Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
Patio Black Spot Remover
6,269 views
Skip to first unread message
Martin Pentreath
Jun 11, 2013, 12:12:00 PM6/11/13
to
Hi all,
Does anyone have any experience of this stuff?
http://patioblackspotremoval.com/store/index.php?route=product/product&path=60&product_id=54
By way of background it is intended to remove highly persistent black fungal growth from Indian sandstone paving. I've got some in my back garden, and the black spots have started to appear. They do disfigure the look of the stone, and they multiply each year. I've tried high-powered pressure washing and ordinary moss-and-mould-killing type of stuff - nothing will shift the black spots, and this is the general experience reported by others from a bit of internet research. Indian sandstone is particularly prone to it for some reason.
The stuff in the link claims to do the trick. The reviews on the website all give it five out of five - well there's a surprise! It costs roughly the same as malt whisky, which is fairly horrendous for a cleaning product. If it works it will be worthwhile, because the alternative will be relaying the patio with something less prone to black spots.
Does anyone have any experience of this stuff?
http://patioblackspotremoval.com/store/index.php?route=product/product&path=60&product_id=54
By way of background it is intended to remove highly persistent black fungal growth from Indian sandstone paving. I've got some in my back garden, and the black spots have started to appear. They do disfigure the look of the stone, and they multiply each year. I've tried high-powered pressure washing and ordinary moss-and-mould-killing type of stuff - nothing will shift the black spots, and this is the general experience reported by others from a bit of internet research. Indian sandstone is particularly prone to it for some reason.
The stuff in the link claims to do the trick. The reviews on the website all give it five out of five - well there's a surprise! It costs roughly the same as malt whisky, which is fairly horrendous for a cleaning product. If it works it will be worthwhile, because the alternative will be relaying the patio with something less prone to black spots.
Vir Campestris
Jun 11, 2013, 5:46:11 PM6/11/13
to
I haven't tried i myself - I put up with a few varieties of lichen.
Breaks up the monotony.
Andy
Martin Pentreath
Jun 15, 2013, 9:13:41 AM6/15/13
to
The Natural Philosopher
Jun 15, 2013, 9:17:09 AM6/15/13
to
of blood. Some RED lichen colonised.
The black seems to like mildly acidic conditions and alkali gets em both.
--
Ineptocracy
(in-ep-toc’-ra-cy) – a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers.
Tim Lamb
Jun 15, 2013, 1:53:49 PM6/15/13
to
In message <kphpgl$bpk$3...@news.albasani.net>, The Natural Philosopher
<t...@invalid.invalid> writes
I've just remembered having some left over dairy Sodium hypochlorite.
What would that do to Lichens?
AFAIK dairy use was 0.25-1%
--
Tim Lamb
<t...@invalid.invalid> writes
What would that do to Lichens?
AFAIK dairy use was 0.25-1%
--
Tim Lamb
fred
Jun 15, 2013, 4:17:32 PM6/15/13
to
simon...@pbsr.co.uk
Aug 3, 2013, 8:54:19 PM8/3/13
to
On Tuesday, June 11, 2013 5:12:00 PM UTC+1, Martin Pentreath wrote:
Initially they are not visible to the human eye, but , assisted by the damp and humid conditions, they feed off the minerals in the stonework.
After two years plus, they anchor themselves, growing deeper in their search for minerals, growing both across the stone and deeper into it, hence the reason they cannot be removed by the use of a pressure washer.
The Patio Black Spot Removal system not only kills the Patio Black spots, but the Patio Black Spot Preventer will kill any new spores year on year.
further, the Patio Black Spot Remover brings back and enhances the original colours of the Indian Sandstone.
Never mind being more expensive than Malt Whiskey, it works out at less than 3% of the cost of newly laid Indian Sandstone and less than 1% of the cost of Yorkstone per square metre.
Surely a small price to pay?
If you have an Indian Sandstone or York stone Terrace or Artificial Stone, this is a system, proven in the market place which will keep away those Black Spots forever.
If you have new Indian Sandstone or Yorkstone, buy the Preventer now and stop the Patio Black Spots before they start.
Rejoice in a Great New British Company, with thousands of satisfied users, which has successfully allayed the problem of Patio Black Spots throughout the World.
Remember , The Best is ALWAYS cheapest in the long run
Martin Pentreath
Sep 10, 2013, 6:37:42 PM9/10/13
to
On Sunday, August 4, 2013 1:54:19 AM UTC+1, simon...@pbsr.co.uk wrote:
>
> The Black Spots originate from black lichen spores, and have a two year germination period. They originate from the trees and arrive on your terrace or garden stonework assisted by the wind.
>
> Initially they are not visible to the human eye, but , assisted by the damp and humid conditions, they feed off the minerals in the stonework.
