This reminds me of a job a few years ago. S&C scratch coat in December. The air was very damp and cold although the scratch looked dry. We decided not to wet down and put a 6mm coat of s&c dash receiver on. The wall had ansorbed so much moisture it was rippling on the scratches.
It was one of those jobs where you put yhe wall on, watch a film and it would still be too wet when you came back 2 hours later.
We had to be be very light on the shovel with that one and we had a few splits but got away with it.
On the other hand I had the opposite this last February. Put dash receiver on a ewi thin coat base at 8am temperature 3c. It appeared to be sucking in but I knew this base did not absorm water. It was found to be rapid drying. The heat absorbed into the insulation was making the teceiver dry out at 3c!
Lesson learned there. Tell the customer to keep the heating off the day before.
If this job is a mess but sets hard, then base coat over what you have, there will be loads of key. Scratch the base coat, dry out and dash with a receiver but this time dont use primer or adhesives, the base won't need it just a good scratch.
Loads of base coats to choose from. K Rends, Parex Maite or evem Parmurex, most ewi thin coats.
