Quite a few jobs I've worked on have involved rendered walls, and we always used to get the pro's in to do it. But after watching them (and paying a lot for them!) I decided to give it a go myself, with pretty good results. However I went back to a job this week and the paint is seriously bubbling about half way up, needs stripping off and re painting. Now i realise this could be for a number of reasons so I'll explain a bit more...
The rendered walls were only 75cm high and made a stand-alone raised bed. Foundation at ground level (no DPC) I used 6 inch hollows filled with concrete. I put the scratch coat straight on to the blocks (didnt seal the blocks with anything) and then the finish coat with only plasticiser in the mix. Then the inside of the beds were lined with plastic (not perfectly i must admit, and the walls painted with 2 coats of Weatherseal is it? Or something similar exterior masonary paint.
Can anyone give me any pointers where i may have gone wrong? Or if you have a more substantial way of doing it as I have only followed 1 plasterer's advise??? And do you guys try it yourself, or sub it out???
I'd really appreciate your thoughts as just had a job accepted with some more rendering