>
> After two years plus, they anchor themselves, growing deeper in their search for minerals, growing both across the stone and deeper into it, hence the reason they cannot be removed by the use of a pressure washer.
>
> The Patio Black Spot Removal system not only kills the Patio Black spots, but the Patio Black Spot Preventer will kill any new spores year on year.
>
> further, the Patio Black Spot Remover brings back and enhances the original colours of the Indian Sandstone.
>
> Never mind being more expensive than Malt Whiskey, it works out at less than 3% of the cost of newly laid Indian Sandstone and less than 1% of the cost of Yorkstone per square metre.
>
> Surely a small price to pay?
>
> If you have an Indian Sandstone or York stone Terrace or Artificial Stone, this is a system, proven in the market place which will keep away those Black Spots forever.
>
> If you have new Indian Sandstone or Yorkstone, buy the Preventer now and stop the Patio Black Spots before they start.
>
> Rejoice in a Great New British Company, with thousands of satisfied users, which has successfully allayed the problem of Patio Black Spots throughout the World.
>
> Remember , The Best is ALWAYS cheapest in the long run
Hi Simon,
>
> The Black Spots originate from black lichen spores, and have a two year germination period. They originate from the trees and arrive on your terrace or garden stonework assisted by the wind.
>
> Initially they are not visible to the human eye, but , assisted by the damp and humid conditions, they feed off the minerals in the stonework.
>
> After two years plus, they anchor themselves, growing deeper in their search for minerals, growing both across the stone and deeper into it, hence the reason they cannot be removed by the use of a pressure washer.
>
> The Patio Black Spot Removal system not only kills the Patio Black spots, but the Patio Black Spot Preventer will kill any new spores year on year.
>
> further, the Patio Black Spot Remover brings back and enhances the original colours of the Indian Sandstone.
>
> Never mind being more expensive than Malt Whiskey, it works out at less than 3% of the cost of newly laid Indian Sandstone and less than 1% of the cost of Yorkstone per square metre.
>
> Surely a small price to pay?
>
> If you have an Indian Sandstone or York stone Terrace or Artificial Stone, this is a system, proven in the market place which will keep away those Black Spots forever.
>
> If you have new Indian Sandstone or Yorkstone, buy the Preventer now and stop the Patio Black Spots before they start.
>
> Rejoice in a Great New British Company, with thousands of satisfied users, which has successfully allayed the problem of Patio Black Spots throughout the World.
>
> Remember , The Best is ALWAYS cheapest in the long run
I'm the original poster. Thanks for the explanation of the black spots. What you say makes sense, and I'd certainly agree that trying to remove them via the annual pressure wash just became a frustrating experience, because it made no difference to them at all. I would just end up with nice clean stone with all grime removed, which just made the black spots all the more apparent.
I certainly was not trying to undermine a new British company, and good luck to you. However, in the interests of saving money for those who look here I have to report that after a summer since my domestos exercise the black spots are still completely gone and the stones still look as good as when they were first laid. Based on how long it took the spots to appear in the first place I would guess that I won't have to repeat the exercise for four or five years, and doing it at the same time as the annual pressure wash would not exactly be a hardship, and would cost me no more than £30 for the entire patio.
Cheers!
Martin
Brian Gaff
Sep 11, 2013, 4:01:20 AM9/11/13
to
I wonder why they do not include inhibitor in the mix when they make the
stones though?
Brian
--
From the Sofa of Brian Gaff Reply address is active
"Martin Pentreath" <martin_p...@hotmail.com> wrote in message
news:09014886-4508-49c5...@googlegroups.com...
stones though?
Brian
--
From the Sofa of Brian Gaff Reply address is active
"Martin Pentreath" <martin_p...@hotmail.com> wrote in message
news:09014886-4508-49c5...@googlegroups.com...
Tim Lamb
Sep 11, 2013, 4:12:19 AM9/11/13
to
In message <l0p80h$vc6$1...@dont-email.me>, Brian Gaff
<Bri...@blueyonder.co.uk> writes
where the washings will end up.
--
Tim Lamb
<Bri...@blueyonder.co.uk> writes
>I wonder why they do not include inhibitor in the mix when they make the
>stones though?
I think a dose of Glysophate also does the job but you need to consider
>stones though?
where the washings will end up.
--
Tim Lamb
Dave Liquorice
Sep 11, 2013, 4:39:08 AM9/11/13
to
On Wed, 11 Sep 2013 09:01:20 +0100, Brian Gaff wrote:
> I wonder why they do not include inhibitor in the mix when they make the
> stones though?
Donno, maybe they didn't realise black spot would be a problem 300
> I wonder why they do not include inhibitor in the mix when they make the
> stones though?
odd million years ago when the York Stone sandstones were laid down?
