Self Levelling Over Bitumen Dpm In 1950 House

[Jayeno]

Hi guys I'm a first time house buyer, and I am trying to level a floor to tile. The hardcore underneath the bitumen is old sham and sand from a nearby by Pitt. Then on top of that concrete and a bitumen dpm of around 10-15mm.

Problem is over the years when shale or sand absorbs moisture it has swelled causing lumps around 5 mm high on the floor.

I have contacted various companies but the never reply.and from what info I have gathered I am not sure a laytex or fibouroud self leveller will do.

Sorry for ling post any help would be great thank you

Jay

 

[Spud]

You may need to screed it but it will be a 40mm build up

 

[Jayeno]

Thanks Gary, is there no self leveller Available that could do the job? Why does it have to come up by so much?

 

[Dan]

It needs a good base so you need to either get it up and stick a good screed in to make it solid. Or stick a good screed on top.

Your floor isn't solid at all.