Quote:
Originally Posted by Taf
What caused the staining? Is it an acidic water coming from a combi-condenser?
|
It's typical of using the black rubber seals around the vent .Rainwater hits and finds the drip point at the bottom where the particles of rubber are concentrated and drip onto the brick .
@Snoopz (and anyone else who has this issue) A couple of coats of brick sealer will stop it getting into the pours of the brick and make it easier to get off in future