Fitting shower waste - no tray

[misterneil]

Excuse the lack of expertise - I'm a plumbing virgin!
I'm currently building an open shower in the corner of a largish bathroom. The floor is concrete on brick supported by reinforced concrete beams above a cellar (this is in Spain by the way) I plan to make the floor to a fall using cement sealed with 'gaucho' - a thick paint-on rubber membrane. This will then be tiled probably with small tiles on mesh. My question is what type of trap is best for this and how is it best fitted?

[whitebeam]

Could also try the Plumbing Forum | Plumbing Advice | Plumbers Forums | A forum for plumbers advice in the UK

[faithhealer]

how easy it getting the waste chased out, perhaps a gulley along one wall so your fall is only going one way

[misterneil]

At present the 'floor' of the shower area is 80mm below the level of the tiled floor of the rest of the bathroom (the area is 140 x 85cm). As the room is above a cellar I can knock through pretty much any where as long as I avoid the beams. Can you advise me as to the best solution.
I've tried to insert a photo, don't know if it worked.
Thanks for your help. Cheers, NeilC

[timeless john]

Take a look at the WEDI FUNDO video on youtube and see if the drain outlet is suitable for your situation.
You can contact Wetdecs on this forum for other advice.

[Polishtradesman]

To make good waterproof insolation in wet areas especially on floor, i would use two component product like http://www.mapei.it/Referenze/Multim...elastic_gb.pdf
in the corners of shower use special tape. It gives you quarantee that screed and wall will not "drink" water from shower. For wall you can use something like this http://www.mapei.it/Referenze/Multim...m%20wps_gb.pdf

[misterneil]

Thanks for suggestions, my most urgent question is about the trap / fitting without having a tray or former. If this was in UK I'd go for a former but can't find suitable one in Spain. Cheers, NeilC

[365drills]

This is how I used standard wall / floor tiles to create a shower with no tray.



Raised deck with the trap underneath