I need to lay a laminate floor on unevern flagstones - any ideas how i would go about this - I was thinking of putting down 18mm exterior ply onto battens and laying the laminate on top - what does everyone think, and what size battens would you use?
thanks

If the floor thickness is an issue you could use a self leveling compound, may need two applications if there is a lot of variation, then use the standard underlay.

Jason

Asphalt?    Keeps out damp


Another option is 25mm Jablite or similar polystyrene sheet with a floating layer of t&g chipboard on top(joints glued and with a vapour barrier underneath the t&g)   will give you a nice warm floor.

Depends how "uneven" the floor is.

Gromit I am not so sure, I have always laid t&g on top.

I think that it may not support the laminate enough especially if there was a particularly heavy point load.