Well that's the biggest load of cobblers I have read on this forum for a long time and that's saying something. New builds are rubbish end of. They are put up in a couple of weeks and the materials are so weak that it is a wonder to me that they don't fall down or rot away within a year or two. Give me a well built brick and block older property well insulated etc any day over any new build. The reason stuff falls off the walls and every word that is said by the neighbours is heard is because of the appalling materials and build qualities of new builds.
I've owned several wall detectors unless it's metal close to surface I've found then next door to useless.
On new build the pipework should be in defined zones and aluminium tape been installed behind the pipework.
The 'should ' if things work correctly is covered by pre plaster inspection.
Certainly on sites we have done, for some time N H B C inspection has been very thorough.
You have to take a leap of faith when ever you drill a hole in a wall, unless you built it yourself you never really know if there will be something there that should be.
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