[chris scott]

 I am talking worse case senario here ...that it is a real mess,with heavy deposits of moss.

260 sqm of tennis court you will need to clean heavy deposits by brush/hand due to access.
350sqm of carpark you could get a sweeper on £200/£250 a day.

I would remove as much of the heavy deposits by /brush/shovel /sweeper. I would then pressure wash it gently ...bearing in mind pressure washing tarmac can cause a right mess to clean up. It can also stripe very easily.

It would then need maintaining with moss and algae-side  every 4/6 months depending on the location of it

[Simon@Pristine Pathways]

Ok then spray with mossgo pro from my backpack?

[chris scott]

Yep..or make a mix up in your pressure washer barrel and spray with PW on  tick over. It's safe to run through the pressure washer.

[Simon@Pristine Pathways]

So whats the best, cheapest and easiest to get hold off ?

[John Kelly]

We supply Algex at £12.00 + vat for 5 litres. Use 1-1 or neat for really severe or up to 1-200. Sold out last pallet should be back in stock in 2 weeks.

[Andrew Briscoe]

We supply Algex at £12.00 + vat for 5 litres. Use 1-1 or neat for really severe or up to 1-200. Sold out last pallet should be back in stock in 2 weeks.

I have used Johns Algex on my decking and paths, applied last April and still clear.

[Simon@Pristine Pathways]

John, there have been a few products mentioned in this thread and yours costs a lot less than the rest?
Does it kill moss ok? Has it the same stuff in it?

Simon

[chris scott]

So whats the best, cheapest and easiest to get hold off ?

Every thing is easy to get hold of...internet. Which one is the best I don't know.
I don't think you will buy cheaper than Johns algex at £12 for 5 litres. The one I use is £80 for 5 litres.
Bleach would work so would Jeyes fluid. They might work out cheaper.

[John Kelly]

One customer uses it on the students residences which are in the shadow of St James park. The sandstone steps were totally green and a serious slipping hazard. Since they used this there have been no further problems and they still get to pressure was every 6 months for bird crap etc. Takes about 3 days to kill moss and algae.

[Simon@Pristine Pathways]

So whats the best, cheapest and easiest to get hold off ?

Every thing is easy to get hold of...internet. Which one is the best I don't know.
I don't think you will buy cheaper than Johns algex at £12 for 5 litres. The one I use is £80 for 5 litres.
Bleach would work so would Jeyes fluid. They might work out cheaper.

chris doesnt bleach take colour out of tarmac?

[Roger Oakley]

So whats the best, cheapest and easiest to get hold off ?

Every thing is easy to get hold of...internet. Which one is the best I don't know.
I don't think you will buy cheaper than Johns algex at £12 for 5 litres. The one I use is £80 for 5 litres.
Bleach would work so would Jeyes fluid. They might work out cheaper.

chris doesnt bleach take colour out of tarmac?

No not if used properly 3:1 mix no more no less. pre-wet.

[chris scott]

A gallon of bleach is more than Johns product so you can rule that one out ...sorry!
Rogers mix would be fine on moss in tarmac.

[drive surgeon]

Listen to Rodger he knows his stuff