View Single Post
Old 08-05-2012, 19:48   #12
martyh
Guest
 
Location: newcastle upon tyne
Services: Sky Q silver bundle Sky Q 2TB box Sky Q mini box Sky fibre unlimited Sky Talk evenings and week
Posts: n/a
Re: How to remove black marks from bricks?

Quote:
Originally Posted by Taf View Post
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
  Reply With Quote