Reducing Algae/Moss on Concrete...?

[The Z'eer]

Very recently I've cleaned via pressure washer a long concrete path and area outside the back door. Cleaned up rather well considering it's age...



...I'd kind of like to keep it this way too considering the length of time it took to clean it all.

Sadly this area is prone to algae and moss, I wondered if anyone had a suggestion a as to what I might apply to the surface to prevent the nasty slimy stuff returning??

Thanks

 

[eLuSiVeMiTe]

Very recently I've cleaned via pressure washer a long concrete path and area outside the back door. Cleaned up rather well considering it's age...

View attachment 217220

...I'd kind of like to keep it this way too considering the length of time it took to clean it all.

Sadly this area is prone to algae and moss, I wondered if anyone had a suggestion a as to what I might apply to the surface to prevent the nasty slimy stuff returning??

Thanks

Seal it maybe?

 

[brightspark]

jeyes fluid kils the algae

 

[Gragson]

I had been jet brushing mine for a fair few years, does quite a bit of damage to the mortar over time.
Can't recommend this stuff more, takes less time to do, lasts longer and does no damage - you will need a sprayer tho.

https://www.ebay.co.uk/itm/Patio-Cl...318655?hash=item48e17703bf:g:KzQAAOSwdNleYn40

 

[voipio]

Patio cleaner from a pool supplies shop does the job. The stuff that is labelled as 15% hypochlorite. For use, it needs to be quite dilute. Start with 1 part patio cleaner in 50 parts water (0.3% working concentration), and apply with a watering can, sufficient to wet the surface rather than drench it. Apply when rain is due, and just leave it on and let the rain rinse it off. If the algae grows back sooner than you'd like, increase the concentration to 1 part in 20 of water (0.75%), and for even greater effect, go up to 1 part in 10 (1.5%), but consider that as a maximum.

 

[brightspark]

here https://www.google.co.uk/search?sou...i357j0i131j0i10.pvQrSl2rWnc#spf=1584468743286

 

[colnerov]

Hi, ISTR that @The_Yellow_Ardvark posted about a weedkiller using thick bleach and white vinegar.

Colin

 

[The_Yellow_Ardvark]

Hi, ISTR that @The_Yellow_Ardvark posted about a weedkiller using thick bleach and white vinegar.

Colin

I did, here it is.


This weed killer is very easy to make, inexpensive, and can block weed growth for up to 6 months!

The measurements are easily to follow, if you want more, just scale up keeping the scales the same.

Dish washer or pool Salt (1/2 pint)

Water (1/4 pint)

Distilled White Vinegar (5%, 3/4pint)

Washing up soap (1/4 pint)

Measurement cups.

Dispensing bottle.

Mix the ingredients together. If the salt has not dissolved add more water or vinegar.

This works well on Ivy and other waxed leaves plants as well as grass.


Plus it is harmless to pets, it will also discourage neighbourhood cats doing their business.

Why Vinegar?

The acidity of Vinegar kills the weeds and its roots, and is also used as a "liquid vessel", where it carries the pool salt and dish soap when sprayed onto plants.

Why Water?

Although water dilutes the solution, it helps save your precious vinegar and does not drastically reduce the effectiveness of the weed killer.

Why Pool Salt?

Salt is notorious for its use in the olden days, where if there was a dispute, men would salt their victim's land, making it barren and unable to grow crops. This would effectively destroy their source of food and income. Pool salt is a very cheap alternative to regular table salt, and still gets the job done.

Why Dish Soap?

Dish soap helps the salt and vinegar cling onto the stem and leaves, making the weed killer much more effective.

 

[pedrobedro]

Get some Crikey Mikey on it.

 

[hotponyshoes]

If you are anywhere near frome bring round a bottle as I have got some algicide here.
I spray it onto horseboxes/boats etc after cleaning and it keeps the green stuff away for at least 6months if not a year..

 

[decca]

Jeyes path and patio cleaner kills it off and keeps it at bay for a while at least.

 

[steveo3002]

bottle of cheapo bleach does it ...push it around with some water and a broom , leave 20 mins and rinse off , doesnt seemto hurt the lawn either

 

[Divingdad]

Bleach is the way to go, I do my extensive stone and concrete using this method. A good rinse dilutes the beach into a harmless run off. plants and insects unharmed. Jeyes fluid kills everything.

 

[The Z'eer]

Seal it maybe?

I certainly would if it was freshly laid concrete, without a doubt.

 

[The Z'eer]

jeyes fluid kils the algae

Generally I use Jeyes for mouthwash, has a nice scent to it and far cheaper than Corsodyl

 

[eLuSiVeMiTe]

I certainly would if it was freshly laid concrete, without a doubt.

Pressure wash it. treat it to kill the algue and seal it with something like this.

https://www.screwfix.com/p/thompson...BvWAa7Y1dGWyxY6mpXJpJpYBLHcGSk9UaAk_SEALw_wcB

 

[The Z'eer]

I had been jet brushing mine for a fair few years, does quite a bit of damage to the mortar over time.
Can't recommend this stuff more, takes less time to do, lasts longer and does no damage - you will need a sprayer tho.

https://www.ebay.co.uk/itm/Patio-Cl...318655?hash=item48e17703bf:g:KzQAAOSwdNleYn40

You're right about the abrasion caused from jet washing.

How long have you been using the above product? Does it keep the concrete completely moss/algae free? I do have a sprayer though.

 

[Morrisman]

Bleach is the way to go, I do my extensive stone and concrete using this method. A good rinse dilutes the beach into a harmless run off. plants and insects unharmed. Jeyes fluid kills everything.

Proper bleach, Domestos, work very well. 50/50 with water, brush it on and leave a few hours, then wash off.

Cheap Coop bleach does very little, get the good stuff.

 

[The Z'eer]

Pressure wash it. treat it to kill the algue and seal it with something like this.

https://www.screwfix.com/p/thompson...BvWAa7Y1dGWyxY6mpXJpJpYBLHcGSk9UaAk_SEALw_wcB

That's a tried and tested method and you've not experienced any algae since?

 

[The Z'eer]

If you are anywhere near frome bring round a bottle as I have got some algicide here.
I spray it onto horseboxes/boats etc after cleaning and it keeps the green stuff away for at least 6months if not a year..

That's a splendid offer, sadly I'm a few hours away from yourself in Essex. What algaecide do you use?