Patio cleaning… gadget or chemical?

Patio cleaning… gadget or chemical?

Author
Discussion

Road2Ruin

5,273 posts

217 months

Wednesday 5th April 2023
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98elise said:
Road2Ruin said:
I used a cheapo bottle of bleach from Tesco, a 5L bucket and scrubbed it in with a brush. Worked perfectly and cost about £1
It won't touch white lichen though. I tried everything and 15% Sodium Hypochloride was the only thing that killed it.
Can't comment specifically as I have no idea what was on my patio, a mix of everything I think. Anyway, it was great and cheap. At 60p a bottle it can't hurt
giving it a go.

Gooose

1,448 posts

80 months

Wednesday 5th April 2023
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Just did mine, generic patio cleaner diluted and sprinkled on with a watering can, scrub with deck brush, then next day use Patio Magic on all the joints to get the black and green out, and a final light spray over the whole patio with what’s left.

Back to looking like new!

I tried a pressure washer before and it just blasts out the joint cement

AyBee

10,550 posts

203 months

Wednesday 5th April 2023
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Gooose said:
Just did mine, generic patio cleaner diluted and sprinkled on with a watering can, scrub with deck brush, then next day use Patio Magic on all the joints to get the black and green out, and a final light spray over the whole patio with what’s left.

Back to looking like new!

I tried a pressure washer before and it just blasts out the joint cement
No pressure washing at all? Used a patio cleaner attachment on mine last year with some bleach brushed on and it helped, but wasn't perfect and it's gone back to being grimy and slippery this year. Will need to sort it before the weather is nice enough for the little one to go out there.

We need some before and after photos!

Gooose

1,448 posts

80 months

Wednesday 5th April 2023
quotequote all
AyBee said:
Gooose said:
Just did mine, generic patio cleaner diluted and sprinkled on with a watering can, scrub with deck brush, then next day use Patio Magic on all the joints to get the black and green out, and a final light spray over the whole patio with what’s left.

Back to looking like new!

I tried a pressure washer before and it just blasts out the joint cement
No pressure washing at all? Used a patio cleaner attachment on mine last year with some bleach brushed on and it helped, but wasn't perfect and it's gone back to being grimy and slippery this year. Will need to sort it before the weather is nice enough for the little one to go out there.

We need some before and after photos!
No pressure washing at all, just elbow grease, used screwfix patio cleaner, then patio magic. I had black build up in the joints and the slabs were getting green, this solves it. Easy really just a bit of hard work

bennno

11,737 posts

270 months

Wednesday 5th April 2023
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Gooose said:
No pressure washing at all, just elbow grease, used screwfix patio cleaner, then patio magic. I had black build up in the joints and the slabs were getting green, this solves it. Easy really just a bit of hard work
Just squirted mine with a hose after spraying it with sodium hypochlorite 30 minutes prior, came up almost like new. No elbow grease.

Gooose

1,448 posts

80 months

Wednesday 5th April 2023
quotequote all
bennno said:
Gooose said:
No pressure washing at all, just elbow grease, used screwfix patio cleaner, then patio magic. I had black build up in the joints and the slabs were getting green, this solves it. Easy really just a bit of hard work
Just squirted mine with a hose after spraying it with sodium hypochlorite 30 minutes prior, came up almost like new. No elbow grease.
I get away with this most of the time, just spray with patio magic, but Ive left it ages and had a load of black gunk build up

mikey_b

1,837 posts

46 months

Thursday 6th April 2023
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What is best for moss in between block paving? My limestone patio responds very well to a straightforward jetwash, in fact it comes up beautifully with little effort - a very satisfying task each spring. My block paving driveway, on the other hand, seems to get thick lines of moss between the blocks (not so much weeds - just moss) and it takes a long time to scrape it all out, only for it all to grow back a few weeks later.

NDA

21,672 posts

226 months

Thursday 6th April 2023
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mikey_b said:
What is best for moss in between block paving? My limestone patio responds very well to a straightforward jetwash, in fact it comes up beautifully with little effort - a very satisfying task each spring. My block paving driveway, on the other hand, seems to get thick lines of moss between the blocks (not so much weeds - just moss) and it takes a long time to scrape it all out, only for it all to grow back a few weeks later.
You could try non biological washing powder. Sprinkle it on a couple of days before rain is expected. Sounds odd, but it worked for me a few years ago.

