Right final shot at this,
Paving laid, (pre-sealed which should make no difference) then grouted.
He didn't leave enough time for the medium used to lay the paving to dry, (Limestone wicking up moisture) then grouted so again not enough time for the grouting to cure before starting to seal the paving, plus with the over kill of applying coat upon coat of sealer the whole area is saturated and not drying. Also the temperatures to low to seal anyway, with it being a conservatory to cold maybe ?Also maybe not taking off any excess sealer (pooling) so all leading to a fail?
Even if this is not the right answer, tell us the bloody answer
So it was too cold to seal...everthing else you could disregard?
Chris if that is aimed at me then Yes, to cold and damp paving/tiles both add up to a failure, then the overkill of sealer. Chris you will have seen this loads of times, and on exterior paving so why is this now going round & round in circles
Roger not aimed at you at all.
The substrate was dry...according to Kevin
Pre-sealing with an impregnator does what exactly...
The correct way to apply a impregnating sealer is wet on wet till you are moping up the surplus...so over application is virtually impossible and would not hinder curing.
So that only leaves us with it being to cold.
The prize winning question was
Quote "What do you think went wrong or he did wrong?"
The answer is
"Why it went wrong is it was to cold to seal and what he did wrong was he allowed himself to be bullied by the homeowner".