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Old 07-06-2008, 04:48 PM   #1
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Preparing 5/16" cedar planks


I've got some 5/16" cedar planks that I'm going to use as the ceiling of my front porch. It's a small entry way area 40 x 96" and it's open to the weather but the ceiling should not get wet.
What should I do to prepare the planks? Do I need to coat both sides with a weather sealer?

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Old 07-07-2008, 08:15 AM   #2
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Preparing 5/16" cedar planks


I have a great regard for cedar, but I think you might not be completely satisfied using those planks in that application over the long haul. Even if you seal the wood on all 6 sides/ends - which you should do - there will still be seasonal movement, and unless you provide some means of providing for that movement, you will end up with gaps. In addition, I believe the planks will be prone to cupping from the difference in moisture absorbtion between the exposed face and the face against the ceiling (assuming you are installing these on an existing ceiling surface, and not just to the joists above.)
If a client wanted their ceiling done with your material, I would discourage it and try and persude them to use a standard material thickness (1/2 or 3/4") with a tongue/groove joint. This would provide a secure joint that would allow some movement without allowing obvious gaps, as well as allow blind nailing, as opposed to face nailing, which you have to do with your planks.
Hope this helps

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Old 07-07-2008, 09:30 AM   #3
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Preparing 5/16" cedar planks


Thanks Renovator.
These are T&G planks. Granted they it's a very small T&G.
I was planning on gluing and blind nailing to the rafters using 1 1/4" brads.
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Old 07-07-2008, 09:57 AM   #4
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Preparing 5/16" cedar planks


Then you should have no problem.
Finish the perimeter with a bed or cove molding to hide gaps (set the planks ~1/4" from edges to allow for expansion).
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