--
Cheers
Dave.
charles
Sep 11, 2013, 5:09:50 AM9/11/13
to
In article <nyyfbegfubjuvyypb...@srv1.howhill.co.uk>,
well, there was so much sulphur in the air, black spot didn't exit.
--
From KT24
Using a RISC OS computer running v5.18
--
From KT24
Using a RISC OS computer running v5.18
Rick Hughes
Sep 11, 2013, 6:00:14 AM9/11/13
to
On 15/06/2013 21:17, fred wrote:
>>
>>> The stuff in the link claims to do the trick. The reviews on the website all give it five out of five - well there's a surprise! It costs roughly the same as malt whisky, which is fairly horrendous for a cleaning product. If it works it will be worthwhile, because the alternative will be relaying the patio with something less prone to black spots.
>>
>>
>>
>> To reply to my own question, in case anyone else searches for this, I've been tinkering around over the last couple of days. I couldn't quite bring myself to pay £15 a litre for something to spray around the patio. I've found that bleach removes the fungal growth completely, and generally cleans up the patio very nicely. Thin cheap bleach doesn't really do it. I've ended up using proper thick Domestos which has worked really well. It's at the upper end of the bleach price range, but a fraction of the cost of the stuff on the website (I wonder if they just repackage Domestos). I did it over the cool humid days we've just had in London, so the bleach didn't dry for ages, which probably helped. I think putting it on a hot patio so that it drys quickly might not work so well.
>
> Yes I have found a combination of bleach and vinegar the only answer to moss growing on tarmacadam. Initially I found a source of cold water bleach as used by laundries but have since discovered chlorine tablets which are cheaper if a bit of a hassle to dissolve.
>
You use these as a combination ? .... surely they will just cancel each
>>
>>> The stuff in the link claims to do the trick. The reviews on the website all give it five out of five - well there's a surprise! It costs roughly the same as malt whisky, which is fairly horrendous for a cleaning product. If it works it will be worthwhile, because the alternative will be relaying the patio with something less prone to black spots.
>>
>>
>>
>> To reply to my own question, in case anyone else searches for this, I've been tinkering around over the last couple of days. I couldn't quite bring myself to pay £15 a litre for something to spray around the patio. I've found that bleach removes the fungal growth completely, and generally cleans up the patio very nicely. Thin cheap bleach doesn't really do it. I've ended up using proper thick Domestos which has worked really well. It's at the upper end of the bleach price range, but a fraction of the cost of the stuff on the website (I wonder if they just repackage Domestos). I did it over the cool humid days we've just had in London, so the bleach didn't dry for ages, which probably helped. I think putting it on a hot patio so that it drys quickly might not work so well.
>
> Yes I have found a combination of bleach and vinegar the only answer to moss growing on tarmacadam. Initially I found a source of cold water bleach as used by laundries but have since discovered chlorine tablets which are cheaper if a bit of a hassle to dissolve.
>
other out acid + alkali = neutral
or do you apply separately with a rinse in between ?
Terry Fields
Sep 11, 2013, 12:12:50 PM9/11/13
to
the act of 'cancelling each other put' that is important, but what
happens during that process. The acid liberates chlorine atoms from
the bleach - called 'nascent chlorine' in my schoolboy days - which
are highly reactive; it would seem that it is these that perform the
killing-off of the biological growth.
There was a TV series recently about people who keep their houses
spotless, one woman using two bottles of bleach a day. In one of the
programmes she said she mixed bleach with (something I didn't catch
the name of) and claimed that its cleaning power was better than
either product used on its own. I'll wager that was 'nascent chlorine'
too.
Word of warning: if you have no experience of this, *don't do it*.
Follow the instructions on your cleaning products.
*Chlorine gas is nasty*.
Just found on www.yourdictionary.com/nascent
"Nascent
adjective
coming into being; being born
beginning to form, start, grow, or develop: said of ideas, cultures, etc.
CHEM. designating or of the state of an element just released from a
compound and having unusual chemical activity because atoms of the
element have not combined to form molecules: nascent chlorine"
--
Terry Fields
The Medway Handyman
Sep 11, 2013, 1:52:26 PM9/11/13
to
http://www.amazon.co.uk/s/?ie=UTF8&keywords=hg+mould+spray&tag=googhydr-21&index=aps&hvadid=32622782465&hvpos=1t2&hvexid=&hvnetw=g&hvrand=12197953432078175393&hvpone=&hvptwo=&hvqmt=b&hvdev=c&ref=pd_sl_5wsk2rnmn2_b
--
Dave - The Medway Handyman www.medwayhandyman.co.uk
meow...@care2.com
Sep 11, 2013, 6:08:54 PM9/11/13
to
On Tuesday, June 11, 2013 5:12:00 PM UTC+1, Martin Pentreath wrote:
> By way of background it is intended to remove highly persistent black fungal growth from Indian sandstone paving. I've got some in my back garden, and the black spots have started to appear. They do disfigure the look of the stone, and they multiply each year. I've tried high-powered pressure washing and ordinary moss-and-mould-killing type of stuff - nothing will shift the black spots, and this is the general experience reported by others from a bit of internet research. Indian sandstone is particularly prone to it for some reason.
