and opt for exterior grade.
As for your other matter, read this: Create one type of underfloor - if needed!

 

[sammoseley]

thats great,cheers