[Greenbuilding] Movable Insulation [ Wall Curtains ]
RT
ArchiLogic at yahoo.ca
Fri Nov 19 18:18:10 CST 2010
On Fri, 19 Nov 2010 11:49:29 -0500, Joe Killian <kaa-ajk at sonic.net> wrote:
> Wall Curtains?
> Way back in the middle ages royalty did that too - Stone castle wall
> insides were covered with tapestries.
Well, way back in the previous millennium, before (my middle ages) we
MooseHugger peons who didn't live in stone castles
used curtains of a sort I suppose.
It was in the form of a 2x4 or 2x3 curtain *wall* (ie non-loadbearing,
studs @ 24" o/c, no lintels or jack studs on openings, single top plate
etc) ... spaced out from a bearing wall with an insulation cavity between
the two, uninterrupted by framing members, plane of the interior air
barrier located at the outside of the bearing wall (ie at least 2/3 of the
total R-value outside of that plane).
This enabled the wall to be insulated to at least 2/3 or it's total
R-value (ie even when only partially insulated, an R-value already
exceeding that of conventional fully-insulated 2x6 walls) while it was
still laying flat on the floor deck... and permitted the plumbers,
electricians, sub-framing carpenters etc to go about their business
without any concerns about their %$@&#*-ing up the integrity of the air
barrier.
[Tapping side of temple with bent forefinger while squinting with one eye]
Way better approach to occupant comfort than those ditzy Middle Aged
Royals, I'd venture. Eh ?
(And not having to wrap the wall in foamed plast-eccchhh! insulation in
order to eliminate thermal bridging at framing members, none of those
persnickety problems of how to fasten exterior cladding to the wall,
cantilevered out on the end of really long fasteners etc.)
--
=== * ===
Rob Tom
Kanata, Ontario, Canada
< A r c h i L o g i c at Y a h o o dot c a >
manually winnow the chaff from my edress if you hit "reply"
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