Fri, 24 May 2013 14:24:15 +0100 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144131#Comment_144131 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144131#Comment_144131 Thu, 26 Apr 2012 12:10:35 +0100 lineweight
I know that treated timber has the green colour when new but my understanding is that this fades with time. For pieces that don't obviously have the green tinge is there an easy way of testing them?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144135#Comment_144135 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144135#Comment_144135 Thu, 26 Apr 2012 12:21:42 +0100 tony http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144140#Comment_144140 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144140#Comment_144140 Thu, 26 Apr 2012 12:32:58 +0100 fostertom Posted By: tonyfeed some to insects see if they die!feed some to yourself see if you die!

Older preservatives prob CCA - copper chrome arsenic, or else creosote (coal-tar extract), both extremely toxic to life incl humans - not stuff you want around the house. So let's hope your old timber is not treated.

If internal, treat now with borate (no more toxic than table salt) but that's no good if it's going to get wet (leaches out). If wet, then various modern preservatives are less-bad that trad ones.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144145#Comment_144145 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144145#Comment_144145 Thu, 26 Apr 2012 13:02:23 +0100 Timber
You can test it, but it can be costly, especially if you don't know what it *might* have been treated with origionally. There are a number of different test types, and so if you don't know what it was treated with (which you obviosuly don't) you may need to have a number of tests done to determine what, if anything, was used.

Most places would charge a fair amount of money (like hundreds (maybe in excess of £1000)) to provide the testing a issue a report.

If it is being used inside, don't bother treating with anything (what is the point). If it is being used outside, then you could apply a brush on treatment. Or if it is important outside timber, just 'recycle' it and buy new.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144154#Comment_144154 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144154#Comment_144154 Thu, 26 Apr 2012 13:41:48 +0100 lineweight
I've been using borate already, where I need to treat stuff.

Seems like there's no way of easily telling so the offcuts will just have to go to the tip.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144156#Comment_144156 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144156#Comment_144156 Thu, 26 Apr 2012 13:48:05 +0100 docmartin This afternoon I am attending an exhibition about a planning application for a Renewable Energy Plant which will use 45,000 tonnes of woodchip from waste wood. This will be 1-2 miles upwind (30% + of the time) of my house. The technology will be old fashioned moving grate, tube boiler and cloth filters.
From the comments,above, it seems that treated wood will find it's way into the feedstock. Is borax still harmless when it has passed through relatively low temperature combustion? Is anyone aware of examples of plants in the UK using ceramic filters? Brian Wilson and Renewablejohn have stated that Continental emission rates are lower than the UK. What technology do they generally employ in newly built plants?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144158#Comment_144158 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144158#Comment_144158 Thu, 26 Apr 2012 14:09:43 +0100 windy lamb Re- treated timber. If it has coal tar/creosote then you'll smell it when you cut it, even if it was treated 30 years ago. If it's the copper chromic arsenic then i'd only use it indoors if you'll never actually come into contact with it (i.e stud partitions, joists) but don't forget about a mask when cutting it! But I don't think you'll be able to tell if it's treated anyway.

If you take either to the "tip" the chances are it will end up with all the other wood and get recycled - usually either burnt in Docmartins power station of ending up in chip/fibreboard.
PS If you've got copper/chromic/arsenic fence posts then use them as fence posts - they'll last forever and you'll never buy better!!]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144160#Comment_144160 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144160#Comment_144160 Thu, 26 Apr 2012 15:12:22 +0100 Nick Parsons http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144162#Comment_144162 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144162#Comment_144162 Thu, 26 Apr 2012 15:29:53 +0100 Joiner
Not a lot of people know that. ]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144180#Comment_144180 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144180#Comment_144180 Thu, 26 Apr 2012 18:13:22 +0100 Timber http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144185#Comment_144185 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144185#Comment_144185 Thu, 26 Apr 2012 18:47:29 +0100 tony http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144222#Comment_144222 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144222#Comment_144222 Fri, 27 Apr 2012 00:19:24 +0100 lineweight Posted By: windy lamb

If you take either to the "tip" the chances are it will end up with all the other wood and get recycled ................. ending up in chip/fibreboard.

Really? I had been under the impression that it is "toxic waste" and can't be recycled. Hence one of the reasons to try and only use treated timber when really necessary.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144238#Comment_144238 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144238#Comment_144238 Fri, 27 Apr 2012 08:55:51 +0100 Joiner http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144251#Comment_144251 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144251#Comment_144251 Fri, 27 Apr 2012 09:44:26 +0100 Timber http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144265#Comment_144265 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144265#Comment_144265 Fri, 27 Apr 2012 11:28:02 +0100 Joiner
Never gave a thought to the implications of the clear treatment, I only know (knew? not sure if they're still doing it) of one place in Shropshire offering it, where we used to take stuff from the mill if a customer asked not to have our normal green CCA treatment, usually on finished joinery - which is not something I'd have risked!]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144279#Comment_144279 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144279#Comment_144279 Fri, 27 Apr 2012 12:31:54 +0100 RobinB http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144281#Comment_144281 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144281#Comment_144281 Fri, 27 Apr 2012 12:51:22 +0100 Joiner
The timber is placed inside the treatment plant (a very big cylinder - ours took three long trucks on rails, pushed into the tank by a tractor). A vacuum is applied (the first "vac") to the tank ...

Tell you what, it's easier just to let someone else explain it... http://www.jcallander.co.uk/timbertreat.shtml

Confusingly, you'll see the term used at the bottom of that page: "Vac/Vac – a treatment principally for internal building timbers and timber frame components."]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144283#Comment_144283 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8994&Focus=144283#Comment_144283 Fri, 27 Apr 2012 12:57:18 +0100 Joiner