NBW

Hi everyone We are having some work done and moving the kitchen from the front to the side of the property. The builder has suggested to channel out the floor and run the water feed along the study floor and in the ceiling, down to the new location. I have concerns about this. We have UFH downstairs so the cold water will be heated. The UFH will be laid on top so will be extremely expensive if we have a leak I have suggested we wait until the scaffolding comes down and we run the cold water feed outside in 25mm to the utility where we can tee off to where the feeds are required Any other thoughts? Is this the best method to relocate the water? Thanks