Concrete cleaning new

How long should you typically wait on new concrete before surface cleaning.

I just had a patio poured at my house and the cure time is 28 days generally. I just did a quick google search about powerwashing fresh concrete and it was saying generally after the 28 day cure period you SHOULD be good.

1 year.

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I know they shouldn’t but every new home builder here has the garage floor and driveways pressure washed before walk through. No idea how they keep from screwing it up.