I've been searching like crazy all morning to try and find out what these sort of damp patches are on a new slab paving laid.
I'm sorry, I don't know the technical details or how best to describe so please bear with me. After searching the internet, I thought it could be this 'bed spotting' - but I watched the guys lay it and they didn't do it like that. The used a mix or type 1 and sand, levelled then laid. I'm sure there is a more technical term but I don't know. I asked the landscaper and he said it'll weather in. He has a good reputation hence I'm disappointed in this this appearance. Any help would be appreciated and thanks in advance. JC
That looks like differential curing - it's a problem with some concrete flags, and while it often does disappear, it can take a season or longer, and it sometimes doesn't shift at all.
Tony McC wrote:That looks like differential curing - it's a problem with some concrete flags, and while it often does disappear, it can take a season or longer, and it sometimes doesn't shift at all.
Hi Tony, thanks for the reply and link. Hmmm, yes it does look like it.
So, there's nothing I can really do as not his fault then? Bizarre, as when they went down all looked good - it was only once wet, cold, cleaned etc.. that this happened.
I even had a heater out on one slab last night, to the neighbours amusement I'm sure..
It's not the fault of the installer, but, if they supplied the paving, then they will have to take it up with *their* supplier, and so on up the food chain until it reaches the manufacturer who *may* decide to send out a rep.
