Wooden Floors across different subfloors

[sg]

The subject of laying wooden floors has appeared numerous times in he group with some excellent advice.

Please help......

We would like to install solid oak floor in our kitchen / diner that has just been knocked through. The dining room is the original (1900's) wooden board subfloor. The kitchen subfloor is 80% (5m Sq) concrete and 20% (1.25 m Sq) wooden board.

I have been advised not to glue across different subfloors and will therefore attempt to nail or float. I have been advised to lay 18mm ply across the entire floor.

However, despite trying to level the concrete floor once already, it is still in a bad way, I have variations of up to 5/6mm (it is better than it was!!). I dont think this is level enough if covered with ply for either float or nail! Can I get round the variation by laying battens and pack out the hollows? Is 15mm (suggested in another post) batons thick enough to nail? Junckers technical info suggest a minimum of 38mm plus packing - this is too high!! Is this something I can do myself! I am running over budget and cannot afford to pay for the installation.

Finally.... do I need underlay? Beneath battens or play (if I manage to level the concrete enough) If so what type?

Any help appreciated

Many thanks

Simon

[Christian McArdle]

Have you tried self levelling compound? If so, did you realise that it doesn't actually self level and you need to give it a helping hand?

Christian.

[Huge]

"It's supposed to be automatic, but actually you have to press this button."

(John Brunner, "Stand on Zanzibar")

[Owain]

"Huge" wrote | "Christian McArdle" writes: | >Have you tried self levelling compound? If so, did you realise that | >it doesn't actually self level and you need to give it a helping hand? | "It's supposed to be automatic, but actually you have to press this button." | (John Brunner, "Stand on Zanzibar")

If this washing machine is automatic, why are my dirty clothes still on the bedroom floor?

Owain