granite patio stain

bazbrady · 07-04-2013 02:51PM #1

hi ,i had a patio installed last summer and the granite slabs have a staining on them ,this seemed to occur within a month or two of them going down..i tried using patio cleaners different makes and srubbing it with deck scrub to no avail.alot of other cleaners and small section with bleach.im wondering is it some sort of oil/resin in the granite and how can i get rid of it..at 50euro a square meter i expected the granite to be easier kept and cleaner than sandstone etc..it was put down under 4" 804 hardcore and same of sand .any advice on what to do would be great...pics attached

policarp · 09-04-2013 06:34PM

These look like damp stains.
Does it change appearance during dry spells?

bazbrady · 10-04-2013 11:41AM

no its the same stain during dry periods these pics were actually taken last week and we had no rain...im wondering does granite have defects like this ..is there such a thing as poor quality granite slabs?.im at a loss to what it is and tried every cleaning product..its definitely in the slab..

NobodyImportant · 10-04-2013 02:09PM

worth giving conservation technology a ring on Davitt road. They have very specialist cleaning solutions for every particular stone type.

bazbrady · 11-04-2013 10:27AM

thanks ill give them a buzz today ,see how i get on..

red sean · 11-04-2013 01:46PM

Just remember that granite is permeable and therefore many liquids will soak into it. It is also slow to dry out.
I've had a similar problem with a stain on a headstone. Was recommended expensive chemicals to clean it but took the free advice of an old stonemason. Wait for a few months and let it dry by itself. He was right. It's like new again a year later.
Just my tuppence worth!

bazbrady · 12-04-2013 12:48PM

thanks sean but its down nearly two years now so i doubt its still drying..unless people have heard it can take this long?not sure myself but if i was to guess 2 years would be sufficient time to fully dry id think.

red sean · 12-04-2013 12:56PM

bazbrady wrote: »

thanks sean but its down nearly two years now so i doubt its still drying..unless people have heard it can take this long?not sure myself but if i was to guess 2 years would be sufficient time to fully dry id think.

I'd have a chat with the supplier or fitter of similar paving and get a free opinion first. You'll probably find it's not that uncommon.
What the old guy said to me was to remember that stone is like a very dense sponge, VERY dense, so it takes anything a very long time to pass through it from top to bottom.
Let us know if you get advice or treatment or whatever!

granite patio stain

Comments