Knee walls are short, vertical partitions that separate a finished attic space from the unconditioned space behind them. With improper insulation, these walls become a significant source of heat ...

As you’ve observed, one of the main problems is improper insulation of the area between the rafters in the small knee wall attic spaces. This is the primary area of concern in your home ...

However, two other types of attic doors that you might have in your home are vertical knee-wall access doors or spring-loaded ...

Knee walls need to be insulated more than regular walls and have a solid air barrier on the attic side. Wall insulation needs a separate air seal to work properly, and when you have that 150-plus ...

What are your thoughts? Also, how important is blowing insulation into the walls vs. things like insulating the attic? Is it worth my doing it for the second floor if my downstairs neighbors don ...