Hello

We are installing wetrooms in private flats in a new build project. The bathrooms are on a concrete slab, we have a screed layer of around 110mm within which to place the shower waste, and slope for the shower drainage. I want to avoid having to use any prefab trays or proformas. My question is can we tile directly onto the screed, or do we need a waterproofing layer? Can you use a paint application or is a membrane best? Also, the shower walls will be tiled, can we use a membrane or paint behind this, welded to the floor system?

Has anybody had any experience with hand-screeding in particular, and how do we get this with a consistent slope?

ONE MORE question: what about slip resistance in the floortiles? The Designer is insisting on 600x600mm square floortiles, I can only find these in R9 slip, apparently we will need R10 - ie pretty rough. Any thoughts?

If any of you have done something similar, please share your thoughts, I can't even get Zurich to advise us on this one,
many thanks

Your fall for the shower base should be 20mm in 1m and the rest of the floor would have a fall of 10mm in 1m. That how much I do anyway.
110mm for a floor is a deep screed

Id choose a differant size tile aswell, imposible to get the right amout of fall without having huge lips.

Trev

Could try searching for one of these, helps for forming a screed tray

Click on the picture

Originally Posted by wetroom novice

Hello

We are installing wetrooms in private flats in a new build project. The bathrooms are on a concrete slab, we have a screed layer of around 110mm within which to place the shower waste, and slope for the shower drainage. I want to avoid having to use any prefab trays or proformas. My question is can we tile directly onto the screed, or do we need a waterproofing layer? You will need an uncoupling membrane for new screeds Can you use a paint application or is a membrane best? Also, the shower walls will be tiled, can we use a membrane or paint behind this, welded to the floor system? Membrane is best

Has anybody had any experience with hand-screeding in particular, and how do we get this with a consistent slope?

ONE MORE question: what about slip resistance in the floortiles? The Designer is insisting on 600x600mm square floortiles, I can only find these in R9 slip, apparently we will need R10 - ie pretty rough. Any thoughts?

If any of you have done something similar, please share your thoughts, I can't even get Zurich to advise us on this one,
many thanks

You have specified 60x60 tiles, unless you have graded a floor previously you will have a nightmare with this size. If working over a former we would not recomend tiles of this size, your first job is to sort this with your specifier !!!!!!!!!!!!!!!

What gulley are you thinking of using ?????

How many have you got to do ??????????????


..

I don't wish to be insulting or anything but if you are not able to or don't kno how to get a smooth slope on the screed without a pre form system may I suggest that either you need exactly that i.e. a preformer or you might want to sub contract this bit to a pro screeder. It is a very skilled type of screeding and you need a consistent and flat fall. If you do it without former you are likely to end up with uneven slopes or curved slopes.