bleach on indian sandstone

sunnyday1234

Hi Guys
I Have a nice patio area of indian sandstone. It gets very green and i was wondering if i use a thick bleach solution on it would it damage the colour ?

I would add bleach to water, brush on and leave for ten mins and then power wash off with a gentle washer

what ye think ?

Hotei

I don't think bleach would stain Indian sandstone to be honest, but using bleach isn't environmentally friendly. If I were you, I would power wash the stone. If you don't have a power washer, you can hire one.

Edit: Silly me, but I just read where you say you have a power washer.:o
I think the power washer would suffice.

sunnyday1234

Hotei wrote: »

I don't think bleach would stain Indian sandstone to be honest, but using bleach isn't environmentally friendly. If I were you, I would power wash the stone. If you don't have a power washer, you can hire one.

Edit: Silly me, but I just read where you say you have a power washer.:o
I think the power washer would suffice.

thanks. To get the slabs really clean using the powerwasher i have to go up very close with the washer and i think thats bad for the stones. A bit of bleach rubbed on and then gently washed works wonders. #

how is using bleach so bad for the environment ?

amdublin

I cleaned my stones this year with a 2/3 to 1 water and bleach solution.
I watercanned it on and then let the rain wash it off. They came up incredible.

amdublin

Ps mine aren't Indian sandstone. Can't recall what they are.

galljga1

Bleach will work just fine on sandstone. The powerwasher will lift flakes here and there but it is unnoticeable. The powerwasher will however lift the grout, especially if you have used Rompox or similar. Heavy concentration bleach is also very effective at removing the black spots (lichens of some sort) that tend to colonise sandstone in our climate. There is no need to wash it off. The rain will do same and I think it becomes ineffective (if that is the correct word) after a period of time, not sure how long it takes.

sunnyday1234

thanks guys

webpal

What bleach would you use OP?

Sonnenblumen

A small (half cup) amount of domestic bleach in a bucket of water is all that is required. Best method to power wash area first , apply diluted bleach with a watering can (ideally fitted with a rose). Leave area to soak overnight and power wash again next day.

One needs to be very careful with bleach, very corrosive/toxic, so one needs to be very careful using bleach near soil/planted areas.

sunnyday1234

webpal wrote: »

What bleach would you use OP?

parazone

Hocus Focus

Use Patio Magic, available in many hardware stores. I have certainly seen it in Murtaghs Topline, in Ashbourne. Spray it on, hose it off, no need for high pressure. (No connection to either of the brand names mentioned)