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Posted: Fri Aug 17, 2012 9:48 am
by apples
I am hoping someone out there can help me! I recently jetwashed my patio as I do at least 4 times a year (slightly obsessed i know) and this time black spots and smudges appeared! These would not come off with the jet washer!! My patio looks as if a printer ink cartridge has exploded! Does anyone have any ideas on how i can remove these marks. The patio is only 2 years old.

Posted: Fri Aug 17, 2012 9:52 am
by London Stone Paving
Apples

Could you post some photos on the site for us to take a look at?

Use an image hosting website like photobucket to post them. If you cant work it out then PM me and I will post them for you

Steve

Posted: Fri Aug 17, 2012 10:24 am
by London Stone Paving
Images posted on behalf of Rachel. Where is Roger ?

Image

Image

Posted: Fri Aug 17, 2012 1:15 pm
by apples
Roger where are you, I understand you are the expert! :D

Posted: Fri Aug 17, 2012 6:07 pm
by lutonlagerlout
looks like algae or lichen which jet washing alone will not shift
roger knows the answer to this
LLL

Posted: Tue Aug 21, 2012 1:23 pm
by Tony McC
Lichen - see DealingWith Lichens



Edited By Tony McC on 1345551844

Posted: Sat Aug 25, 2012 7:51 am
by RAPressureWashing
Looks like Lichen from the photos, on the stains page main site
http://www.pavingexpert.com/stains.htm
There is a mix "Berries & Fruit" this will rid the paving of the black Lichen and clean the paving up no end.