Knowing what is involved in underfloor insulation (having now done half our house when installing UFH), I am surprised that a GD assessor would think this will meet the so called golden rule. They would have to prove it did. This stinks of the very problems highlighted with GD and the stitch up with GD providers. Goes back to my point about using an independent GD assessor. Problem is, how is a householder to know? Sadly I feel it will take time for the disreputable side of GD to be exposed.