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What if you don't Deck Stain the bottom side of your elevated porch?

Posted on 7/12/25 at 4:28 pm
Posted by deeprig9
Unincorporated Ozora
Member since Sep 2012
72731 posts
Posted on 7/12/25 at 4:28 pm
A contractor told me don't worry about it, not necessary. But I paid him extra to do it anyway, for peace of mind. I don't want to frick with this deck again for as long as I live.

Is it overkill? Pointless?
This post was edited on 7/12/25 at 5:31 pm
Posted by WhyMan
Baton Rouge
Member since Apr 2016
1543 posts
Posted on 7/12/25 at 4:48 pm to
It doesn't matter if you already paid him, useless or not.
Posted by deeprig9
Unincorporated Ozora
Member since Sep 2012
72731 posts
Posted on 7/12/25 at 4:49 pm to
I'm asking whether it was useless or not.
Posted by WhyMan
Baton Rouge
Member since Apr 2016
1543 posts
Posted on 7/12/25 at 4:50 pm to
If it helps you have peace of mind it was worth it.
This post was edited on 7/12/25 at 6:35 pm
Posted by MizunoDude
Member since May 2020
1107 posts
Posted on 7/12/25 at 5:02 pm to
Mandatory for warranty from the mill.

Don’t skip this step unless you like replacing your decking frequently

Posted by deeprig9
Unincorporated Ozora
Member since Sep 2012
72731 posts
Posted on 7/12/25 at 5:31 pm to
quote:

piece of mind


This shite drives me crazy, thanks for pointing it out. Edited.
Posted by WhyMan
Baton Rouge
Member since Apr 2016
1543 posts
Posted on 7/12/25 at 6:35 pm to
You're welcome brother.
Posted by calcotron
Member since Nov 2007
10046 posts
Posted on 7/12/25 at 6:39 pm to
How far off the ground? The closer to the ground the more I would say it helps. I have no data on whether it lasts longer, but I gotta think less stuff getting in over time is better.
Posted by littlebird92
Louisiana
Member since May 2018
310 posts
Posted on 7/12/25 at 7:09 pm to
From a purely aesthetic point of view I think it's a must. It looks unfinished if you don't, but that's just my opinion.
Posted by LSUfan20005
Member since Sep 2012
9120 posts
Posted on 7/12/25 at 8:56 pm to
You’ll need to restain in a few years if it gets any sun.
Posted by lsuwins3
Member since Nov 2008
1853 posts
Posted on 7/12/25 at 10:29 pm to
He didn’t say how high off of the ground it was. Mine is three feet off of the ground, don’t think it gets much sun light or anyone sees the bottom. Don’t think it’s necessary.
Posted by Spankum
Miss-sippi
Member since Jan 2007
60287 posts
Posted on 7/12/25 at 10:40 pm to
I have wondered about this as well. The underside of mine is not stained and has not rotted in the 20 years that I have been living in the house.
Posted by crewdepoo
Hogwarts
Member since Jan 2015
10876 posts
Posted on 7/13/25 at 8:11 am to
Not necessary
Posted by AaronDeTiger
baton rouge
Member since Jun 2014
2158 posts
Posted on 7/13/25 at 11:21 am to
I stained the underside of my trailer boards
Posted by littlebird92
Louisiana
Member since May 2018
310 posts
Posted on 7/13/25 at 12:52 pm to
Well I agree with that. I definitely meant if it's pretty high off the ground to where you can actually see underneath.
Posted by sosaysmorvant
River Parishes, LA
Member since Feb 2008
1459 posts
Posted on 7/13/25 at 1:06 pm to
It will help deter mold/fungal growth. Spray the undersides of the decking with boracare. Decking now a days is total shite. They rot at an alarming rate compared to the wood from the 90's or earlier when chromate treatments were still legal.
Posted by deeprig9
Unincorporated Ozora
Member since Sep 2012
72731 posts
Posted on 7/13/25 at 1:34 pm to
quote:

Spray the undersides of the decking with boracare.


I looked this up.

Damn, for half that price I could just stain it.
Posted by cgrand
HAMMOND
Member since Oct 2009
46207 posts
Posted on 7/14/25 at 12:13 pm to
I didn’t stain underneath mine…it’s elevated from 0’ down to 3.5’ over a slope, it gets plenty of air movement
Posted by TU Rob
Birmingham
Member since Nov 2008
13308 posts
Posted on 7/14/25 at 1:29 pm to
Ours isn't stained, but it is pretty high off the ground. Probably 6 feet at one end, and close to 12 at the other. I spray the underside with Bifen any time I am spraying the yard for mosquitoes. Worry more about termites than rotten wood.
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