Waterproofing deck column trim??

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Old 06-07-18, 12:44 PM
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Talking Waterproofing deck column trim??

Hey guys,

Is there any good way to waterproof boxed out deck posts? Every picture I've seen, its done on a waterproof deck.

Imagine wrapping a post like this, but under a deck:

I haven't decided if I'm going flush beam or cantilever on my deck framing, but I do know I want to trim the posts out shaker style. I've done this on many porches, but this is under a deck in Tacoma. 6x6 post to 4x beam.

Is there any way to waterproof it? Make flashing? Or do you just paint all 6 sides and caulk it all for max longevity?
 
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Old 06-07-18, 12:58 PM
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On a deck, you have to plan for that before framing. You put a big square of EPDM down wherever a post will go so that it can drape over the sides of the trim.

In your case, a custom copper flashing might look best.
 
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Old 06-07-18, 01:08 PM
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┐┐┐How would that work with connectors? You use a simpson post to beam bracket and it would be trapped. If you notched the post to beam and lag bolted, it wouldn't work either.
I could just wrap the post top with EPDM, put the bracket on, and trim the whole deal out in PVC?
 
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Old 06-07-18, 05:43 PM
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Easiest way is to use a vinyl, or fiberglass column.
Just an example.
https://meltonclassics.com/products/...porch-columns/
 
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