fixing base

[rab.c]

Hi

I have an exterior tiled patio that i want to tile over, i have knocked out all the faulty tiles that were broken or sounded hollow and was wondering what i could use to screed the depth of the missing tiles area with to bring it up to the same level as the ones that are good.
was going to use bal quick cement or was thinking of a sand cement mortar with feb fibremix in it to make it really hard.
Any ideas appreciated.
The area will then be getting tiled over with porcelain tiles using bal rapid set flexi.

thanks

 

[White Room]

Hi and welcome.....I'd use a sand/cement screed, use sharp sand/river washed from builders merchants but not to course which some of the diy sheds sell.
Go for a 4-1 mix, slurry the areas with a sbr and cement mix.

 

[rab.c]

Thanks for the advice,should the sand cement mix be semi dry or mixed as a mortar ?
also will it be ok to leave exposed to the weather as it may be a few weeks later for the tiles to go down.
the whole area will then be primed with sbr and tiled using bal rapid set flexi and grouted with bal flexi grout