When the dead stuff has dried out, a yard broom will brush it off.

mikey_b

1,837 posts

46 months

Thursday 6th April 2023
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NDA said:
mikey_b said:
What is best for moss in between block paving? My limestone patio responds very well to a straightforward jetwash, in fact it comes up beautifully with little effort - a very satisfying task each spring. My block paving driveway, on the other hand, seems to get thick lines of moss between the blocks (not so much weeds - just moss) and it takes a long time to scrape it all out, only for it all to grow back a few weeks later.
You could try non biological washing powder. Sprinkle it on a couple of days before rain is expected. Sounds odd, but it worked for me a few years ago.

When the dead stuff has dried out, a yard broom will brush it off.
Interesting idea, plus cheap and easy - I will try it, thanks!

PhilboSE

4,401 posts

227 months

Thursday 6th April 2023
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I have a lot of limestone paving which was pretty badly afflicted with black spot.

Got some 15% sodium hypochlorite, sprayed it on at 4:1 dilution, let it sit for 24 hours. Then used spray nozzle high power on jet washer to “paint” every slab methodically. It was slow work (1 day spraying and 3 days jetwashing) but it’s come up sparkling like new.

I believe the chemicals work better while wet so I did the spraying on an overcast day after some rain.

It’s also killed anything green growing on the paving.

Steve Campbell

2,144 posts

169 months

Thursday 6th April 2023
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mikey_b said:
What is best for moss in between block paving? My limestone patio responds very well to a straightforward jetwash, in fact it comes up beautifully with little effort - a very satisfying task each spring. My block paving driveway, on the other hand, seems to get thick lines of moss between the blocks (not so much weeds - just moss) and it takes a long time to scrape it all out, only for it all to grow back a few weeks later.
I found MMC-Pro to be pretty good for killing the moss, but a block paving takes constant care. I used MMC-Pro and left for a few weeks, then pressure wash, then re-sanded. Then re-apply MMC pro about twice a year for any light growth.

ClaphamGT3

11,326 posts

244 months

Thursday 6th April 2023
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what chemicals are you guys using to get mould off york stone?

ambuletz

10,792 posts

182 months

Sunday 18th June 2023
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What impact does the BAC-50/patio cleaner have on grass? we have grass in both front and back gardens. I previously used a pressure washer, this was probably 7-8+ years ago. Took ages. Both the slabs at the front and rear have grass right next to them and naturally i don't want to be damaging/killing that.

The front garden probably isn't that much of an issue as the perimeter is lined with raised brick, so this can sheild the chemical, rain water or occasional rinsing down with a garden hose (if needed).

However the rear garden doesnt have anything, so any potential rain water could potentially rinse it off into the grass lawn.

UTH

8,999 posts

179 months

Sunday 18th June 2023
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Anyone with blackspot issues, this isn't cheap, but it absolutely does the job: https://patioblackspotremoval.com/products/patio-b...

KTMsm

26,951 posts

264 months

Sunday 18th June 2023
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I'm generally not a fan of attachments as they never seem to work as advertised

However my nilfisk pressure washer came with a patio attachment so I thought I'd give it a try

It's absolutely fantastic, works really well and doesn't affect the joints (on my patio at least)


ARHarh

3,802 posts

108 months

Monday 19th June 2023
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ambuletz said:
What impact does the BAC-50/patio cleaner have on grass? we have grass in both front and back gardens. I previously used a pressure washer, this was probably 7-8+ years ago. Took ages. Both the slabs at the front and rear have grass right next to them and naturally i don't want to be damaging/killing that.

The front garden probably isn't that much of an issue as the perimeter is lined with raised brick, so this can sheild the chemical, rain water or occasional rinsing down with a garden hose (if needed).

However the rear garden doesnt have anything, so any potential rain water could potentially rinse it off into the grass lawn.
BAC50 is OK with grass and plants. Although I do try to avoid getting it on plants and grass. Never noticed any grass dying in all the years I have used it.

bennno

11,737 posts

270 months

Monday 19th June 2023
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Don’t buy branded, just get sodium hypochlorite from farm shop.

98elise

26,743 posts

162 months

Monday 19th June 2023
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bennno said:
Don’t buy branded, just get sodium hypochlorite from farm shop.
Agreed.

This was mine before I used 15% sodium hypochloride



It's now completely clean

blueg33

36,140 posts

225 months

Tuesday 20th June 2023
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Are any of the chemicals safe for pets? I note many of you leave chemicals on overnight. For us that means it could affect hedgehogs and deer as well as our cat.

bennno

11,737 posts

270 months

Tuesday 20th June 2023
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blueg33 said:
Are any of the chemicals safe for pets? I note many of you leave chemicals on overnight. For us that means it could affect hedgehogs and deer as well as our cat.
Sodium hypochlorite takes an hour or so. Then you wash it off.