Can you limewash over painted walls or painted brick?
Frequently yes, but two things decide it: the limewash product and the coating already on the wall. Lime needs a porous mineral surface, and most latex and acrylic paints are not one. Where paint is sound, several brands offer a mineral or bonding primer; fresh drywall usually wants a primer of its own before that. Some limewash ranges are sold only for uncoated masonry. Elastomeric coatings are generally excluded too, so a wall with peeling, chalking or elastomeric paint may have to be stripped.
How long does exterior limewash last?
Three variables decide it: exposure, substrate and the specific product. Rather than flaking, limewash thins slowly, and the sides of a building that face driving rain normally show wear before the rest. Treat it as a finish that is recoated periodically, following the maintenance guidance for whichever product is used.
Is limewash the same as whitewash or German schmear?
Not quite, although the words get mixed up. Historically whitewash was made from lime or chalk as well; in today’s American home-improvement usage the word normally refers to watered-down latex on brick. German schmear is wet mortar smeared across brick and partially removed. Limewash is a mineral coating based on lime: it soaks in and cures, lets texture show through when applied thinly, and accepts a fresh coat later.
What affects the cost of a limewash project?
The answer moves with the square footage and height involved, the amount of cleaning or stripping required, whether a primer is required, the coat count, any scaffold or lift for exteriors and stairwells, and the product selected. A firm number normally follows an inspection of the surfaces and, ideally, sampling.
Can limewash be cleaned?
Light dusting, yes; scrubbing, no. Damp sponging depends on the product, since some makers permit gentle cleaning and others describe their unsealed finish as non-wipeable. In kitchens, bathrooms and busy commercial rooms, the choice is between a maker’s protective topcoat, which can change sheen and breathability, and a splashback.
Do I need a permit to limewash my house in Seattle?
For ordinary houses, probably not for the limewash itself: Seattle’s Department of Construction and Inspections lists painting a building as work that usually does not need a building permit, though scaffolding, repairs or other work may have their own rules. The answer can change for a designated landmark or a property in one of Seattle’s historic districts, such as Pioneer Square, Pike Place Market, Columbia City, Ballard Avenue or Harvard-Belmont, where exterior changes can need a Certificate of Approval from the Department of Neighborhoods. Columbia City’s guidelines also restrict coating unpainted masonry, so check with the Historic Preservation Program before limewashing an exterior in these areas.
Will my wall look exactly like the sample photos?
No two limewashed walls match, which is why people choose it. Texture, absorbency, brush direction and drying weather all shift the result, so if a close match matters to you, judge by a board brushed on your own kind of surface rather than by photographs.