NetNews Usenet Archive 1992 #31/NN_1992_31.iso/spool/misc/consumer/house/16121

Text File | 1992-12-28 | 1.9 KB | 38 lines

Newsgroups: misc.consumers.house
Path: sparky!uunet!gatech!asuvax!ennews!mcdphx!fredch
From: [e-mail] (Fred Christiansen)
Subject: high-density insulation?
Message-ID: <[e-mail]>
Sender: [e-mail]
Nntp-Posting-Host: quad4-p3.phx.mcd.mot.com
Organization: Motorola Computer Group, RT Software
Distribution: na
Date: Mon, 28 Dec 1992 19:07:34 GMT
Lines: 25

Typical fiberglass batt insulation for 2x4 walls is R-11 and for 2x6 walls
R-19.  I noticed on the bags of pink stuff which I recently bought and
installed that the dimensions indicated a height ("loft," if you wish)
greater than actual wall depth (3.5" and 5.5", respectively).  There have
been discussions in this newsgroup in the past as to whether you actually
get R-11 or R-19 once the batts get squashed in by sheathing/drywall
(altho I do not recall the final concensus, if any).

Which leads me to two questions:
1) I noticed R-13 insulation for 2x4 walls.  Is the +2 increment in R factor
   actually realized?  If so, anyone know what's different about 'em?
2) CertainTeed claims they have R-15 for 2x4 walls and R-21 for 2x6 walls
   via "High Density" insulation.  Anyone have experience with these?
   Do they work?  Is the cost increase linear to the R-factor increase?

I note that CertainTeed has R-30 and R-38 "HighDensity" batts with less
loft than others, permitting an air space in cathedral ceiling applications.
I also note that they have "sound control" insulation.  I wonder if this
is *really* different that std stuff, or if it is just a rename gimmick so
they can improve their margin.
--
Fred Christiansen, Motorola, 2900 S Diablo Way, Tempe, AZ 85282  "Canajun, eh?"
[e-mail]  ||  uunet!phx.mcd.mot.com!fredch  ||  [phone]
  ".. I have set before you Life and Death, blessing and cursing;  therefore
      choose Life, that both you and your children may live"  Deut 30:19