Category: Finishes
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
Putty (filler) is a fine material applied over plaster or gypsum in thin coats and sanded, to fill pores and small defects and give a smooth surface before painting.
Why it matters on a project
The number of putty coats and the quality of sanding make the difference between ordinary and premium paintwork, more than the paint brand itself.
Measurement and pricing
Usually included in the painting item per square metre, with the number of coats stated in the specification.
Common mistake
Applying one thick coat instead of thin ones, so it cracks or peels later.
Frequently asked questions
How many putty coats for good paintwork?
Two to three thin coats with sanding between, depending on the surface and finish level.
Is ready-mixed putty better than site-mixed?
Ready-mixed is more consistent and easier to apply, provided it suits the paint system.
Related terms
- Plaster (render)A cement or gypsum layer applied to walls to level them before paint or cladding.
- Emulsion paintWater-based paint for internal walls and ceilings, in various sheen levels.
- Surface preparationCleaning a steel surface to a specified grade (e.g. SSPC-SP 10) before coating to ensure adhesion.
- Gypsum board (drywall)Gypsum panels on metal framing for dry walls and ceilings.
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