Q I know that blue board is not the same as standard drywall. But if drywall has already been hung, would a Level 5 finish be comparable to plaster skim coat?

A Myron Ferguson, a JLC Live presenter and drywall contractor in Galway, N.Y., responds: Level 5 is the highest-quality finish possible on regular drywall (see “Application and Finishing of Gypsum Panel Products,” gypsum.org), and it is significantly different from veneer plaster on blue board. A Level 5 finish is most often achieved by...

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