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OT: 6x6 fir posts

loco_engr
loco_engr Posts: 5,801
in EggHead Forum
my daughters house has these 6x6 posts supporting 2 different stair cases and I was wondering if because
of the cracks, should I try to seal them?

aka marysvilleksegghead
Lrg 2008
mini 2009
XL 2021 (sold 8/24/23)
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Comments

  • nolaegghead
    nolaegghead Posts: 42,109
    I have had this same issue.  Search for "post caps".  You'll need the one for 6" posts which is actually 5.5x5.5". 

    You can also fill them in but you need to seal it otherwise the putty or whatever will just trap the moisture. 

    Bondo or wood putty can fill in the cracks, but you need to paint a thick layer of some sealant that can handle the sun and heat, and expansion and contraction of the wood.  Elastomeric paint or spar urethane.  Roofing tar would be best. 

    Get the caps.
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  • fishlessman
    fishlessman Posts: 33,685
    its not really a structural issue, fir will do that and still last a very long time. i would get the caps if its an appearance issue. my deck is probably 40 years old or older and the fir posts have never been treated, painted, or anything
    fukahwee maine

    you can lead a fish to water but you can not make him drink it
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  • nolaegghead
    nolaegghead Posts: 42,109
    fishlessman said:
    its not really a structural issue, fir will do that and still last a very long time. i would get the caps if its an appearance issue. my deck is probably 40 years old or older and the fir posts have never been treated, painted, or anything
    Maybe not a structural issue in New England but we have an entirely different collection of flora and fauna in the deep south.  I have some fir 4x4 that I had encapsulated in paint.  Water did some major damage.

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  • nolaegghead
    nolaegghead Posts: 42,109
    Not sure where Kansas falls on that environmental spectrum that degrades wood.
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  • fishlessman
    fishlessman Posts: 33,685
    nolaegghead said:
    fishlessman said:
    its not really a structural issue, fir will do that and still last a very long time. i would get the caps if its an appearance issue. my deck is probably 40 years old or older and the fir posts have never been treated, painted, or anything
    Maybe not a structural issue in New England but we have an entirely different collection of flora and fauna in the deep south.  I have some fir 4x4 that I had encapsulated in paint.  Water did some major damage.


    its even holding up on my floating docks
    fukahwee maine

    you can lead a fish to water but you can not make him drink it
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  • WeberWho
    WeberWho Posts: 11,342
    nolaegghead said:
    Not sure where Kansas falls on that environmental spectrum that degrades wood.

    "The pig is an amazing animal. You feed a pig an apple and it makes bacon. Let's see Michael Phelps do that" - Jim Gaffigan

    Minnesota
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