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Posted: Thu May 24, 2012 10:04 am
by debyat
Help.... I have had 60sq mtrs of flags laid on a bed of merseygrit and dry cement as instructed and within 6 months you can see what I can only describe as brown spotting appearing on the flags. This is not just happening to one offs but I would say 75% also getting small holes appearing. I have photos but not sure how to show them, do not have URL??? can attach though
Please help
Posted: Thu May 24, 2012 10:31 am
by Carberry
Need to upload photos to a site like photobucket or something to post them here.
What type of stone is it?
Posted: Thu May 24, 2012 1:25 pm
by debyat
My Webpage
Hopefully this is the link to the photos.
Posted: Thu May 24, 2012 1:26 pm
by debyat
Stone type is pre cast concrete flags, riven style
Posted: Thu May 24, 2012 1:39 pm
by local patios and driveway
Yep, i have seen this on the very same stone im not really allowed to mention names but it is a common buff riven 450mm x450mm concrete slab.
The producing company have no explanation but im of a mind that its a fault in the manufacturing process. We've not found a way to solve the issue
Posted: Thu May 24, 2012 2:07 pm
by debyat
Does anyone think that by using a sealer will maybe not reslove but will make look better?
Posted: Thu May 24, 2012 2:30 pm
by local patios and driveway
I doubt it. It'll look the same but shiny or matty.
Posted: Thu May 24, 2012 3:37 pm
by debyat
Thanks
Posted: Thu May 24, 2012 5:16 pm
by lutonlagerlout
looks like a manufacturing fault,and they will almost certainly try and wriggle out of it
LLL
Posted: Thu May 24, 2012 8:22 pm
by London Stone Paving
[quote="local patios and driveways"]Yep, i have seen this on the very same stone im not really allowed to mention names
Why not ?
Posted: Thu May 24, 2012 8:43 pm
by local patios and driveway
Because the supplier has asked me to rectify the issue on their behalf and i dont want to complicate the issue. I will say they want us to acid wash the slabs and see what effect that has
Posted: Thu May 24, 2012 8:45 pm
by Carberry
local patios and driveways wrote:Because the supplier has asked me to rectify the issue on their behalf and i dont want to complicate the issue. I will say they want us to acid wash the slabs and see what effect that has
I hope they're paying you to do testing that they should have done before the production stage.
Posted: Thu May 24, 2012 9:53 pm
by mickg
I may of missed something here but I can't see how a acid wash or sealer could fill the holes in ?
Posted: Thu May 24, 2012 10:20 pm
by local patios and driveway
Weve not experienced holes but have a dark bloom coming up in to the slab, it cant be washed or scrubbed so acid next
Posted: Thu May 24, 2012 10:31 pm
by lutonlagerlout
i tried rogers patented jollop last night on some green garden furniture and that worked a treat
acid wash IME will slightly enhance the colour of wet cast concrete slabs,but it wont fix holes caused by manufacturing problems
LLL