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Can anyone confirm the prep work prior to fitting Karndean Flooring to a concrete floor, please?
I believe I have to put down some floor leveling compound, then some kind of solution over this, prior to the adhesive.
Is this correct?

Thanks

Hi,

Yes you will need to put down a leelling compound prior to insulation for Karndean. If it is a new concrete floor, you need to prime the floor and then use a water based screed, eg Stopgap 300 or if it is an old floor with a bitumen glue, for example you will have to use a latex screed, eg Stopgap green bag and 114 liquid. You will also need a high temperature adhesive if fitting in a conservatory or a room with a lot of sunlight or underfloor heating, otherwise a pressure sensitive adhesive c an be used.

Hope this helps

Karndean specify that once a self smoothing compound has been layed, that you should then put a coat of feather finish, which is a compound from ardex, that takes out any trowel marks /dips or raises in the screed..
For karndean the floor should be as close to a sheet of glass as possible..

When we screed floors now we use a spiked aeration roller in the wet screed to create a power floated finsh..
The feather finish also gives a good surface to bond to with HT or pressure sensitive adhesive...

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