>
> The stuff in the link claims to do the trick. The reviews on the website all give it five out of five - well there's a surprise! It costs roughly the same as malt whisky, which is fairly horrendous for a cleaning product. If it works it will be worthwhile, because the alternative will be relaying the patio with something less prone to black spots.
Bleach is 15p a litre. It needs very long soak times though, 10s of hours.
>
> The stuff in the link claims to do the trick. The reviews on the website all give it five out of five - well there's a surprise! It costs roughly the same as malt whisky, which is fairly horrendous for a cleaning product. If it works it will be worthwhile, because the alternative will be relaying the patio with something less prone to black spots.
NT
Martin Pentreath
Sep 11, 2013, 6:18:54 PM9/11/13
to
On Wednesday, 11 September 2013 23:08:54 UTC+1, meow...@care2.com wrote:
>
> Bleach is 15p a litre. It needs very long soak times though, 10s of hours.
>
If I can hijack the motto of the man from the Black Spot company, you get what you pay for. The Domestos that I used cost a fair bit more than the no-name, 15p-a-litre stuff, but it shifted the spots within 30 mins and they've stayed shifted all summer. I'm guessing the cheap stuff is chemically the same as Domestos, just much more dilute.
>
> Bleach is 15p a litre. It needs very long soak times though, 10s of hours.
>
simon...@pbsr.co.uk
Oct 22, 2013, 7:27:51 AM10/22/13
to
On Wednesday, September 11, 2013 11:18:54 PM UTC+1, Martin Pentreath wrote:
> On Wednesday, 11 September 2013 23:08:54 UTC+1, meow...@care2.com wrote:
>
> > To adopt the thought that "bleach", thick, thin or whatever you choose to buy, will get rid of the Patio Black Spots, is both misleading and to misunderstand where they come from and how they grow.
> On Wednesday, 11 September 2013 23:08:54 UTC+1, meow...@care2.com wrote:
>
Its the same as implying that, if you can use a spade , you are a landscape gardener!
That's not meant to be facetious, but it's true!
It is also to contradict literally hundreds of clients all over the UK who have tried the "household remedies" and those stocked by Garden Centres, Homebase, B & Q of Over the years, that were on the verge of taking up and replacing the stone, before contacting us as a last resort.
I have run a Stone Masonry and Stone cleaning business for the best part of 30 years and have worked all over the World as both a contractor and specialist consultant, including devising a system of removing the black deposits from Jordanian Marble after the first Iraq War, when everyone else went over there with acid!
So starting from a point of fairly vast experience, The R & D carried out before bringing both types of "Patio Black Spot Remover" to the Market took some three years, added to my own personal knowledge. In addition, we utilised the input from existing longstanding Clients.
To get to where we are, we tested EVERYTHING, and I mean everything, on the Market, including all the proprietary brands stocked by Garden Centres, HomeBase, B&Q and so on.
If you have a few "black spots" , depending on how long they have been there, bleach may lighten them, but they will not begin to kill them, or, indeed revive the original colours of the stone work, which , of course, "Patio Black Spot Remover" does.
In addition, the whole PATIO BLACK SPOT REMOVAL system is designed to not just to restore stonework, but cut back on pressure washing, the very action of which will open the pores of the stone, and make it a breeding ground for all Lichen, algae, fungi and so on.
If you really do have serious "Patio Black Spots", consider the above carefully.
It is the reason why we are, currently, the only Company both in the UK and indeed the World, who sell the ONLY Solution available for Patio Black Spot Removal.
It is also the reason that we have umpteen excellent reviews, from all over the UK , by both DIY users and other contented Clients,
I trust this helps?
Martin Pentreath
Jun 3, 2014, 3:06:29 PM6/3/14
to
To update this thread (mainly for the Google archive, see:
https://groups.google.com/forum/#!topic/uk.d-i-y/_4O5s8Ia7qo )
I've just done my annual pressure wash and the thick domestos which I used this time last year has proved to be entirely successful in having eradicated the fungal black spots and kept them eradicated for a year. I say this mainly because the man from the black spot company (who was trying to sell what I suspect is vastly overpriced bleach) had had a rather transparent strategy of undermining the vastly cheaper DIY alternative!
Unless you're made of money I'd strongly suggest giving the normal domestos a go before coughing up for the luxury version!
https://groups.google.com/forum/#!topic/uk.d-i-y/_4O5s8Ia7qo )
I've just done my annual pressure wash and the thick domestos which I used this time last year has proved to be entirely successful in having eradicated the fungal black spots and kept them eradicated for a year. I say this mainly because the man from the black spot company (who was trying to sell what I suspect is vastly overpriced bleach) had had a rather transparent strategy of undermining the vastly cheaper DIY alternative!
