How would one know that all of this insulation by the honored, unnamed competitor, missed sixty percent of the energy savings society wishes? An inspector will not justify risks in the dangerous darkness, or have the time, to find the buried crimes.
Here is approximate math on the missed savings, as a graphical summary, for conduction/ convection through the attic floor:
A sea of poorly-placed insulation would have saved about $130 per year, while correctly placing the same insulation will save a total of $200 per year. The missed savings of $70 per year are less important than those related to diligence, sealing the attic floor. Closing a plumbing vent chase floor pit that exposed 150 sf of walls on three floors, will save $120 per year. The negligent work would have achieved a total $130 per year, only forty percent of the achievable $320 per year, with the same added insulation. Where the installed cost of insulation is only about $800, the savings neglected were hugely significant.
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