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Keeping it short here, I had a bottomless hole which I filled in with expanding foam with no issues. However, under that foam is some wires I wish to add a backbox and cover that with a blanking plate (So, it will act as a wire junction box) but how can I insert a backbox into foam?
I have had two ideas 1, cut a hole and glue the backbox into it or 2, remove the foam and start again but this time was holding the backbox in place as I foam around it.