How best to get rid of this?
Proprietary cleaners, or just sodium hypochlorite?
Or get a man in?
Got 40-50m² to do, and really it's to tart it up on a house I'm selling, so I'm not overly keen on investing a huge amount of effort, (or expense)
Also the grouting between the slabs is loose in places, so I'm wary of being too gung ho with a pressure washer or a stiff brush...
Proprietary cleaners, or just sodium hypochlorite?
Or get a man in?
Got 40-50m² to do, and really it's to tart it up on a house I'm selling, so I'm not overly keen on investing a huge amount of effort, (or expense)
Also the grouting between the slabs is loose in places, so I'm wary of being too gung ho with a pressure washer or a stiff brush...