Category: Finishes
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
Emulsion paint is a water-based paint for interior walls and ceilings. It dries fast, has little odour and comes in finishes from matt to semi-gloss.
Why it matters on a project
Matt hides surface defects; semi-gloss cleans more easily in kitchens and corridors. The choice depends on how the room is used, not taste alone.
Measurement and pricing
Measured in square metres, with number of coats and primer stated in the specification.
Worked example
50 m² of walls, two coats, coverage 10 m² per litre per coat: quantity = 50 × 2 ÷ 10 = 10 litres.
Common mistake
Painting over plaster that has not fully dried, so patches and peeling appear.
Frequently asked questions
How many coats do walls need?
A primer then two finish coats usually; dark colours may need an extra coat.
What is the difference between matt and semi-gloss?
Matt hides defects and looks calm; semi-gloss wipes clean more easily and suits busy areas.
Related terms
- Putty (skim coat)A thin smooth layer over plaster preparing the surface for paint.
- Plaster (render)A cement or gypsum layer applied to walls to level them before paint or cladding.
- Surface preparationCleaning a steel surface to a specified grade (e.g. SSPC-SP 10) before coating to ensure adhesion.
- Dry film thickness (DFT)The thickness of a coating after drying, measured in microns and checked against the specification.
Read next
- Work out quantities with our free calculators: concrete, tiles, paint and plaster. Open the calculators
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