[Greenbuilding] heat treated wood siding

[home-nrg]

Sacie,

1883 means it was old growth or, at worst, second growth
lumber in the original.
If you could find similar to use , heat-treated or no,
now...it would be a shame to even consider using it.

it seems to me that  techniques, such as heat-treating - try
to approximate the durability of old growth lumber. 

I applaud anything which reduces the pressure on what little
of that is left.  if the money is there,it will be logged;
we will be left with only the memory -in a few surviving
buildings.


Bob Klahn

----- Original Message Follows -----
From: Sacie Lambertson <sacie.lambertson at gmail.com>
To: Green Building <greenbuilding at lists.bioenergylists.org>
Subject: Re: [Greenbuilding] heat treated wood siding
Date: Fri, 13 Nov 2015 09:20:58 -0600

> Many thanks for the variety of responses to my query about
> 'heat treating' wood.  I should have been clear I was not
> asking about kiln drying rather to the Scandinavian
> practice of heating the exterior cladding.  John Straube
> responded exactly.  I did not know however, those northern
> houses were painted.  It is the worn gray look I find
> attractive.  Unfortunately I suspect the best wood used
> for the heat treating process is expensive.
> 
> Interesting to me, on the house in question (an addition),
> the original wood siding is intact and in very good shape.
>  Built in 1883, that says something, both to the wood used
> and its care over the years.
> 
> Sacie
> 
> 
> 
> 
> 
> On Thu, Nov 12, 2015 at 7:17 PM, John Straube
> <jfstraube at uwaterloo.ca> wrote:
> 
> > I am assuming Sacie you mean heat treated for cladding,
> > not kiln dried or heat treated to kill bugs for shipping
> > pallets For those who dont know about this process
> > google "heat treated wood cladding” and you can
read
> > about it.  It involves heating to 180-200 C/350-400F or
> > so.  It causes a reduction in ductility, but apparently
> > significantly enhances durability. One technique that is
> > a bit less controlled is to flame treat the wood and
> char it. Some people like the look (e.g. architects) but
> > it is a finicky process and often run off from rain
> > results in significant staining. The controlled
> > Scandinavian process of heat treating results in some
> excellent durable products, especially if it is painted
> > right after (as a lot of this product apparently is).
> > The common method is to heat in an inert gas atmosphere,
> > but I have heard that hot oil is also used and has
> > advantages It seems that it is quite durable, a natural
> pressure treatment. >
> > On Nov 12, 2015, at 4:56 PM, Sacie Lambertson
> > <sacie.lambertson at gmail.com> wrote:
> >
> > > I am interested in this group's opinion about using
> > heat treated wood on the exterior of a house in NE
> > Kansas? >
> > > Thanks, Sacie
> > > _______________________________________________
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> >
> > John F Straube
> > jfstraube at uwaterloo.ca
> > www.JohnStraube.com
> >
> >
> >
> >
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> 
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