Unless you're made of money I'd strongly suggest giving the normal domestos a go before coughing up for the luxury version!
bigge...@gmail.com
Jun 6, 2014, 8:10:01 AM6/6/14
to
Hi , I have the same problem and I'm looking for a solution and read this thread . how did you apply the bleach please ? Diluted with water or just neat ? And did you brush it on ? Or did u really scrub ? Or literally just spray on and leave ? Thanks Steve .
Martin Pentreath
Oct 6, 2014, 2:53:22 PM10/6/14
to
On Friday, June 6, 2014 1:10:01 PM UTC+1, bigge...@gmail.com wrote:
> Hi , I have the same problem and I'm looking for a solution and read this thread . how did you apply the bleach please ? Diluted with water or just neat ? And did you brush it on ? Or did u really scrub ? Or literally just spray on and leave ? Thanks Steve .
Hi, sorry for the late reply. I used proper full-strength domestos, and applied it neat. I did a bit of light scrubbing to get it worked into the stone, and then left it on for around an hour, before rinsing it off the low-pressure way, and then finally pressure washing as usual. The way my patio is set up it was easy to direct the run-off into the drain - I would guess it's a bad idea to get dilute bleach onto your plants.
> Hi , I have the same problem and I'm looking for a solution and read this thread . how did you apply the bleach please ? Diluted with water or just neat ? And did you brush it on ? Or did u really scrub ? Or literally just spray on and leave ? Thanks Steve .
I'd suggest experimenting with one affected stone to see what technique works best for you. If the weather was hot and the stuff was drying up rapidly I'd guess it might be worth moistening it with some sort of mister before it dries completely.
Cheers,
Martin
meow...@care2.com
Oct 6, 2014, 4:25:19 PM10/6/14
to
On Tuesday, October 22, 2013 12:27:51 PM UTC+1, simon...@pbsr.co.uk wrote:
> On Wednesday, September 11, 2013 11:18:54 PM UTC+1, Martin Pentreath wrote:
> > On Wednesday, 11 September 2013 23:08:54 UTC+1, meow...@care2.com wrote:
> > > To adopt the thought that "bleach", thick, thin or whatever you choose to buy, will get rid of the Patio Black Spots, is both misleading and to misunderstand where they come from and how they grow.
>
> Its the same as implying that, if you can use a spade , you are a landscape gardener!
snip. Sales pitch regardless, bleach works. It does. Sorry.
> On Wednesday, September 11, 2013 11:18:54 PM UTC+1, Martin Pentreath wrote:
> > On Wednesday, 11 September 2013 23:08:54 UTC+1, meow...@care2.com wrote:
> > > To adopt the thought that "bleach", thick, thin or whatever you choose to buy, will get rid of the Patio Black Spots, is both misleading and to misunderstand where they come from and how they grow.
>
> Its the same as implying that, if you can use a spade , you are a landscape gardener!
NT
meow...@care2.com
Oct 6, 2014, 4:27:26 PM10/6/14
to
Parrotzone thick bleach is £1 for 2 litres at poundland.
NT
brend...@gmail.com
Apr 20, 2015, 3:41:08 PM4/20/15
to
Hi Martin, just interested to see one year on if the Bleach is still holding up. Tried it tonight and was astonished how quickly the lichens disappeared after spending literally hundreds on 'other' solutions.
guypr...@gmail.com
Jun 5, 2015, 12:34:46 PM6/5/15
to
I've just used this stuff http://www.patioblackspotshop.com it's expensive but absolutely excellent buying more to do the whole patio!! Will put before and after shots online after. I was sceptical to start with and only bought 2 litres now dead chuffed and getting another 4!!
tabb...@gmail.com
Jun 5, 2015, 3:44:30 PM6/5/15
to
On Friday, 5 June 2015 17:34:46 UTC+1, guypr...@gmail.com wrote:
> I've just used this stuff -------------- it's expensive but absolutely excellent buying more to do the whole patio!! Will put before and after shots online after. I was sceptical to start with and only bought 2 litres now dead chuffed and getting another 4!!
why would a diyer spend ££ and wait for days when they can just use bleach? It doesn't make sense. It can't be spam, surely.
NT
> I've just used this stuff -------------- it's expensive but absolutely excellent buying more to do the whole patio!! Will put before and after shots online after. I was sceptical to start with and only bought 2 litres now dead chuffed and getting another 4!!
why would a diyer spend ££ and wait for days when they can just use bleach? It doesn't make sense. It can't be spam, surely.
