How home insulation changed this year

Ask around and you will get a different answer every time, so here is the short version.

What it costs

Nobody is required to explain this to you, which is half the problem. There is a deadline involved, and missing it costs more than the difference.

The exceptions

Nobody is required to explain this to you, which is half the problem. The exceptions matter more than the rule, and there are three of them.

The short answer: check the date, then check the figure, then decide.