Volma thickness of 8 cm - it is terrible?Questions and answers ›Volma thickness of 8 cm - it is terrible? 0 +1 - 1 Anna asked 10 months ago Good afternoon. Builders for alignment of walls applied 8 cm of Volma plaster on gypsum cardboard. They say, there was a big difference. I worry, at most 6 cm are written. As far as it is critical? Thanks