Posted: Mon Nov 16, 2020 7:06 pm
Hello,
Sorry for the delayed reply - I don't receive an email to say a reply has been made so I have just checked in to see if people could see the photos & apologise for not putting a later set on yet.
Tony, please use the photos as you wish, and there's no need to credit me etc. I'm glad if they can be of use.
It is worth noting that the paving is old so maybe that has helped its appearance - also see my caution below if letting the ACV sit for a prolonged period. (The results you have seen were after scrubbing for 5-7minutes and then rinsing off).
Scaffolding was up for about 10 days, and we had a lot of rain in the middle of that. I should have learnt by now with all the problems we've had with work on this house but nevertheless I trusted the roofer and his choice of scaffolder. When I asked afterwards he said he'd never known it before - I don't believe him.
Latest status: No photos yet but most of the definition has gone from the stains. I will follow up.
I suspect I have speeded up the process. Because the blocks are old and already have non-uniform colouring I let the ACV sit on the blocks for ~30mins. This has led to some localised staining (cleaning?) but it doesn't look too bad and will blend in over time and when I clean with a moss / algae killer in the new year. Therefore I would not recommend leaving the ACV for a prolonged length of time on new blocks etc.
Sorry for the delayed reply - I don't receive an email to say a reply has been made so I have just checked in to see if people could see the photos & apologise for not putting a later set on yet.
Tony, please use the photos as you wish, and there's no need to credit me etc. I'm glad if they can be of use.
It is worth noting that the paving is old so maybe that has helped its appearance - also see my caution below if letting the ACV sit for a prolonged period. (The results you have seen were after scrubbing for 5-7minutes and then rinsing off).
Scaffolding was up for about 10 days, and we had a lot of rain in the middle of that. I should have learnt by now with all the problems we've had with work on this house but nevertheless I trusted the roofer and his choice of scaffolder. When I asked afterwards he said he'd never known it before - I don't believe him.
Latest status: No photos yet but most of the definition has gone from the stains. I will follow up.
I suspect I have speeded up the process. Because the blocks are old and already have non-uniform colouring I let the ACV sit on the blocks for ~30mins. This has led to some localised staining (cleaning?) but it doesn't look too bad and will blend in over time and when I clean with a moss / algae killer in the new year. Therefore I would not recommend leaving the ACV for a prolonged length of time on new blocks etc.