[Ferro List] Supertherm Insulation

[Janoahsh]

Hi Chris,
You are right of course.  I think the charts and principles are interesting.
There are some comparisons of different materials that might be incorporated
during construction that could help.  I keep coming back to the idea that
white Pigment makes a great radiant reflector.  Simply painting the inside
of a structure with white latex paint is a great energy conservation choice
that comes close to the most expensive radiant barrier.

-----Original Message-----
From: list-bounces at ferrocement.net [mailto:list-bounces at ferrocement.net] On
Behalf Of Christopher Glasspool
Sent: Wednesday, January 02, 2008 10:26 AM
To: list at ferrocement.net
Subject: [Ferro List] Supertherm Insulation

Janoahsh,
What might be misleading is the term 19 RE (R value enhancement). I think
this is thier own term, not a industry standard. I would feel better about
the claims of this insulation if they described it as 90% UV reflective, and
.05 R value or whatever per coating thickness. Some reflective foil claims
give an R value, but that is deceptive as it only applies to heat transfer.
What they don't say, and nobody does is that insulation is a manipulation
that should be managed for the climate you live in. Taking into account
things like the heating and cooling days per year, and the temperature
swings between day and night. You might not want much thermal mass in a high
desert climate - where the need is to cool quickly once the sun is up, and
you may decide not to reflect the suns waves away in a house on the coast of
Alaska. Also in Alaska would be the need to insulate walls, floors, and
ceilings to the same level for best efficiency. 
- chris

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