Quote:
Originally Posted by Daox
I'm sure you could convert a conventional house to a passive house, but it would include basically tearing off every outer wall in the place to add more insulation.
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Not necessarily - you just
add another layer of wall to the outside (or inside - but that's probaby harder, and reduces your liveable area).
The Wikipedia page on superinsulation has a section on retrofitting:
Superinsulation - Wikipedia, the free encyclopedia
Quote:
It is possible to retrofit superinsulation to an existing older house. The easiest way is to build new exterior walls that allow more space for insulation. A vapor barrier can be installed on the outside of the original framing.
The cost of a superinsulation retrofit may need to be balanced against the future cost of heating fuel (which can be expected to fluctuate from year to year due to supply problems, natural disasters or geopolitical events).
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