WheelchairDriver

I'm trying to figure out how to cut a concrete slab really close to a wall bottom plate. I want to cut around the perimeter of a bathroom floor to tear out the floor for a new pour/slope for a curbless shower. I don't want to accidentally jack hammer out under the wall so I need to separate the concrete first. A circular saw doesn't get close enough though. Any suggestions on the right tool for the job? The current slab is about 3in thick.

Only way is a disk cutter. Or if you like dust an angle grinder. Cut a groove. Hit with hammer and it will break in the right place.

Yes I see they make a 9in angle grinder. That paired with a diamond cutting wheel might do the trick. Thanks.

You will only need a 1/2 inch cut to make it break when hit. Unless someone added rebar!

There's rebar and I am going to get the 9in cutting wheel because I can only utilize less than half of it for cutting. I can't have a fracture under the wall for sure.

This is the plan. Single slope, linear drain wet room. At one time it was a tiny bathroom with an enclosed shower and barely enough room to walk in. I had it gutted and now we're removing the concrete and rearranging the toilet drain. I'm trying to keep it open and simple.

A picture is worth a thousand words...

Hes making a wet room that drains dow to one end.

I've heard that it's common in Asian countries to have a toilet in the shower. However, in the US plumbers look at you like you're crazy. I talked with several and it took over a year to find one that would take the job.

TOILET is all ceramic and so totally water proof. As long as you use stainless screws it wont much care. Remember I was a plumber! Did many bathrooms. Never took up a concrete floor as you describe though. All our homes are brick built on foundations of concrete. Even internal walls. Floors are just poured in later. They dont go under any walls. So chopping one up just means a big hammer.

Burgerman wrote:TOILET is all ceramic and so totally water proof. As long as you use stainless screws it wont much care.

I think it's just uncommon here and a lot of the plumbers just wanted to install a fast food "ADA" shower insert and move on. It's getting harder to find good tradesmen.

Burgerman wrote: Floors are just poured in later. They dont go under any walls. So chopping one up just means a big hammer.

That would make what I'm doing much easier, but it's a solid pour under the whole house. My bathroom is pretty small. I gave that bathroom layout to all the plumbers, but it makes the space look a lot larger.

Rye wrote:I think it's just uncommon here and a lot of the plumbers just wanted to install a fast food "ADA" shower insert and move on. It's getting harder to find good tradesmen.

It is the same all over the West.
The logical consequence of printing currency.

I think they dont want to do it because its a b*****d of a job. Blood and bullits.

You will need concrete cutting disks and some water or you will make a cloud of disk and concrete dust! And use a million disks.

These last 50x longer.
https://www.amazon.co.uk/PRODIAMANT-Dia ... B07H4WC3S5