Guide to Limewash
Limewash is the lime equivalent of paint. In its pure form is finely sieved lime putty diluted with water. Pigments can be added to produce the broad range of creams, buffs, pinks, yellows and reds which adorn so many traditional buildings. To increase the durability of limewash linseed oil, tallow or casein can be added.
- Mix lime putty with clean water to the consistency of thin cream.
- Pour the mixture through a fine seive.
- Add pigments by first mixing powdered earth pigment with a little warm water in a screw top and shaking well. Add this liquid to the white limewash and mix thoroughly.
- Thin mixture again to the consistency of creamy milk.
- Brush down and flush loose dust from stone/plaster surface.
- Dampen stone/plaster surface thoroughly.
- Apply using a large bristle brush working the limewash well into the surface paying special attention to eroded areas, cracks and fissures.
- Apply up to four coats allowing one day curing between each coat.
Protect limewashed surfaces from premature drying as it is essential that limewash dries slowly and remains damp for at least four hours to ensure maximum strength. Limewashed surfaces may be dampened down with fine mist sprays if early drying is a problem.