Stains on concrete

tinpanalley · 2026-09-25T16:37:41+0100

(This is in France, suburbs of Paris)
We've moved into this building and in several places on the insides of our balcony we have this mould/moss/something staining and I'd like to know what can be done without a power washer to remove the stains. Any thoughts?

Wayners · 2026-09-25T20:03:01+0100

Biocide wash.
Called a soft wash.
Patio magic is one brand I use but there are others

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Stains on concrete

tinpanalley

Wayners

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