[Greenbuilding] heat treated wood siding

[Tim Keating]

Hi, Sacie,

I can recommend a few highly-durable, non-old-growth species that are 
great for siding and also what I believe to be the best torrified wood 
on the market (due to very tight tolerances and higher temperatures). 
When it comes to durable old-growth woods, having directed a 
rainforest-conservation group for over 20 years, I can vouch for the 
problem. As alternatives, I supply reclaimed and water-salvaged 
varieties that are actually carbon-positive.

Tim Keating

On 11/13/15 9:46 PM, home-nrg wrote:
> 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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> http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org
>>> John F Straube
>>> jfstraube at uwaterloo.ca
>>> www.JohnStraube.com
>>>
>>>
>>>
>>>
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