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Where Artistry Begins
How long plaster takes to dry depends on which plaster it is, how thick it is and the conditions in the room. A modern skim, a lime plaster and a Venetian plaster all dry differently. This guide gives plain answers for each, plus how to tell when plaster is ready.
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A standard modern skim usually needs several days to dry before painting, and thicker backing coats take longer. Cold, damp or poorly ventilated rooms slow it down. Fresh plaster is dark and patchy, and it turns an even, pale colour as it dries. Paint too early and the paint can peel or blister.
Lime dries and hardens slowly, because it sets by taking carbon dioxide from the air rather than by a quick chemical set. Coats are left to firm up between applications, and full hardening carries on over weeks. Lime should not dry too fast, so it is protected from direct heat, strong sun and draughts.
Venetian plaster is laid in very thin coats, so each coat dries much faster than a skim. As an example from the manufacturer data we work from:
Always follow the data sheet for the product you use. Read Venetian plaster drying time: touch dry, cured and waxing.
| Speeds it up | Slows it down |
|---|---|
| Steady warmth | Cold rooms |
| Gentle ventilation | Damp, closed rooms |
| Thin coats | Thick coats |
| A dry background wall | A wet background wall |
Avoid blasting new plaster with heaters, which can cause cracks.
Yes, once the new plaster has fully dried and has been primed. See preparing walls for Venetian plaster.
A modern skim usually needs several days, and longer in cold or damp conditions. Wait until it is an even pale colour all over.
Different thicknesses and damp spots dry at different speeds. Give it time and steady ventilation.
Each thin coat dries in hours, but the whole finish takes more than one day because coats need time between them.
A guide to how many coats limewash and limewash paint usually need, and how long to wait before each coat and before judging the colour.
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