Plaster tolerance

What plaster tolerance means

Plaster tolerance describes how flat, plumb, straight, and aligned wall surfaces must be before final finishes are installed. It is a measurable quality issue, not an aesthetic opinion.

Why investors and builders care

Poor wall tolerance becomes visible when light grazes the surface, cabinets meet walls, skirtings reveal waves, or door trims expose uneven returns. Fixing it late damages schedule and finished work.

Typical mistakes

• Walls are accepted by eye without straightedge or level checks.
• Joinery zones are not held to tighter tolerance than general walls.
• Lighting reveals plaster defects only after paint and fixtures are installed.

What to verify

• Flatness and plumbness in critical finish and joinery zones.
• Corner alignment and opening reveals.
• Sample acceptance before broad repetition.