Posted: Mon May 02, 2011 8:34 pm
Hi
I had a patio layed just over a year ago (wet pressed concrete slabs) which immediately showed circular marks on a majority of the slabs. I spoke to the manufacturer who siad this was likely to be salt and would disappear in time but to call back if it didn't. I also stated slabs delivered were very different colour to those seen at the supplier.
As advised I left this for another 10 months and with no improvement to the marks I called back at which point photos were requested.
I have now received a letter stating that the installation method used is incorrect and is causing these marks. I paid for the patio to be installed professionally and believe from what I have read on this site a close joint method has been used. The manufacturer is stating that this method would cause the stains as water would collect causing a chemical reaction, leading to a darkening on the perimeter of the flag.
Sure markings were there before slabs were even laid... Also I brought some more slabs in store for umbrella stand and these seem a completely different colour.
Can you please advise is the installation method likely to have caused this? Is there anything I can do to improve appearence? would re-laying with bigger gap really resolve or could I use some kind of coloured sealant?
Sorry for long query, but so disappointed with results after spending my hard earned cash. Any advise appreciated?
I had a patio layed just over a year ago (wet pressed concrete slabs) which immediately showed circular marks on a majority of the slabs. I spoke to the manufacturer who siad this was likely to be salt and would disappear in time but to call back if it didn't. I also stated slabs delivered were very different colour to those seen at the supplier.
As advised I left this for another 10 months and with no improvement to the marks I called back at which point photos were requested.
I have now received a letter stating that the installation method used is incorrect and is causing these marks. I paid for the patio to be installed professionally and believe from what I have read on this site a close joint method has been used. The manufacturer is stating that this method would cause the stains as water would collect causing a chemical reaction, leading to a darkening on the perimeter of the flag.
Sure markings were there before slabs were even laid... Also I brought some more slabs in store for umbrella stand and these seem a completely different colour.
Can you please advise is the installation method likely to have caused this? Is there anything I can do to improve appearence? would re-laying with bigger gap really resolve or could I use some kind of coloured sealant?
Sorry for long query, but so disappointed with results after spending my hard earned cash. Any advise appreciated?
