Expertise is simply not enough .. Have my cavity w...

Expertise is simply not enough .. Have my cavity wall full, at least I thought so. After renewing the frames, it turned out that there were very large holes in the insulation, which means 30% fewer insulation values. The Netherlands insulated indicated that they insulated, but could not guarantee that the cavity would be completely filled. Indicated that they could reassure me with heat camera images but they did not. I think I know why not ........