<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=iso-8859-1" http-equiv=Content-Type>
<META content="MSHTML 5.00.2614.3500" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>I have a question :
<DIV> </DIV>
<DIV>When we draw the relation between insulation in cm and the
thermal resistance obtained we obtain a curve.</DIV>
<DIV> </DIV>
<DIV>For example:</DIV>
<DIV>0 cm insulation > 0 thermal resistance</DIV>
<DIV>5 cm insulation > x thermal resistance </DIV>
<DIV>10cm insulation > 3x thermal resistance </DIV>
<DIV> </DIV>
<DIV>curve starts to slow down...</DIV>
<DIV> </DIV>
<DIV>50 cm insulation > 30x thermal resistance <BR>100 cm insulation > 40x
thermal resistance </DIV>
<DIV> </DIV>
<DIV>So at some point it is as good as useless to increase the insulation
because it hardly adds up to increased performance.</DIV>
<DIV> </DIV>
<DIV>***The the million dollar question is: At what point (R value) do we reach
'enough' insulation?*** </DIV>
<DIV> </DIV>
<DIV>I ask this because other ecological/natural building systems do not offer
R6 (R=m˛.C/W), but I would like to form an idea on at what point we can say it
is well enough insulated. rather that bluntly stating that SB has the best R
value. (a bit like saying a Ferrari can do 300km an hour, when 100 km an hour is
enough)</DIV>
<DIV> </DIV>
<DIV>I know that some other building systems fonction in a different way
(storing the heat or cold in thick high mass walls for instance) but I'm only
looking to the insulation approach here.</DIV>
<DIV> </DIV>
<DIV>Greetings,</DIV>
<DIV>André</DIV></FONT></DIV></BODY></HTML>