just a quick question, i'm tiling a bathroom tomo where the walls are uneven. I've already primed the walls and filled the really uneven places with rapid set addy. What addy should i use to tile? stick with the rapid set or use something that will give me a longer working time as the walls are still not perfect? The tiles are ceramic but some will need extra addy behind to keep it all level. Sould i use a 10mm notched trowel aswell or will an 8mm do? any advice welcome!!

If the walls aren't right as you say and it needs a bigger notch 10mm or bigger, depending on just how far out the walls are I would go for rapid, purely for the amount of time the addy would need to set if it were tubbed, if it sets. If the walls are that far out why not put them right ? or at least put it to the customer ?

If you have some build up to do mapei keraflex maxi would be ideal but it's whats available in your area, try the 8mm but if the walls are that bad use the 10mm. You say your've primed, what with

would try and straighten the walls out with rapid set befoe tiling,it will save a lot of hassle and time!

yep, with DC get as flat as you can before tiling

Try Technik OPF brilliant