[Greenbuilding] Thin High R-value insulation for exterior

[Beatrice Dohrn]

I just saw this post as I've been away.  I kinda think you're nuts to give up 
the terrific assets (Breathability,  ability to plaster right on and have 
terrific hold) of a Durisol house but if you're determined to do so,  I would 
consider adding it on the inside and then sheetrock over.  This seems to me 
maintain the most that you can of the positive qualities of the block.  


G'luck!

 Beatrice Dohrn





________________________________
From: Lynelle Hamilton <lynelle at lahamilton.com>
To: greenbuilding at lists.bioenergylists.org
Sent: Sat, October 30, 2010 5:28:38 AM
Subject: [Greenbuilding] Thin High R-value insulation for exterior

Hi All:

Again, I turn to this list for advice.

My house is durisol block, but I want to add 12-15R insulation to the exterior, 
in part to reduce heat loss from the webs of the block, and partially because I 
want R40-R43 walls.

I have reclaimed 3" SM Board (blue EPS)  to put on the outside of the durisol.

The facing is manufactured stone.  I have had 3 masons look at the property.  
One mason says no problem attaching the stone to the durisol through the 3" EPS, 
the other two say well.,....can't you find something else?   They point to the 
possibility that the screws needed will bend in the EPS, allowing the block to 
sag.

Both say spray on closed cell insulation provides too uneven a surface to attach 
lath and stone.

So, has anyone done what I'm doing? What was the result? Alternately, does 
anyone know of anything with grater rigidity than the EPS, perhaps with higher 
R-value per inch, that would work?

Please don't point me to the engineer....he says this is out of his scope.

Many, many thanks!

Lynelle
-- Effective immediately, please use the following e-mail address to reach me: 
lynelle at lahamilton.com

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