For many hundreds of years Limewash has been in use on historic and listed buildings as well as more recent buildings that do not have a damp proof course. Walls that do not have a damp proof course (DPC) will absorb moisture from the ground, this moisture will rise up the walls and if a non-breathable coating is applied to the exterior wall this moisture is then trapped and its only means of escape is inwards creating damp patches on interior walls. If a non microporous paint is applied to the interior wall then there is no where for this moisture to go it will then push the paint coating off the walls. It will also be absorbed by any timber in the wall causing it to rot.
Used on historic and listed buildings as well as buildings with out a DPC that need to breath limewash has proved to be ideal as it offer around 96% breathability (almost 5 times more permeable that emulsion paint) allowing any trapped moisture to escape to the atmosphere rather than being contained in the wall.
Limewash is available in a wide rang of colours and a special limewash called Pozzolan limewash has been developed to incorporate a unique adhesion promoter for mixed surfaces increasing its adhesion to smooth and mixed surfaces such as flint and engineering bricks. If you are looking for an environmentally friendly paint coating that will help you building last for many years to come we suggest you use limewash but please note that if a non breathable product has been applied to a wall limewash will not make it breathable.