[Greenbuilding] Exterior insulation retrofit

JOHN SALMEN terrain at shaw.ca
Tue May 17 08:41:39 PDT 2011


I think it is actually a great system that uses very minimal material to
great benefit. All the proprietary systems incorporate a drainage plane at
this point and though there is still a lot of confusion as to how to flash
things it is improving. The only problems I see are that the drainage plane
is between the sheathing and the insulation so there is some insulation loss
especially if vented at the top. The other concern I have is that the glued
systems specify a gypsum board as the sheathing base which I just don't get.
I like the mechanically fastened systems with drain grooves, or over a
rainscreen detail. 

-----Original Message-----
From: greenbuilding-bounces at lists.bioenergylists.org
[mailto:greenbuilding-bounces at lists.bioenergylists.org] On Behalf Of
Lawrence Lile
Sent: May-17-11 8:11 AM
To: Green Building
Subject: Re: [Greenbuilding] Exterior insulation retrofit

You don't have to use stucco, either.  An exterior layer of foam can go
under essentially any type of siding. I am not a fan of EIFS, because it
traps moisture in the wrong places if not done right.
  
--Lawrence Lile, 


> -----Original Message-----
> From: greenbuilding-bounces at lists.bioenergylists.org
[mailto:greenbuilding-
> bounces at lists.bioenergylists.org] On Behalf Of John Straube
> Sent: Tuesday, May 17, 2011 8:42 AM
> To: Green Building
> Subject: Re: [Greenbuilding] Exterior insulation retrofit
> 
> Being done all the time in North America.  Although this really only got
common in
> the last decade.  I expect to see a lot more.
> The problem is, you have to like the look of stucco, which is not always
what is
> wanted, and the impact resistance of EIFS leaves lots to be desired.
> 
> On 2011-05-17, at 9:27 AM, Norman Feldman wrote:
> 
> > In April I heard an architect describe how they're using EIFS insulation
in
> Germany and Austria to insulate existing buildings from the exterior. They
apply
> EIFS panels to the outside of the building while tenants are in the
building then,
> once the insulation is done, bring the windows out. I will forward more
about this
> offlist if anyone wants.
> >
> > http://en.wikipedia.org/wiki/Exterior_Insulation_Finishing_System
> >
> >
> 
> Dr John Straube, P.Eng.
> Associate Professor
> University of Waterloo
> Dept of Civil Eng. & School of Architecture
> www.buildingscience.com
> 
> 
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