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How do i remove a black stain on an external wall which was caused by leaking pipe?
Anonymous user 23/02/2024 - 2.40 PM
A leaking pipe has caused a black 'shadowy' type stain on an external roughcasted wall. Is this stain mould growth? How do i get rid of it without all the roughcast stones falling off?
Are you a tradesperson and able to answer this question?
2 Answers
Anonymous user
A weak brick acid mix applied with a paint brush may loosen the stain and repeating this procedure could loose the stain all together. (the stain sounds like it is a form of mould growth or liken)
Answered22 April 2012
1
Anonymous user
Have you tired brick acid
Answered22 April 2012
1