[Greenbuilding] [BULK] Re: Window insulation/installation

[Lawrence Lile]

What you are talking about is called "Advanced framing"  It is not that
new, but it is hard to get carpenters to change their ways.  

Advanced framing uses substantially less wood and provides substantially
more insulation.  

Here is a good link on advanced framing details:

 http://www.eere.energy.gov/buildings/info/documents/pdfs/26449.pdf
 
Lawrence Lile, P.E., LEED AP


-----Original Message-----
From: greenbuilding-bounces at listserv.repp.org
[mailto:greenbuilding-bounces at listserv.repp.org] On Behalf Of Thomas
Lewis
Sent: Wednesday, February 28, 2007 5:36 PM
To: Greenbuilder list
Subject: [BULK] Re: [Greenbuilding] Window insulation/installation
Importance: Low

hey all, 

two 'green' homes (to be leed cert) I've recently
worked on did not have trimmers for the most part,
just king studs with sill and head for the window ro. 
Headers that need to transfer load were hung on king
studs with metal brackets and or had unique framing
assemblies where the header ran beyond the ro on each
side of the window.  turning the king studs around the
window to trimmers

I assumed this was a new 'standard' in material
efficient framing and am a little surprised to find
you guys talking about trimmers. 
 
Is this just a personal preferance for most of you
(want the nailing area for trim) or is it off the wall
to frame as I've described?
  
we've used grace's vycor for our window flashing.  we
wrapped the sides and bottom keeping vycor on framing
and sheething under the house wrap, then installed
window, then a strip of vycor along the head of the
window tucked under the housewrap and covering the
window flange.  housewrap goes over the window flanges
and gets taped.  if that's confusing at all just try
to picture the drainage plane and you'll get it.
sound good?


tl

 
--- Bruce Donelson <abetterbuilder at frontiernet.net>
wrote:

> 
> Also, the contractor with whom we have been working
> has recommended that
> we install the windows flush against blind stops
> (our siding isn't ready
> yet) and flash with something called Vicor, which is
> evidently glue
> (peel and stick) on a rubbery membrane.  I haven't
> found much
> information about Vicor on the web.  Are there any
> recommendations or
> oppositions to this method?
> 
> thanks
> 
> Vicor would be fine on the sides and top. I like to
> use Flexwrap for the
> bottom of the window, because I can run it up the
> sides a few inches. This
> provides a pan flashing on the bottom.The stuff is
> expensive, about $150 per
> roll, so I wouldn't use it all over.
> 
> Bruce Donelson
> A Better Builder
> 
> 
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"Time makes more converts than reason."  Thomas Paine, Common Sense


 
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