Our patio is on a slight slope and gets all the rain water washing off the garden. It therefore gets very green and dirty and we have been pressure washing it every spring but even this isn't enough. We are also concerned that we are eroding the slabs by doing this. Is there a sealant we could use to avoid all the cleaning? Grateful for any other ideas.
You should never pressure wash a patio as by doing so you remove the top exposing the aggregate and they go green twice as quick you should use a proper cleaner and a scubbing brush for the stubborn marks and you could try ronseal brick sealant but this can make the patio slippery
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