Levelling mixture of wooden and concrete floor

[Ren Hoek]

I've just moved into a house that has been extended on the ground floor. The lounge is mainly original wooden floorboards, with the extension floor being concrete.

There is a really obvious lumpy join between the 2 sections that shows through the carpet. There are also noticeable ripples in the carpet over the wooden section caused by the gaps between the boards so I was thinking of 3mm hardboarding the lot before having a new carpet laid.

Hardboarding the wooden floor seems simple enough, but how would I continue this over the concrete section? The difference in height between the 2 sections is already about 3mm, so I would be looking to screed up to that height and then boarding over.

Any ideas?

Cheers, Bod.

[The Natural Philosopher]

'self levelling' compound. It isn't of course, but you can make it smooth and level with a float and a level.

[Ren Hoek]

Thanks for the reply.

Are you suggesting that I hardboard up to the concrete section, then use the self-levelling compound?