Cob: Re: FW: Steel Frame?

[Darel Henman]

Yes, insulation on the outside would work.   
I just mentioned it so people were aware of thermal bridging.

A common area missed for example is where the steel joists/posts meet
the ceiling joists and roof rafters.  This area is hard to insulate, and
most heat leaves out the top I have read.  So these perifery areas where
wall meets ceilting meets roof corners.

To add cob in-between steel girders, one should in my opinion prepare
areas for it, for example a wood board attached to the girders to be in
contact with the cob so it can avoid direct contact with steel. 


Darel

"j. gann" wrote:
> 
> Can't the steel become part of the internal thermal
> mass ?  Put the straw(insulation) on the outside.
>  Don't the PAHS buildings use steel frames ??
> 
> --- Darel Henman <henman at it.to-be.co.jp> wrote:
> > And remember even if you use strawbale for
> > insulation the steel will
> > conduct heat out of the house about one thousand
> > (1,000) times faster
> > per unit area than straw will.  This is a thermal
> > bridge and a way to
> > loose lots of heat.  Something needs to stop that
> > thermal bridge from
> > inside to outside.
> >
> > Darel
> >
> > toswink wrote:
> > >
> > > If I understood you correctly that you have a
> > building which is supported by
> > > steel. Then the strawbales are not load bearing
> > but for only insulation. I
> > > would not think there is any problem.
> > >  If you are looking for design tech to help create
> > a plan,then I suggest you
> > > do a web search via google on steel frame houses.
> > > I have a friend who is disabled and he was able to
> > put most of his house up
> > > because it came as a kit drill and screws and a
> > lot of extra feet and hands
> > > :).
> > >  I would think many pre fab mfg would jump on
> > helping you create a
> > > strawbale. It is the wave of the future for sure.
> > >
> >
> 
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