Cleaning patio slabs

amberspy

i got Grey Indian sandstone slabs over a year ago ?a large area was put down and love it 
about a 1/4 of it has become slightly green and don’t fancy scrubbing it 🙈🙈
would a chemical like patio magic or pressure washer be ok as looking to buy new washer once outdoor tap get fitted 

Joyce21

I use a pressure washer on my sandstone slabs.

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KT53

Freddies Dad said:

Joyce21 said:

I use a pressure washer on my sandstone slabs.

Me too. Quick and easy with no chemicals.

Me three There's a special brush for cleaning slabs which greatly reduces the mess you would get from just using a conventional lance and spray head.

amberspy

Thanks guys yeah saw the pressure washer with round brush head I take this will help do the job 
does anyone use the soap to or just plain water 

Joyce21

Just water Amberspy.

Lizzie27

We have sandstone paths and steps right round the house but it takes me about 6 hours to clean it all, and I then have to get a hosepipe out to wash all the dirty water away - and re-mortar the cracks between the slabs. What am I doing wrong?

Hostafan1

@Lizzie27, ask a friendly builder, but maybe up the ratio of cement to sand in the mortar mix to make it harder to dislodge.

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Lizzie27

Thanks Hostafan, I was recommended to re-mortar the easy way by brushing the dry ready made mix into the cracks and wait for it to rain - but it didn't! Then tried a watering can but think it wasn't enough. Went back to Patio Magic as I find it easier to apply but it is expensive for lots.

Lyn

The patio attachment is quick and gentle to use.  The jet will remove the cement grouting.