Ash Gall

exactly the Crosswater tray is stone resin completely flat underneath and they warn you to make sure all the area is in contact otherwise there is a risk it will crack in in supported areas. I have noticed it I quite thin in places

Never realised Mastercrete actually has plasticiser it only mentions improver in their tech note. Did everyone know that ?

Do you mean the Major bag

Thanks for your help on tanking but anyone got an answer to the mortar questions

What about the Mappei kit ?

What do you think of the Mappei waterproofing kit ?

I am installing a very heavy stone resin shower tray Crosswater Linear 1500x800 in a u shaped 1500wide x800 deep space plasterboard walls in upstairs bathroom with P5 flooring. Instructions insist on setting tray on mortar 5:1 ratio with a plasticiser my questions are: 1 )do I need any form of additional waterproofing 2 )how much plasticiser do I use in the mortar mix 3 )how much sand do I need for this area 10mm thick 4) plan to use my mate and glass suckers to lift onto mortar difficulty in u shape area is there a simple trick alternative