[Greenbuilding] [SB-r-us] Re: Advanced framing/OVE / 100 years from now

[John Salmen]

If your going to copy me copy the whole damm thing.

Nascor is nice but at a price. Kinda like mcdonalds your paying for either
too much or too little thought, depending what side of the street your on. 

The 2x4 scenario was given for contracting conventional builders, the key to
it was not the foam in between the studs but an additional 2" wrap of foam
on the exterior. It's also the stick building approach that uses the least
material of any sort with the best energy. 

Foam ain't straw and straw ain't foam but if you have a building section
that your worried about being compromised by moisture substituting foam for
straw as a core material will work, 99.9% air and 1% styrene monomer (the
bad stuff) by volume.



JOHN SALMEN ENVIRONMENTAL DESIGN
4465 UPHILL RD,. DUNCAN, B.C.  CANADA, V9L 6M7
PH 250 748 7672 FAX 250 748 7612 CELL 250 246 8541
terrain at shaw.ca


-----Original Message-----
From: SB-r-us at yahoogroups.com [mailto:SB-r-us at yahoogroups.com] On Behalf Of
Rob Tom
Sent: March 5, 2007 10:34 AM
To: GB REPP
Cc: SB Yahoos
Subject: [SB-r-us] Re: Advanced framing/OVE / 100 years from now

On Mon, 05 Mar 2007 12:27:44 -0500, John Salmen <terrain at shaw.ca> wrote:

> I have 3.5" thick eps foam factory cut 22.5"x96"  and pressure fit  
> between studs with gaps foam filled. The foam adds a lot of stiffness  
> but is not
> used in the eng. - some redundancy in the structure.
>
>
> The extra engineering comes at a cost

For those who are interested in foamed plastic/wood stud walls, the  
"Nascor II" pre-engineered wall system might be an option.

The Canadian Construction Materials Centre (CCMC ... a branch of the IRC  
(Institute for Research in Construction) at the NRC (National Research  
Centre) evaluation report is available at:

 
http://www.nascor.com/Nascor_dwnloads/wall%20Code%20Reports/CCMCNA~1.PDF

I've never used the stuff but there is an entire subdivision down the road  
(and around the bend) from my home, that was built using the panels.

Instead of the standard 2x4 stud configuration with foam cut to fit  
between the studs a la BCJohn( with the possibility of gaps between the  
foam and the studs/plates in time as a result of wood shrinkage and/or  
distortion ($#!+ happens eh ?)) plus an additional layer of insulating  
sheathing, the Nascor system uses 140mm thick foam with a thermally broken  
composite stud

"Why bother with all this futzing with studs and such when there are  
simpler foam sandwiches around that use less wood (ie OSB-skinned SIPs) ?"  
you might ask.

It appears that the wood studs in the Nascor system are not bonded to the  
foam so presumably deconstruction and re-use/recycling is more easily  
facilitated than would be the case with SIPs ?
I'm also guessing that the Nascor system is more tolerant of moisture  
($#!+ happens eh ?) than steenking gumboard-faced SIPs.

(And if those on the SB List who may be wondering why this was copied to  
that List, perhaps it will provide some thought fodder for the woman who  
was looking for skinning ideas for her salvaged foam dock billets.  All of  
the Nascor panel homes in the aforementioned subdivision were clad in the  
usual non-labour-intensive fashion ... fake wood siding or fake stucco or  
fake brick (ie veneer) Wet-applied plaster is back-breakingly-hard work,  
especially if that person is working alone.)

=== * ===
Rob Tom
Kanata, Ontario, Canada
<A r c h i L o g i c   at  c h a f f y a h o o   dot   c a >
winnow the chaff from my edress in your reply



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