NT
Rednadnerb
Jun 6, 2015, 7:37:43 AM6/6/15
to
I reached the same conclusion as you when cleaning some bathroom tiles sometime back.
https://groups.google.com/forum/?hl=en#!searchin/uk.d-i-y/rednadnerb/uk.d-i-y/5mHwE6x5eu4/niPRMBULoZUJ
https://groups.google.com/forum/?hl=en#!searchin/uk.d-i-y/rednadnerb/uk.d-i-y/5mHwE6x5eu4/niPRMBULoZUJ
gatac...@googlemail.com
Jun 17, 2015, 5:48:44 PM6/17/15
to
On Tuesday, June 11, 2013 at 5:12:00 PM UTC+1, Martin Pentreath wrote:
> Hi all,
>
> Does anyone have any experience of this stuff?
> http://patioblackspotremoval.com/store/index.php?route=product/product&path=60&product_id=54
>
> By way of background it is intended to remove highly persistent black fungal growth from Indian sandstone paving. I've got some in my back garden, and the black spots have started to appear. They do disfigure the look of the stone, and they multiply each year. I've tried high-powered pressure washing and ordinary moss-and-mould-killing type of stuff - nothing will shift the black spots, and this is the general experience reported by others from a bit of internet research. Indian sandstone is particularly prone to it for some reason.
>
> The stuff in the link claims to do the trick. The reviews on the website all give it five out of five - well there's a surprise! It costs roughly the same as malt whisky, which is fairly horrendous for a cleaning product. If it works it will be worthwhile, because the alternative will be relaying the patio with something less prone to black spots.
Don't bother with the so called Black spot remover, it's silly money and no more effective. First try bleach (cheap stuff is as good as any). Jet wash the surface off to remove debris then apply 1 to 1 mix of water and bleach with a watering can (one you won't need again for plants). Leave it on for half an hour, don't let it dry, then wash off with jet wash again. That works for most people. If that doesn't work try chlorine (granules dissolved in warmish water) from your local swimming pool shop. Use the same method as above using bleach.
> Hi all,
>
> Does anyone have any experience of this stuff?
> http://patioblackspotremoval.com/store/index.php?route=product/product&path=60&product_id=54
>
> By way of background it is intended to remove highly persistent black fungal growth from Indian sandstone paving. I've got some in my back garden, and the black spots have started to appear. They do disfigure the look of the stone, and they multiply each year. I've tried high-powered pressure washing and ordinary moss-and-mould-killing type of stuff - nothing will shift the black spots, and this is the general experience reported by others from a bit of internet research. Indian sandstone is particularly prone to it for some reason.
>
> The stuff in the link claims to do the trick. The reviews on the website all give it five out of five - well there's a surprise! It costs roughly the same as malt whisky, which is fairly horrendous for a cleaning product. If it works it will be worthwhile, because the alternative will be relaying the patio with something less prone to black spots.
Martin Pentreath
Jun 17, 2015, 6:15:09 PM6/17/15
to
On Monday, April 20, 2015 at 8:41:08 PM UTC+1, brend...@gmail.com wrote:
> Hi Martin, just interested to see one year on if the Bleach is still holding up. Tried it tonight and was astonished how quickly the lichens disappeared after spending literally hundreds on 'other' solutions.
My original treatment from the beginning of this thread (exactly two years ago) has held out fine. By way of reminder, I'd used thick domestos neat, which cleared a burgeoning black spot problem. Total cost less than twenty quid, versus several hundred for bottles of what I suspect is bleach with a fancy name from the official black spot people.
> Hi Martin, just interested to see one year on if the Bleach is still holding up. Tried it tonight and was astonished how quickly the lichens disappeared after spending literally hundreds on 'other' solutions.
The full thread is here:
https://groups.google.com/forum/#!topic/uk.d-i-y/_4O5s8Ia7qo
(PS Call me hardened old cynic, but do you think Guy Press could be ever so slightly related to the black spot people??)
carole....@gmail.com
Mar 25, 2016, 11:43:20 AM3/25/16
to
Have just read your post as we, too, have a growing problem of black spots due to lichen on our relatively new Indian sandstone patio and paths. Could you please tell me how you applied the Domestos - did you have to scrub each stone and then rinse it off? Problem for us is that we have a vast amount of the stone and the thought of scrubbing individual stones is more than a bit daunting!
Carole Samuels
Many thanks
Martin Pentreath
Mar 25, 2016, 7:19:06 PM3/25/16
to
Hi Carole,
I put the domestos on neat, and lightly scrubbed it around a bit with a yard broom. I certainly wasn't on my hands and knees with a scrubbing brush. I left it on for a good few hours, hosed the patio down gently, and then pressure-washed it the same as I do every spring. The bleaching was very easy, much less time consuming than the subsequent pressure-washing. Less than an hour I reckon. I think it was the chemical effects of the bleach which killed off the lichen, rather than any elbow grease from me.
