[Greenbuilding] [BULK] Re: Insulation

Mon Nov 5 17:52:57 EST 2007

I've blown cellulose from both sides.  The outside keeps the mess out of
the house, but they are right there is no way to fix the holes so they
look right, with any kind of siding or stucco.  Holes on the inside are
easier to patch if you are working with sheetrock or plaster, but the
job makes a bigger mess inside.  

Whatever you do, turn off the power to the building, you are sawing into
the walls blind.  And check for blocking in the walls.  A super way to
do that is to wait for a good cold day and take a thermal image of house
before you sign off on the insulation job - you'll likely find some
voids.  Sometimes utilitys or citys will allow you to use a thermal
imaging camera.  

A really slick job would be to drill the holes from the outside, then
wrap the building in 1-1/2" of foam, then re-side it.  Maybe not a great
idea with existing exterior stucco, but it works real well over old wood
siding.  

Lawrence Lile, PE, LEED AP
Project Solutions Engineering

-----Original Message-----
From: greenbuilding-bounces at listserv.repp.org
[mailto:greenbuilding-bounces at listserv.repp.org] On Behalf Of Tim Vireo
Keating
Sent: Saturday, November 03, 2007 8:46 PM
To: Kathy Cochran; 'Corwyn'; 'Greenbuilder list'
Subject: [BULK] Re: [Greenbuilding] Insulation
Importance: Low

Someone I know did make holes from the inside. Also, make sure there 
are no blocks within the wall that may prevent the insulation from 
spreading out. It seems best when applied to walls where one has 
recently applied sheet rock, since then one is able to know where any 
potential blocking is.

tim keating

At 6:05 PM -0700 11/2/07, Kathy Cochran wrote:
>I am getting ready to insulate the old 1940's house with blown-in
cellulose.
>The exterior is stucco.  I have been advised by ALL THREE stucco
bidders
>that the holes should be punched from the INSIDE, because they will
NEVER be
>invisible from the outside, but with spackle / plaster interior
patching
>they will be.  Just FYI.  If anyone has any other experience with this,
and
>any different results, I would be delighted to hear from you.
>
>Regards to all,
>
>Kathy of kathys_old_house at goldrush.com
>
>
>
>-----Original Message-----
>From: greenbuilding-bounces at listserv.repp.org
>[mailto:greenbuilding-bounces at listserv.repp.org] On Behalf Of Corwyn
>Sent: Friday, November 02, 2007 3:41 PM
>To: Greenbuilder list
>Subject: Re: [Greenbuilding] Insulation
>
>On Nov 01, 2007, at 21:56, Tim Vireo Keating wrote:
>
>>  I have heard that the blown-in cellulose (recycled newsprint) is the
>>  best insulation when doing a medium-sized job on exterior walls.
What
>>  do folks on the list think? I'm thinking or recommending cotton
(blue
>>  jean) insulation for interior walls and perhaps exterior walls for
>>  smaller areas.
>
>I think 'best' is always situational.
>
>That said, I like blown-in insulation for many exterior wall
>applications.  Crack filling and full coverage are two advantages. 
>Batts are good for places where you aren't worrying about infiltration.
>   I suspect that both being cellulose they perform about the same when
>applied well.
>
>I have often wondered if I could shred old clothes sufficiently to make
>blown-in insulation out of it.  Get all of Goodwill, Salvation Army,
>Rummage sale, leftovers and use it to again keep people warm.
>
>Thank You Kindly,
>
>Corwyn
>
>
>--
>Corwyn
>Kermit didn't know the half of it...
>http://www.greenfret.com/
>corwyn at greenfret.com
>
>
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