The external render on my house is well overdue for painting. The house is around 8 years old and I believe this will be the first time it has been painted since new.
There are a number of hairline settlement cracks in the render which presumably need to be filled before I paint it. Some of them are genuine hairlines, whilst others are possibly as much as half a millimetre wide.
The surface of the render has a sandy texture so I assume I can't just use the same "slap some polyfilla in and sand it down" technique that I would use on an internal wall..
Can anyone advise me as to what I should fill them with?
Picture at http://www.rimfall.demon.co.uk/private/cracks.jpg