Am considering wall insulation. The sponge finished rendering is 3 year
old and freshly painted 1 month ago and in excellent condition. Would
you trust the installers to fill the holes to match the rest of the wall.
I was thinking maybe to ask them not to make it flush with the wall and
then I would come along and do my own mix and filling (carefully).
Would I need to know the exact grade of sand the renderer used and what
sort of sponge he used.I don't want to have any scars/shadows as to
where it was plugged.

What do you reckon guys.