Building products giant Boral has more than doubled the surcharge it charges customers for concrete as the fallout from the Middle East war worsens, adding to soaring costs for home builders and the construction industry.

Australia’s second-largest plumbing supplies group, Tradelink, has told customers it will charge 35 per cent more for toilets and toilet seats from June because of sharp rises in raw material costs, and the cost of plastic piping will rise by about one-third.

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