Forming falls into wet room drain.

[On one]

What is the best way to form the falls on flat concrete floor in a wet room?
I had thought of trying to form the falls with adhesive,but this could be tricky trying to reach the far corners of the room over wet adhesive.
Is laying a preformed Wedi type shower former realistic/feasible considering the already cast in situ position of the drain?
Your thoughts Ladies and Gentlemen......

 

[nybor62]

any pics would help, usually the drain would be at a height form the floor so you could screed the floor with sand and cement ,creating falls to the drain

 

[On one]

This job is a new build and the whole house floor slab(with UFH)is completely flat and in 1 pour without any expansion joints!
Using sand and cement would create a very large step into the wet room I'm afraid. Even using adh or a preformed tray will create a step,but not as large.

 

[mz30]

The only way to do it right would to cut out the concrete ,adjust the drain and fit the former,lot of work I know.

 

[Spare Tool]

That's how I'd do it and have done several wetrooms like this....2x1" wood cut with falls in, rapidset inbetween wood, thin slc then tile

 

[Diggy]

This job is a new build and the whole house floor slab(with UFH)is completely flat and in 1 pour without any expansion joints!
Using sand and cement would create a very large step into the wet room I'm afraid. Even using adh or a preformed tray will create a step,but not as large.

In other words the walk in shower was an after thought ?

I'd do it with S&C myself which would create a step but then the architect should have thought of that tbh.
I wouldn't risk going down some thinner route for fear of break up.

Sounds like tray or step to me.

Diggy

 

[Spare Tool]

In other words the walk in shower was an after thought ?

I'd do it with S&C myself which would create a step but then the architect should have thought of that tbh.
I wouldn't risk going down some thinner route for fear of break up.


Sounds like tray or step to me.

Diggy

What exactly is likely to break up going from say 20-30mm drop to drain using flexi rapidest n leveler, you lost me there..
Have done it this way for tiling on and vinyl floor and water goes exactly where it should...straight down the drain

 

[On one]

View attachment 60357
That's how I'd do it and have done several wetrooms like this....2x1" wood cut with falls in, rapidset inbetween wood, thin slc then tile

Interesting way of doing it. Do you leave the timber in situ?

 

[On one]

In other words the walk in shower was an after thought ?

I'd do it with S&C myself which would create a step but then the architect should have thought of that tbh.
I wouldn't risk going down some thinner route for fear of break up.

Sounds like tray or step to me.

Diggy

When I first went to look at the job I told the customer non slip vinyl would perfect for the job,even doing myself out of the tiling work. And I left the customer thinking that was what they were going to do, but they have been back on the phone wanting a price for tiling.

 

[Spare Tool]

Yep always left the wood in its only 2x1 scant and only a guide for forming the falls..
I've a wood yard near me that I can take the drawings in and they'll cut the wood to order for a fiver tip...:smilewinkgrin:

 

[On one]

Just out of interest,what are the gradients supposed to be? As in 1 in ? or % terms

 

[Spare Tool]

Just out of interest,what are the gradients supposed to be? As in 1 in ? or % terms[/QUOTE

its only 2mm over a meter, so depending on the length/width of your room that's the least you can make the falls, if the job finishing up to carpet/wood I dare say you've got 30mm to play with.

 

[lizzardtong]

I would go for 2-3% at least.

 

[zimdidit]

Have to sat I agree with S&C . Changing out a standard drain for a weep drain isn't quite as scary as it seems, only problem is convincing your customer that a curb/ step up would be a good idea.

 

[Glynn]

There is a calculation that can be done. It takes into account of the water flow from the shower and the area of the shower. 2 mm seems a little shallow maybe ?

 

[White Room]

I've done 20mm a metre...

 

[Spare Tool]

Yep 2 or 3mm over a metre does seem nothing as a fall and 20-30mm is ideal but as long as the bubble on the right side of the level the water will end up down the drain...water only falls one one way and that's a fact!! If your gonna go the s n c route the dryiing time gotta be taken into consideration, thats why i use rapidset :smilewinkgrin:

 

[Glynn]

Good comments Andy.

 

[Time's Ran Out]

Yep 2 or 3mm over a metre does seem nothing as a fall and 20-30mm is ideal but as long as the bubble on the right side of the level the water will end up down the drain...water only falls one one way and that's a fact!!

Not strictly true - in the southern hemisphere it goes anti clockwise down the drain!

 

[Spare Tool]

Haha very cantankerous John, you must be on the newcybrown....:drool5: