Green Building Forum - Exterior treatment for plywood Tue, 19 Dec 2023 07:58:26 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265368#Comment_265368 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265368#Comment_265368 Fri, 02 Feb 2018 16:30:28 +0000 Doubting_Thomas
However, I'm aware that I need to treat the ply with something to make it properly 'external grade' as the marine spec just refers to the glues.

Some online research has suggested something called Butinox but the best grade appears to have been discontinued (I guess due to the solvents involved). I'm also wary of using anything oil-based that my window installers will need to stick their membranes onto as I'm guessing the glues won't be warrantied for that kind of substrate.

How have others using the ply approach finished their timber?

n.b. The ply will be fully concealed by internal and external reveal boards and sill, so appearance is not my priority. I just want something that will preserve the wood from moisture (and in the event of a leak) and that the pro clima tapes will stick to well.

Thanks in advance.]]> Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265370#Comment_265370 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265370#Comment_265370 Fri, 02 Feb 2018 16:35:41 +0000 borpin Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265374#Comment_265374 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265374#Comment_265374 Fri, 02 Feb 2018 17:08:11 +0000 MikC Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265385#Comment_265385 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265385#Comment_265385 Fri, 02 Feb 2018 21:37:22 +0000 djh
If there's any difficulty sticking the tapes to the wood, then the first step is to use the RP primer on the wood and if that isn't enough, you can always see if some Orcon-F will stick to the primer.]]> Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265407#Comment_265407 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265407#Comment_265407 Sat, 03 Feb 2018 12:06:44 +0000 fostertom
Apart from water leakage, from aged, damaged or faulty-installed flashings, these are in the poss danger zone from interstitial condensation by permeation and/or air-leak borne.]]> Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265422#Comment_265422 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265422#Comment_265422 Sat, 03 Feb 2018 18:47:34 +0000 MikC
The main benefits of ply is its so nice to work with. Not sure cement type boards are quite so easy to glue and screw for example.]]> Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265426#Comment_265426 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265426#Comment_265426 Sat, 03 Feb 2018 20:37:14 +0000 djh Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265435#Comment_265435 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265435#Comment_265435 Sun, 04 Feb 2018 08:25:34 +0000 Nick Parsons Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265508#Comment_265508 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265508#Comment_265508 Tue, 06 Feb 2018 19:03:30 +0000 borpin Posted By: djhTimber window frames are secured to timber studwork. Why are we worried that the connection is timber?Agreed.

Posted By: Nick ParsonsSupalux was (is?) very expensive and very brittle. Not the easiest thing to work with.
And not particularly strong in this context I'd suggest.]]> Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265509#Comment_265509 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265509#Comment_265509 Tue, 06 Feb 2018 19:04:37 +0000 borpin Posted By: fostertomPerhaps we shd use somthing other than wood-based, for these 'picture frames'?Hardly a picture frame. My windows are wood. Is that a problem too?]]> Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265889#Comment_265889 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265889#Comment_265889 Thu, 15 Feb 2018 16:39:10 +0000 Doubting_Thomas
Not overly keen on the idea of covering my house in solvent based products, but it does appear to keep the ply fairly sound for much longer than a standard paint might. Since I'll be boarding over my window surrounds the lack of repainting certainly appeals.

Anyone used epoxy or something similar in this way? Anything to watch out for, other than using a decent respirator when applying?]]> Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265893#Comment_265893 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265893#Comment_265893 Thu, 15 Feb 2018 17:29:58 +0000 goodevans Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265998#Comment_265998 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=265998#Comment_265998 Mon, 19 Feb 2018 11:46:50 +0000 ringi Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=266013#Comment_266013 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=266013#Comment_266013 Mon, 19 Feb 2018 19:53:42 +0000 borpin Posted By: ringiRemember it will stop the ply from "breathing", therefore increasing the risk of condensation from behind.As the ply is perpendicular to the structure this is hardly an issue.]]> Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=266014#Comment_266014 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=266014#Comment_266014 Mon, 19 Feb 2018 20:38:25 +0000 djh Posted By: borpin
Posted By: ringiRemember it will stop the ply from "breathing", therefore increasing the risk of condensation from behind.
As the ply is perpendicular to the structure this is hardly an issue.
It still has an inside and an outside.]]> Exterior treatment for plywood http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=266018#Comment_266018 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15548&Focus=266018#Comment_266018 Tue, 20 Feb 2018 11:49:13 +0000 goodevans