Sand & Cement wet room floor screed questions

[On one]

Hi All.
Got to admit, having to use S&C to form a wet room floor is a first for me. I Got a call out of the blue from a builder who I have never come across ,quite a few other things setting off alarm bells....... Painter already in an adjoining room,waste pipes at a jaunty angle,promises of we will do this,we will do that.......
but what is the minimum thickness of sand and cement required and how long would this take to dry? Just what to be sure of my facts when I ring him up.

 

[White Room]

What are screeding onto.....

 

[On one]

Sorry!. A concrete floor.

 

[White Room]

You can take screed down to 30mm if needed but usually 50mm on concrete base with a few fibres thrown in for good measure and a slurry with sbr onto the base will insure a good grip.

 

[On one]

I reckon,I have a maximum of 45mm at the doors but less at the drain.

 

[White Room]

I think the falls to the drain is 20mm in a linear metre if memory serves me right....

 

[On one]

Re: Sand & Cement wet room floor screed questions

I think the falls to the drain is 20mm in a linear metre if memory serves me right....

Which is not too far off being achievable. But the drying times?

- - - Updated - - -

The builder reckons 2-3 days!!!! lol

 

[White Room]

Re: Sand & Cement wet room floor screed questions

Which is not too far off being achievable. But the drying times?

- - - Updated - - -

The builder reckons 2-3 days!!!! lol

He can wish.....BS state about a day per 1mm or at least give it couple of weeks....or 4.

 

[The Legend; Phil Hobson RIP]

Hi All.
Got to admit, having to use S&C to form a wet room floor is a first for me. I Got a call out of the blue from a builder who I have never come across ,quite a few other things setting off alarm bells....... Painter already in an adjoining room,waste pipes at a jaunty angle,promises of we will do this,we will do that.......
but what is the minimum thickness of sand and cement required and how long would this take to dry? Just what to be sure of my facts when I ring him up.

I think min for sand and cement screed is 40mm/50mm but that could be reduced to suit falls with modern technology.

I think a tanking system before the screed might be a way to go.

I will wait for Ajax to respond, he has never let me down with his advice, so I will bow to Alan's experience.

Good luck.

 

[On one]

Re: Sand & Cement wet room floor screed questions

He can wish.....BS state about a day per 1mm or at least give it couple of weeks....or 4.

That's the formula I would use on a concrete,but wondered if S&C was different.