Underlay options for LVT (Rigid Core Click System)

I'm replacing carpet on my hallway and glue down vinyl on my kitchen with rigid core LVT which is 5mm thick (says suitable for commercial application on the site, not sure how true)


Floorboards are regular wood floorboards which I assume won't be dead level when I take the carpet/vinyl off.

So what are my options for levelling the floor when it comes to Solid core LVT?

Will any of these be suitable? will they be too spongy for rigid LVT?

1.Fibre boards

Diall Wood Fibre Underlay Boards 7m² 15 Pack | Underlay | Screwfix.com



2.

Premier Wood & Laminate Flooring Underlay 3mm 10m² | Underlay | Screwfix.com


Or does it have to be hardboard sheets which I'm trying to avoid.

Thanks

Any use any of them. It needs to be a thin underlay. Most click underlays are 1.5mm

dazlight said:

Any use any of them. It needs to be a thin underlay. Most click underlays are 1.5mm

Click to expand...

Thanks those above are 5mm and 3mm so guess not suitable?


do you mean a thin foam underlay such as below? 2mm thick



Diall Acoustic Polyolefin Foam Underlay 20m² | Underlay | Screwfix.com

Like them. The 2mm foam is no good.

you might have to plywood over your floorboards 1st though