I've been asked to do a terolean job but its to go over painted render.the render was done to a poor finish is it ok to apply straight over or do i need to prime/seal it first.
dont know for sure ive never been over paint with tyrolean , a sbr and cement slurry would create a certain ammount of suction if you left it a day or two but you wouldnt have any key , maybe give it a second slurry with some sand in ??? but im guessing now .
The only advice id give here is steer well clear if theres no suction its going to run and look crap, sounds like a it could be a lot of work for little return tbh
sbr cement slurry. possibly a bit of sand for key. youll probably have to leave it about an hour between coats of tyrolean though. stil do able in a day or 2 depending on size.
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