If you're asking whether Earthaus Limewash can go directly over painted walls, the answer is that Limewash can be applied over previously painted or sealed walls, but only if they are properly primed first. Limewash bonds differently than conventional paints — it requires either a porous substrate to absorb into or a primed surface to create mechanical adhesion. Skipping primer on non-porous surfaces may cause poor adhesion or dusting.
When Primer Is Required
Limewash cannot absorb into painted, sealed, or smooth substrates. These surfaces must first be coated with a PVA or latex primer to create a uniform base layer.
Use a primer when applying Limewash over:
Drywall (painted or new)
Previously painted walls (any sheen level)
Sealed or painted brick or stone
Why it matters: primer ensures even absorption and prevents the "ghosting" effect where drywall joints or patched areas absorb more pigment than others.
Note: Earthaus does not manufacture a primer. Any interior zero- or low-VOC PVA or latex primer is suitable.
When Primer Is Not Required
On porous, unsealed substrates, Limewash naturally penetrates the surface, bonding chemically with the mineral base.
Primer is not required for:
Lime, clay, or gypsum plaster
Raw brick or stone
Cement or lime stucco
Adobe, cob, or compressed earth block (CEB)
Why it matters: these mineral or earthen surfaces allow Limewash to breathe and integrate fully, creating a durable, vapor-permeable finish.
Application Notes
Always ensure the substrate is clean, dry, and sound before priming or painting.
For previously painted surfaces, remove dust and oils that could prevent adhesion.
Apply two coats of Limewash over primed walls for best coverage and color depth.
Still Have Questions?
Email support@earthausplaster.com or text 1-800-917-2414.