pressure cleaning patio

searchlight123

i spent a large part of yesterday pressure washing my patio. it is constructed of 18" rough surface creamy yellow slabs. whilst some came out fine some are still pretty badly marked where dark dirt has not been removed well from the rough surface.
i did only use water and am wondering if there is a product anyone can recommend that i can put on the slabs in advance of doing it again that may help shift the dirt fully?

keystone

Use it on jet rather than wide angle spray.

Cheers

searchlight123

keystone wrote: »

Use it on jet rather than wide angle spray.

Cheers

hi
i did keep it on a fairly narrow jet but to do it all on a very narrow jet would take days. i was hoping there was something i could apply to the surface leave on a while to soften ingrained dirt, algae etc and then jet off?

david39

Jeyes Fluid will usually do it, but you need to ensure that the water runs off into s drain and not a plant border.

searchlight123

david39 wrote: »

Jeyes Fluid will usually do it, but you need to ensure that the water runs off into s drain and not a plant border.

patio runs onto lawn. will jeyes fluid kill the grass then?

Peater

Thanks for raising this. I have a patio (enclosed on 3 sides, drained on 4th) which i power-hosed in the autumn. There is still heavy marking from where flower pots etc used to be and was looking for a solution.

Also, is there any kind of surface seal/protector that can be applied afterwards to stop the moss/algae coming back so easily?

happybiker

once it's clean, a good coating of 'Wickes paving and patio sealer' will ensure it stays easy to clean.
http://www.wickes.co.uk/paving-and-patio-seal-clear/invt/600359/

My patio was so bad 4 years ago that I had to sandblast it . Once done, I treated it with the Wickes stuff and haven't needed anything more than a quick swill with a hosepipe ever since

clairey179

soda crystals! sprinkle them on, dampen with a watering can (sprinkly head thing), then leave for 2-3 days. After that, hose down. They are about 80p per kilo in my local co-op, needed 1 whole bag to do my patio.
I did mine the other week, first time I'd done it, previous house owners hadn't done it in years by the looks of it, and the soda crystals let me hose of mose, mud etc, and it looks so much better now!
Also much cheaper than the specific patio cleaners.
(Got the tip from one of the threads on star drops :money:)
HTH

ormus

my bosch jetwash has a rotor power lance nozzle. cleans almost anything away.

Martyn_H

clairey179 wrote: »

soda crystals! sprinkle them on, dampen with a watering can (sprinkly head thing), then leave for 2-3 days.
HTH

Are soda crystals safe with pets?

yvonne13_2

Jeyes fluid is the best just put some on mix with water use a broom to brush it in then jet away you should see the difference.