Lee Ridley

My roofers fitted metal roof sheets ( steel box profile tiles) without the felt underlay. They had timber fitted onto the rafters and metal sheets screwed directly on to them. It looks nice, but I am concerned about the potential leaks and rain noise, too. They said that I don’t have to have the felt as I’ll have kingspan insulation with vapour barrier. The Kingspan insulation will be fitted between the rafters and underneath. Am I right to be concerned, or is it ok to fit it like this?? Can I do anything to improve it now? Appreciate any advice from the roofers with experience in metal roofs. Thank you.