Quote:
Originally Posted by 911 Rod
What is a good R-value for a 30 year old house?
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As I said (or didn't make clear) R values can be deceiving and not a good indicator. There are U-values too. An energy audit is the only way to know everything.
You don't have to go full blown (see what I did?) but a pressure test is important if you want to go beyond a physical inspection of everything you can access. Assume if the structure is over 20 year old, especially 30, it is deficient.
What can be done depends on where the biggest losses/gains are. There are tons of informational sites, including government and institutional, to glean info.
High ceilings are getting a bad rap here. High ceilings often mean poor performance. If the ceiling is good energy wise, heat can be managed with circulation.