[BLDG-SIM] Infiltration in a frame wall with batts vs Isynene or Airkrete

[David Yuill]

Mike,
 
I carried out a field study in 1996 of whole-house air infiltration.
The study was quite extensive and examined how several different
treatments affect airtightness, but also what contribution the
components of the house (ceiling, walls, windows/doors, floor) make.
The study involved hundreds of tests of overall airtightness and
produced excellent repeatability.  We did not study the products you
mentioned but did look at wet-blown cellulose and blown fiberglass,
among others.  
 
Some of the results are fairly surprising:  the walls accounted for only
14% of leakage, and wall cavity insulation had no measurable effect on
overall tightness of the house.  In one test we removed all of the
insulation from the wall cavity and the overall infiltration increased
1.5%.  Drywall turned out to be the dominant barrier in the wall.
 
The results of the study can be found in the proceedings of the 1997
Excellence in Building Conference of the Energy Efficient Building
Association:
 "A Field Study of Whole House Air Infiltration in Residences", G.K
Yuill, Ph.D, and D.P Yuill, October 7, 1997.
 
I hope this helps.
 
David P. Yuill
Principal
===============
Building Solutions Inc.
2202 S. 60th St
Omaha, NE 68106
402.556.3382
bsiEngineering.com
===============
 
-----Original Message-----
From: postman at gard.com [mailto:postman at gard.com] On Behalf Of Mike
Tillou
Sent: Tuesday, October 19, 2004 9:42 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Infiltration in a frame wall with batts vs Isynene
or Airkrete
 
Hi all, 
I am looking for any research results / papers that have been done on
the infiltration rates of frame walls with insulating batts versus a
product like Isynene or Airkrete that expands to fill the entire cavity.
Has anything like this been published or researched?
Thanks for your help. 
Mike 
 
Michael Tillou, PE
etc Group, Inc.
PO Box 7, Williamstown, MA 01267
ph. (413) 458-9870  fx. (413) 458-9875

  
 
 
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