Stuart Noble wrote:
Rob Morley wrote:
In article .com
wrote:

Having got to bare masonry, well it's left with some chalky white
stuff. I will wash down what's left and go over with some sandpaper.

Do i now need to use any undercoat? or can i go straight ahead with
masonry paint (which hopefully won't flake and blister this time
round).


If you don't get past the chalky stuff you'll want to treat it with
stabilising solution before you paint it.

Use an oil based paint. Standard "masonry" paint is water based and
won't last long on sills.
Good idea to check that the surfaces are smooth and running away from
the house. Puddles are the main cause of damp on, and under, sills. Car
body filler is ideal for shallow filling

pliolite paints are 15 yr life rated, versus household oil based paints
with a 3 yr life. Figures approximate.


NT