Antony higo

Height of roof is 83". Going up isn't an option really. How deep would you recommend Russell? Would I have any issues regarding the foundations?

It's not a closed in cellar with only one exit. Our back door opens into our back garden (house is basically 3 floors). Entry/exit through kitchen too.

Just seeing that there are different types of hardcore. Any idea which kind is suitable for this job. Thanks.

The room will have a radiator in. It's just going to be used as a play room for the kids. Might be a silly question but what is Jablite?

I've seen something (on YouTube) about putting insulation in. Is it just normal kingspan insulation board you use or special stuff? I would have thought kingspan would crack under the weight of the concrete. Or just soak into it. Are you saying if I use this I can just put it over the hardcore then put the membrane on top? That does sound like an easier option. Thanks.

Hi all. I'm having a new concrete floor put in my cellar. The house is pretty old (1917). I'll be getting a local builder to do the main concreting work but wanted to do most of the prep. work myself to save money. I'll be digging it out. Putting hardcore, sand and a membrane down. My questions are how far down do I dig? Was thinking 8/9 inches. How many inches of hardcore? How many inches of sand? And where do I put the membrane (under hardcore, under sand or on top of sand)? I know next to nothing about stuff like this so any help is much appreciated, cheers.