I am building with AAC blocks in a tropical country. The usual practice here is to apply a home-made plaster/stucco (cement/sand mixture) to the wall (which here is more typically mortar). However, the recommendations for AAC suggest that a polymer-modified plaster is more appropriate, with the warning that the stucco/plaster is liable to crack.
Any thoughts on this matter?
I have purchased a pre-mixed skim coat plaster product, which I intend to apply to the home-made plaster. But I am not sure if I am setting myself up for trouble by using the normal plaster rather than the expensive pre-mixed product?