Dark gray mould on exterior rammed earth (limestone) wall

House about 700 metres from Safety Bay ocean.
Used ’30 seconds Outdoor cleaner concentrate’ then Crommelin ‘Limestone & Sandstone sealer’. Within 2 years mould stains return.
Can it be better?
Thank you.

28510cookie-checkDark gray mould on exterior rammed earth (limestone) wall

3
Leave a Reply

avatar
  Subscribe  
Notify of
Dr Chemical

Nope – given the intrinsic problems with limestone, I’d say a 2y turnaround is pretty good. Crommelins are good products