My patio is relatively small, maybe 20sqm. It's a couple of years ago now, but as I recall I used around three or four large bottles of domestos. The black spots have not yet returned, but when they do I shall not hesitate to do it again.
For those reading on Usenet, the original thread is archived at https://groups.google.com/forum/#!topic/uk.d-i-y/_4O5s8Ia7qo
Cheers!
Martin
I put the domestos on neat, and lightly scrubbed it around a bit with a yard broom. I certainly wasn't on my hands and knees with a scrubbing brush. I left it on for a good few hours, hosed the patio down gently, and then pressure-washed it the same as I do every spring. The bleaching was very easy, much less time consuming than the subsequent pressure-washing. Less than an hour I reckon. I think it was the chemical effects of the bleach which killed off the lichen, rather than any elbow grease from me.
My patio is relatively small, maybe 20sqm. It's a couple of years ago now, but as I recall I used around three or four large bottles of domestos. The black spots have not yet returned, but when they do I shall not hesitate to do it again.
For those reading on Usenet, the original thread is archived at https://groups.google.com/forum/#!topic/uk.d-i-y/_4O5s8Ia7qo
Cheers!
Martin
andy...@gmail.com
Mar 27, 2016, 11:08:15 AM3/27/16
to
Hi Martin
Can you let me know what mix of domestic bleach to water you used?
Thanks for sharing your experiences. Just what we need. Andy
Can you let me know what mix of domestic bleach to water you used?
Thanks for sharing your experiences. Just what we need. Andy
Martin Pentreath
Mar 27, 2016, 4:35:43 PM3/27/16
to
Hi Andy,
I used neat domestos. There is more information if you read back up the thread.
I used neat domestos. There is more information if you read back up the thread.
carole....@gmail.com
Mar 28, 2016, 11:54:52 AM3/28/16
to
carole....@gmail.com
Mar 31, 2016, 7:00:41 AM3/31/16
to
Have just tried some ordinary thick household bleach which we diluted so that it could be used in a sprayer. A miracle has been achieved - it looks like our previously ruined paving now looks as it did when new! Thank you so much!
Carole
Bob Martin
Mar 31, 2016, 8:44:18 AM3/31/16
to
in 1472811 20160331 120038 carole....@gmail.com wrote:
>On Monday, 28 March 2016 16:54:52 UTC+1, carole....@gmail.com wrote:
>> On Friday, 25 March 2016 23:19:06 UTC, Martin Pentreath wrote:
>> > Hi Carole,
>> >
>> > I put the domestos on neat, and lightly scrubbed it around a bit with a=
>On Monday, 28 March 2016 16:54:52 UTC+1, carole....@gmail.com wrote:
>> On Friday, 25 March 2016 23:19:06 UTC, Martin Pentreath wrote:
>> > Hi Carole,
>> >
>yard broom. I certainly wasn't on my hands and knees with a scrubbing brus=
>h. I left it on for a good few hours, hosed the patio down gently, and then=
>pressure-washed it the same as I do every spring. The bleaching was very e=
>asy, much less time consuming than the subsequent pressure-washing. Less th=
>an an hour I reckon. I think it was the chemical effects of the bleach whic=
>h killed off the lichen, rather than any elbow grease from me.
>> >
>> > My patio is relatively small, maybe 20sqm. It's a couple of years ago n=
>> >
>ow, but as I recall I used around three or four large bottles of domestos. =
>The black spots have not yet returned, but when they do I shall not hesitat=
>e to do it again.
>> >
>> > For those reading on Usenet, the original thread is archived at https:/=
>> >
>/groups.google.com/forum/#!topic/uk.d-i-y/_4O5s8Ia7qo
>> >
>> > Cheers!
>> >
>> > Martin
>>
>> Thank you very much, Martin, we'll give it a try.
>
>Hi Martin,
>
>Have just tried some ordinary thick household bleach which we diluted so th=
>> >
>> > Cheers!
>> >
>> > Martin
>>
>> Thank you very much, Martin, we'll give it a try.
>
>Hi Martin,
>
>at it could be used in a sprayer. A miracle has been achieved - it looks l=
>ike our previously ruined paving now looks as it did when new! Thank you =
>so much!
>Carole
What proportions did you use?
Martin Pentreath
Mar 31, 2016, 8:23:15 PM3/31/16
to
Excellent - very glad to hear it worked for you.
gra...@bygrave.org
Jul 30, 2016, 6:50:44 AM7/30/16
to
On Wednesday, September 11, 2013 at 9:39:08 AM UTC+1, Dave Liquorice wrote:
> On Wed, 11 Sep 2013 09:01:20 +0100, Brian Gaff wrote:
>
> > I wonder why they do not include inhibitor in the mix when they make the
> > stones though?
