Advice on solid wood flooring laying

1 Mar 2010
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United Kingdom
Hi - Grateful for a bit of advice, not on the actual laying, but what surface to actually start with.

I want to lay some solid wood flooring downstairs. The current floor surface is made up as follows:

- concrete floor
- Plastic sheet DPC
- Polystyrene insulation board about 3-4 cm thick
- Chipboard floor
- Underlay
- carpet

My question relates to which surface I should be stripping back to.

Bearing in mind the solid wood flooring that I will lay would be either 14 or 18 mm thick, plus will require its own underlay board (for insulation and sound deadening).

On this basis should I take up and remove the existing chipboard floor and lay the underlay board and wood floor on top of the existing polystyrene? Or should I be laying it onto the existing chipboard?

The trouble with that approach is the additional height that will add to the floor probably 4-5 cm, which is a lot and would obviousley require doors being cut and also creating steps where it meets other rooms.

Many Thanks!

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