Topic
Plaster
Practical guidance on plaster thickness, drying, cracks, adhesion and methods for controlling wall flatness.
Calculators
Guides
Can You Paint or Wallpaper Fresh Plaster?
Fresh plaster should not be covered until it has reached the condition required by the plaster and finish manufacturers. A surface that feels dry may still hold moisture inside.
Gypsum Plaster or Cement Plaster: Which Fits the Job?
Gypsum and cement plaster are chosen for different conditions. The right option depends on moisture exposure, substrate, layer requirements and the next finish—not a universal ranking.
How to Calculate Average Plaster Thickness
Average coat thickness is a planning value taken from several measurements across the wall. The deepest local spot remains a separate check against the plaster system limits.
What Are Plaster Guides Used For?
Plaster guides provide a physical reference for a consistent wall plane when deviations are significant. They are a method of control, not a universal requirement for every surface.
Why Does Plaster Crack?
A crack may belong only to the plaster layer, or it may reflect movement in the substrate. Check its pattern, growth and surroundings before choosing a repair.
How Long Does Plaster Take to Dry?
Wait for the actual plaster system to reach the condition required by the next finish. Mix, thickness, substrate and room conditions all affect drying, so one fixed timetable is unreliable.
How Thick Can a Plaster Coat Be?
There is no universal maximum plaster thickness. Use the range in the selected product data sheet and treat average thickness, local depth and the number of coats as separate decisions.
Why Does Plaster Come Loose?
Loose plaster is an adhesion and substrate problem, not just a surface blemish. Remove failed material safely, find the cause and only then choose a compatible repair.
How to Choose the Right Primer
The right primer depends on the substrate and the next material, not just the word “universal” on the label. It can control absorption or help adhesion, but it cannot repair a weak wall.
Can You Tile Over Plaster?
Tile can be installed over plaster when the layer is sound, cured, dry, clean and compatible with the adhesive system. Plaster alone is not proof that the substrate is ready.
How to Check If a Wall Is Flat
Wall flatness is checked with a long straightedge in several directions, while a level or plumb line checks vertical alignment. Record where the high and low spots are.
Can You Wallpaper Fresh Plaster or Filler?
Fresh walls are ready for wallpaper only when plaster or filler has dried, stabilised and been prepared for the chosen adhesive. A calendar date alone cannot prove readiness.