Hello looking for some advice.
I am going to install dressed cedar lining board onto treated pine battens fixed to brick columns on the outside of main entrance. Cedar is t.g. and will have a sikkens finish. I was going to seal the ends as i install but do I have to do the back also? They will be installed horizontally tongue up. The column will have metal cap on it, and the edges will be sealed maybe with silicone. hows my thinking on this one. thanks in advance.
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that stuff is way too thin for exterior use, IMO.
The only way I would try it would be two coats of finish on both sides first, and then have a solid ply substrate to glue it solidly onto, and then I still wouldn't expect too much out of it. Especially with horizontal joints to trap water
Do your self a favor and get some full 3.4" T&G cedar to do this with, prefinish both sides, and then you can enjoy it for a lifetime.
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I'm just sayin'
I see you're in Australia-don't know if what you use as cedar lining is the same 1/4" red aromatic Juniper we call cedar lining, but if it is Piffin's right-it's too thin, and more importantly, the tongue is too short to stay engaged in the groove of the adjecent board when the humidity level changes. 3/4" red, white, or yellow cedar are all good options, or any kind of lap siding.
didn't notice his location.What I get is GP and about 5/16" which would be 8mm for him?
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It's been a while since I installed it--couldn't remember if it was 1/4" or 3/8". Should have split the difference!
8.128 mm.
Whatever that detail - it is definitely too thin for exterior.
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