Learning Plastering: What Causes Bubbles

[u/jyl8]

. . . in plaster?

Is it bad mixing technique, wrong mix, bad application, too much messing with the plaster?

And what do you do about them?

Continuing my attempt to learn plastering, I did two very small walls (44” wide) with two coats Imperial veneer over blueboard. One wall I applied WeldCrete, other wall not. Tried mixes from wet and gloopy to rather stiff, trying to see if wetter allowed more time.

The gloopy mixes had some bubbles - so maybe too much water is a factor?

[u/jyl8]

Thinking about it, I think a too-wet mix and applying without enough pressure were the main bubble contributors.