Limewash Paint on External Render
External cement render can easily be painted with limewash paint
External cement rendered surfaces should be free from any dirt and dust, finished to the standard that does not require additional coatings (ie crack-free). It also should be free from absorption limiting substances, such as acrylic gap sealers, overspray with other paints etc.
External renders are best applied in two coats to avoid ghosting of the block/brick joints. If the wall is free standing allow for a water proof capping with an overhang.
You can paint directly on to the cement rendered surface, even if it is still damp.
Should the surface be dry and too absorbent to easily stretch out the paint then dampen the surface sufficiently. Do not thin the paint.
Paint wet in wet (always catch the edges before they have dried).
For large areas ensure adequate scaffolding and manpower.
Number of Coats:
Two coats usually suffice.
Paint only with a minimum of three clear days without rain or protect the surface from rain after painting. Do not paint if the wall and air temperature is at 5 deg C or below.
A more detailed instruction manual is being worked on will become available here soon!