permaculture

[Jen Seamans Blatner & Neil Blatner <nbjsb@SpiritOne.com>]

One concern with putting a vapor barrier *over* insulation is that if 
condensation occurs it will drip onto existing insulation.  Maybe better
to just add extra insulation as opposed to vapor barrier, and make sure
your roof doesn't leak.  Or...

If you have access, install it below insulation.  It is possible to
staple it in wide sheets directly to studs/trusses/ceiling joists - it
will compress behind sheet rock & create a more continuous barrier that
way.  (As opposed to getting narrow pre-cut strips & putting them in
between studs/trusses/ceiling joists.)

Also available under the trade name Reflectix.  If you're doing even a
moderately sized space, we found it easy and inexpensive to buy larger
rolls and cut to size w/utility knife.  


-Jen


On Sun, 2005-01-23 at 09:57, Lisa Rollens wrote:
> This is available, even in the small town I live outside of in MO.  It is 
> foil on 2 sides with bubble wrap in between.  I saw it years ago in Real 
> Goods and thought it would be useful.  It is probably available where you 
> are, somewhere.  The place here is an electrical/plumbing parts store.  It 
> is on rolls, by the foot or roll and about the width you are looking for. 
> They have a small cylinder made out of it on display and you put you hand 
> in 
> it and instantly feel the warm that your hand gives off.  Pretty cool!  Lisa
> 
> 
> ----- Original Message ----- 
> From: "Lawrence F. London, Jr." <lfl@intrex.net>
> To: <permaculture@lists.ibiblio.org>
> Sent: Sunday, January 23, 2005 8:25 AM
> Subject: [permaculture] Energy efficient building: radiant barriers
> 
> 
> > Can anyopne suggest good sources for radiant barrier material, the kind 
> > of 
> > reflective
> > barier that can be installed under roofing and over insulation? Real 
> > Goods 
> > has what looks like
> > very affordable rolls of single-sided foil/kraft/poly material in 48" 
> > width. I would like to
> > find this precut in 22 1/2" width.
> >
> > Thanks for any leads.
> >
> > LL
> > -- 
> > L.F.London
> > lfl@intrex.net
> > http://market-farming.com
> > http://www.ibiblio.org/ecolandtech
> > _______________________________________________
> > permaculture mailing list
> > permaculture@lists.ibiblio.org
> > http://lists.ibiblio.org/mailman/listinfo/permaculture
> > 
> 
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