Paul welcome,
Ref thermal Imaging technology, I can see the benefits for establishing where heat loss is coming from and even to a point identifying suspected moisture.
What I'm not sure about if the house builder doesn't fix defects he can see and won't sort, then I can't see them rushing to fix faults he can't see!
You say you have had success with resolution meetings, please expand on how NHBC have used your evidence and how this evidence fits in with how NHBC judges if it falls outside their guidance or not
On this site we like to name house builders you are talking about, it would be useful to know which top directors your technology has brought to the table (given prime time TV programmes have not).
I would imagine this equipment is expensive as well as keeping competent people trained on them, out of curiosity what is the going rate for a Thermal Imagine Inspection?
I can see some use of this technology in older buildings with little or no home insulation to establish where exactly heat loss is coming from (suspect mainly from Windows, roof , wall cavities).
I need some convincing that this type of inspection is required as standard, but I will keep an open mind.