>
> Donno, maybe they didn't realise black spot would be a problem 300
> odd million years ago when the York Stone sandstones were laid down?
>
>
> --
> Cheers
> Dave.
Hehe. Oh you wicked man!
> On Wed, 11 Sep 2013 09:01:20 +0100, Brian Gaff wrote:
>
> > I wonder why they do not include inhibitor in the mix when they make the
> > stones though?
>
> Donno, maybe they didn't realise black spot would be a problem 300
> odd million years ago when the York Stone sandstones were laid down?
>
>
> --
> Cheers
> Dave.
Hehe. Oh you wicked man!
Peter
Aug 23, 2016, 6:44:03 PM8/23/16
to
replying to Martin Pentreath, Peter wrote:
I have recently purchased a 4 litre drum of black spot remover for my natural
sandstone patio from The Patio Black Spot Removal Company Ltd ( yes, it is
really called that!) and it works brilliantly, I was pleasantly surprised as I
had tried many other products that have not worked. It is expensive at £65
for 4 litres, but it works, which is great. All my lovely patio stone colours
have returned.
--
for full context, visit http://www.homeownershub.com/uk-diy/patio-black-spot-remover-901443-.htm
I have recently purchased a 4 litre drum of black spot remover for my natural
sandstone patio from The Patio Black Spot Removal Company Ltd ( yes, it is
really called that!) and it works brilliantly, I was pleasantly surprised as I
had tried many other products that have not worked. It is expensive at £65
for 4 litres, but it works, which is great. All my lovely patio stone colours
have returned.
--
for full context, visit http://www.homeownershub.com/uk-diy/patio-black-spot-remover-901443-.htm
will.hu...@gmail.com
Oct 17, 2016, 3:28:00 AM10/17/16
to
I just did the arithmetic. £65 for 4 litres. More expensive than malt whisky you say? Do you find that £16 per litre buys you good whisky? Where do you get such cheap whisky and is it any good?
Anita Palley
Mar 17, 2017, 2:14:35 PM3/17/17
to
Thanks for this. The cheaper bleach option worked for me.
nicebu...@gmail.com
Mar 30, 2017, 2:54:32 PM3/30/17
to
On Saturday, 6 June 2015 12:37:43 UTC+1, Rednadnerb wrote:
> I reached the same conclusion as you when cleaning some bathroom tiles sometime back.
>
> https://groups.google.com/forum/?hl=en#!searchin/uk.d-i-y/rednadnerb/uk.d-i-y/5mHwE6x5eu4/niPRMBULoZUJ
I have just used black spot remover and give it 3 stars not 5 it gets rid of some but by no means leaves the stonework as new.The claims are grossly overrated.The result is on a par with Domestos,The drawback with Domestos is the smell and the efect it has on some plants
> I reached the same conclusion as you when cleaning some bathroom tiles sometime back.
>
> https://groups.google.com/forum/?hl=en#!searchin/uk.d-i-y/rednadnerb/uk.d-i-y/5mHwE6x5eu4/niPRMBULoZUJ
Martin Pentreath
Mar 31, 2017, 9:40:41 PM3/31/17
to
Hi, I started the thread nearly four years ago. As far as I can tell, the official black spot stuff is just bleach sold at a vastly inflated price. The reviews on Amazon and elsewhere are, let's just say, suspect. Anyone who is fortunate enough to find this thread first via Google should try domestos first.
https://groups.google.com/forum/m/?pli=1#!topic/uk.d-i-y/_4O5s8Ia7qo
https://groups.google.com/forum/m/?pli=1#!topic/uk.d-i-y/_4O5s8Ia7qo
mike.do...@googlemail.com
Apr 7, 2017, 11:20:14 AM4/7/17
to
Thanks, Martin, and to everyone else who contributed to this thread. Have just washed my Indian sandstone patio for first time in 2 years to find black spot in certain areas. Will try the bleach option first. Regards, Mike
apmi...@gmail.com
May 12, 2017, 2:41:53 PM5/12/17
to
Used Asda Thick Bleach (currently 2 x 1 lt for £1) - worked a treat. Initially used it neat but also found that a 1:1 dilution with water also worked OK.
My method - use a watering can to damp the slabs. Pour on the bleach - just drizzle over the slabs. Then use a yard brush to work all over the slab (getting a nice foam) paying particular attention to edges. Leave to dry. Hose down. My slabs run adjacent to my lawn but by saturating the adjacent lawn, the lawn looks perfect. Really pleased with the results!
My method - use a watering can to damp the slabs. Pour on the bleach - just drizzle over the slabs. Then use a yard brush to work all over the slab (getting a nice foam) paying particular attention to edges. Leave to dry. Hose down. My slabs run adjacent to my lawn but by saturating the adjacent lawn, the lawn looks perfect. Really pleased with the results!
0 new messages