Cutting back a concrete floor

[hillsider69]

I have a kitchen floor that is an insulated mass of c20 concrete about 300mm deep. I need to cut an area about 2m wide and 5m long down by 15-20mm. Any ideas please?

 

[r896neo]

you can get a machine that will plane a concrete floor but i have never used one personally. I hear they are a bitch to work with though.

 

[Deluks]

Concrete cutting floor saw from a decent hire shop.

 

[hillsider69]

Concrete cutting floor saw from a decent hire shop.

OK THANKS VERY MUCH

What I am trying to do is add an underfloor heating system as the concrete is insulated. The plan is either to cut the area down 15-20mm and use a steel max4therm unit or cut 50-60mm channels and insert normal ufh pex pipes and grout them in with fancy grout (yet to be determined!)
Both will be dusty and the worry about the normal pipe way is about the grout debonding from the slot walls due to expansion and contraction.
So any ideas about that

 

[Deluks]

Tricky job! Using a non-shrink structural grout would probably do it. Or just bed it in using a dry mortar/screed mix. If you are tiling on top then the tiles will bridge any slighty gappy or shrunken areas anyway.

 

[hillsider69]

Tricky job! Using a non-shrink structural grout would probably do it. Or just bed it in using a dry mortar/screed mix. If you are tiling on top then the tiles will bridge any slighty gappy or shrunken areas anyway.

Thanks.
That's a good point about the tiles, if they are fixed down with really strong glue it would be an added security. Not looking forward to the dust!

 

[Thermo]

if you are using a concrete saw then a wet one will keep down the dust. have someone on hand with an aquavac to suck up the water as you go and keep the water and mess down

 

[Deluks]

if they are fixed down with really strong glue

I'm sure you mean tile adhesive
Be sure to use a powdered flexible type.

 

[hillsider69]

if they are fixed down with really strong glue

I'm sure you mean tile adhesive
Be sure to use a powdered flexible type.

Yes I did, its also good for fixing coving up.