<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div><div><font class="Apple-style-span" face="Consolas,monospace">Sacie - </font></div><div><font class="Apple-style-span" face="Consolas,monospace">Here is a link to a company here in Canada. If you click on the technology section there are some great resources and explanations there.</font></div><div><font class="Apple-style-span" face="Consolas,monospace"><div><a href="http://www.thermalwoodcanada.com/">http://www.thermalwoodcanada.com/</a></div><div><br></div></font></div><div><font class="Apple-style-span" face="Consolas,monospace">Aaron Stavert, MRAIC</font></div><div><font class="Apple-style-span" face="Consolas,monospace">Open Practice Inc. - Collaborative Architecture</font></div><div><font class="Apple-style-span" face="Consolas,monospace">63 Pownal St. Charlottetown, PE</font></div><div><font class="Apple-style-span" face="Consolas,monospace">C1A 3W2</font></div><div><font class="Apple-style-span" face="Consolas,monospace"><br></font></div><div><font class="Apple-style-span" face="Consolas,monospace">902 370-2086 p</font></div><div><font class="Apple-style-span" face="Consolas,monospace">902 370-2087 f</font></div><div><font class="Apple-style-span" face="Consolas,monospace"><br></font></div><div><font class="Apple-style-span" face="Consolas,monospace"><br></font></div><div><font class="Apple-style-span" face="Consolas,monospace">aaron@openpractice.ca</font></div><div><font class="Apple-style-span" face="Consolas,monospace">openpractice.ca</font></div><div><font class="Apple-style-span" face="Consolas,monospace"><br></font></div><div style="font-family: Consolas, monospace; font-size: 12px; "><br></div></div><div style="font-family: Consolas, monospace; font-size: 12px; "><br></div><div style="font-family: Consolas, monospace; font-size: 12px; ">On 15-11-12 10:23 PM, "John Salmen" <<a href="mailto:terrain@shaw.ca">terrain@shaw.ca</a>> wrote:</div><div style="font-family: Consolas, monospace; font-size: 12px; "><br></div><blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="font-family: Consolas, monospace; font-size: 12px; border-left-color: rgb(181, 196, 223); border-left-width: 5px; border-left-style: solid; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 5px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 5px; "><div>There was some discussion of this 'torrefaction' as a wood preservative</div><div>treatment - there were some french companies involved at the time. Flame</div><div>treating or charring and burnishing of wood surface was a traditional</div><div>Japanese exterior wood technique and I have done that on a few projects (yes</div><div>architecty/finicky) but can be done with some modern tooling and the results</div><div>are stunning. The traditional approach was burning the surface of the wood</div><div>with brazier heated irons and then laboriously burnishing the char off the</div><div>wood. The heating would affect the top 1/4" or so of the wood (similar to</div><div>torrefied) and the burnishing would polish off the sacrificial carbon</div><div>('staining') components and leave the wood with a burnished grey appearance</div><div>that are quite stable both in colour and texture. In reproducing this we</div><div>used large torches and metal and synthetic burnishing (texturing) wheels.</div><div>There are acid treatments (life time/ valhalla) that leave a similar</div><div>appearance. </div><div><br></div><div>Depending where you live the 'elements' will typically take close to a</div><div>century to erode a 1/4" off the surface of raw untreated wood so typically</div><div>wood doesn't need treatment if it has enough sacrificial depth. If the wood</div><div>is finished it is the finishes that need renewal - and often the finishes</div><div>trap moisture (more typical of older oil finishes - less a concern with</div><div>breathable). </div><div><br></div><div>What the burning or acid treatments do is give a natural and neutral aged</div><div>grey finish to wood buildings that otherwise would take quite a while to</div><div>achieve that. After all it took me over 50 years to get that appearance.</div><div><br></div><div><br></div><div><br></div><div>-----Original Message---</div><div>From: Greenbuilding [<a href="mailto:greenbuilding-bounces@lists.bioenergylists.org">mailto:greenbuilding-bounces@lists.bioenergylists.org</a>]</div><div>On Behalf Of John Straube</div><div>Sent: November-12-15 5:17 PM</div><div>To: Green Building</div><div>Subject: Re: [Greenbuilding] heat treated wood siding</div><div><br></div><div>I am assuming Sacie you mean heat treated for cladding, not kiln dried or</div><div>heat treated to kill bugs for shipping pallets For those who dont know about</div><div>this process google "heat treated wood cladding" and you can read about it.</div><div>It involves heating to 180-200 C/350-400F or so. It causes a reduction in</div><div>ductility, but apparently significantly enhances durability. </div><div>One technique that is a bit less controlled is to flame treat the wood and</div><div>char it. Some people like the look (e.g. architects) but it is a finicky</div><div>process and often run off from rain results in significant staining.</div><div>The controlled Scandinavian process of heat treating results in some</div><div>excellent durable products, especially if it is painted right after (as a</div><div>lot of this product apparently is). The common method is to heat in an inert</div><div>gas atmosphere, but I have heard that hot oil is also used and has</div><div>advantages It seems that it is quite durable, a natural pressure treatment. </div><div><br></div><div>On Nov 12, 2015, at 4:56 PM, Sacie Lambertson <<a href="mailto:sacie.lambertson@gmail.com">sacie.lambertson@gmail.com</a>></div><div>wrote:</div><div><br></div><blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;"><div> I am interested in this group's opinion about using heat treated wood on</div></blockquote><div>the exterior of a house in NE Kansas?</div><blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;"><div> </div><div> Thanks, Sacie</div><div> _______________________________________________</div><div> Greenbuilding mailing list</div><div> to Send a Message to the list, use the email address </div><div> <a href="mailto:Greenbuilding@bioenergylists.org">Greenbuilding@bioenergylists.org</a></div><div> </div><div> to UNSUBSCRIBE or Change your List Settings use the web page </div><div> <a href="http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.b">http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.b</a></div><div> ioenergylists.org</div></blockquote><div><br></div><div>John F Straube</div><div><a href="mailto:jfstraube@uwaterloo.ca">jfstraube@uwaterloo.ca</a></div><div>www.JohnStraube.com</div><div><br></div><div><br></div><div><br></div><div><br></div><div>_______________________________________________</div><div>Greenbuilding mailing list</div><div>to Send a Message to the list, use the email address</div><div><a href="mailto:Greenbuilding@bioenergylists.org">Greenbuilding@bioenergylists.org</a></div><div><br></div><div>to UNSUBSCRIBE or Change your List Settings use the web page</div><div><a href="http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioener">http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioener</a></div><div>gylists.org</div><div><br></div><div><br></div><div>_______________________________________________</div><div>Greenbuilding mailing list</div><div>to Send a Message to the list, use the email address</div><div><a href="mailto:Greenbuilding@bioenergylists.org">Greenbuilding@bioenergylists.org</a></div><div><br></div><div>to UNSUBSCRIBE or Change your List Settings use the web page</div><div><a href="http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org">http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org</a></div><div><br></div><div><br></div></blockquote></body></html>