Options for raising the height of a concrete floor

[Mad_Doctor_X]

Hello!

I have pulled up the floor of our extension, this consisted of a chipboard floor floating on battens that were resting on bits of DPC on top of a concrete base. The floor was contiguous with our existing suspended timber floor, but with no ventilation so all the wooden stuff was just skipped. After a bit of exploration the concrete floor has a DPC and seems in reasonable nick.

I would like to raise the floor to the height of the rest of the floor and am wondering what my options were? I only have to make up 50 to 40 mm in height. Can I lay a concrete screed on top of the existing concrete or do I need a least 65 mm to get a reliable surface?
I noticed the celotex guidelines for upgrading a concrete slab floor and they suggest that I could level out the concrete with a latex compound, lay insulation on top and then put chipboard on top of this?

Any hints would be much appreciated.

 

[pinenot]

Are you wanting to put insulation on the floor?

 

[dazlight]

You could use f.ball base to build it up that's goes up to 50mm. Easy to use too

 

[Mad_Doctor_X]

Are you wanting to put insulation on the floor?

The celotex guidelines seemed to suggest this was ok, but it seemed a little odd to me to put chipboard on top of the insulation board. Most of the installation methods for insulation board have it buried under the slab, or at least under a screed.

 

[pinenot]

This is what I found on the Wickes site -

Question
Can i use 18mm chipboard flooring on top of 100mm of celotex?
I've converting my garage into a studio, am looking to lay a damp proof membrane onto the concrete floor, then 100mm of celotex. Would 18mm of chipboard be ok to lay straight on top of that?
Asked 1 year, 7 months ago By Spanner06 on T & G Chipboard Flooring 18x600x2400mm


Answers
Yes. These boards are suitable when supported on 450mm centres, so sitting on a bed of celotex would be fine. it should be glued with a woodworking adhesive.
Top 1000 Contributor
Answered 1 year, 6 months ago By neverending - Weston-super-Mare

...go figure...pinenot