Posted: Wed Jun 29, 2016 9:55 am
Hello to all
Would greatly appreciate some help regarding staining on a patio I laid some 12 months ago. Slate paving laid on 6:1 wet bed, SBR slurry to underside of paving and jointed with Rompox Easy. When the patio was finished all was well, I continued working on other tasks at this property on and off for a further 2 months, all was well, made a couple of further visits back over the winter months, again all was well…....until now, over the past month these stains have begun to appear randomly over the paving, the home owners (lovely people) have said that they have not used any chemicals on the paving or contributed to the problem in any way as far as they know and are just as perplexed as I am. Also these stains have also appeared on some un-laid surplus paving that was stored in another area of the garden.
https://www.dropbox.com/sc/0aus2bvxlajrcmw/AACsTc7jJuAhSeUr8vFduQV4a
https://www.dropbox.com/sc/mvdovwl7z85tdvc/AACi1EX2SzTEyh39pGMdz9Wba
The stains seem to vary in pattern, quite hard and flat, almost cement like.
As the un-laid paving is also affected it would seem not to be an issue with the method of construction, nor immediate environmental issue as the un-laid paving is stored in a different location. Scratching my head a lot with this!! Some form of lichen type growth? There is quite a heavy leaf fall onto the patio area and in the location of the surplus paving, is it possible decomposing leaf fall has introduced this?? I would love to be able to identify the problem and treat accordingly rather than trial and error with a host of chemicals and cleaners. Anyone had similar problems?
Thanks in advance for any help.
Kind regards
Would greatly appreciate some help regarding staining on a patio I laid some 12 months ago. Slate paving laid on 6:1 wet bed, SBR slurry to underside of paving and jointed with Rompox Easy. When the patio was finished all was well, I continued working on other tasks at this property on and off for a further 2 months, all was well, made a couple of further visits back over the winter months, again all was well…....until now, over the past month these stains have begun to appear randomly over the paving, the home owners (lovely people) have said that they have not used any chemicals on the paving or contributed to the problem in any way as far as they know and are just as perplexed as I am. Also these stains have also appeared on some un-laid surplus paving that was stored in another area of the garden.
https://www.dropbox.com/sc/0aus2bvxlajrcmw/AACsTc7jJuAhSeUr8vFduQV4a
https://www.dropbox.com/sc/mvdovwl7z85tdvc/AACi1EX2SzTEyh39pGMdz9Wba
The stains seem to vary in pattern, quite hard and flat, almost cement like.
As the un-laid paving is also affected it would seem not to be an issue with the method of construction, nor immediate environmental issue as the un-laid paving is stored in a different location. Scratching my head a lot with this!! Some form of lichen type growth? There is quite a heavy leaf fall onto the patio area and in the location of the surplus paving, is it possible decomposing leaf fall has introduced this?? I would love to be able to identify the problem and treat accordingly rather than trial and error with a host of chemicals and cleaners. Anyone had similar problems?
Thanks in advance for any help.
Kind regards