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jyoung1
LSU Fan
Lafayette
Member since May 2010
1833 posts

Staining/coating pressure treated pine
I’m making an outdoor sofa from pressure treated 2x4. I didn’t want to paint it because i felt it would look worse over rime (I was gonna paint it white).

It will be an outdoor sofa but will be underneath patio covering with only 2-3 hours of sun per day.

What should i use to stain and protect with?

Want to look like this:
Image: https://www.ana-white.com/sites/default/files/18034010_10212479152559063_6610218373153167084_n_0.jpg




Yeahright
LSU Fan
On a big sphere out there.
Member since Sep 2018
1051 posts

re: Staining/coating pressure treated pine
It won't look like that. That is cedar. If you are using pressure treated, I would stain it because stain doesn't chip. However, you need to give the new wood a few months to dry out or the stain won't adhere properly. Good luck.


gumbo2176
Member since May 2018
8422 posts

re: Staining/coating pressure treated pine
quote:

I would stain it because stain doesn't chip.


Agreed, but if he uses treated wood that is still wet, it is going to shrink as it dries and it all depends on how he joined parts as to how wonky it will wind up looking in the end.

I've seen joints open up 1/8 to 3/16 an inch when that wood finally dries out.


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LSUfan20005
LSU Fan
Member since Sep 2012
6790 posts

re: Staining/coating pressure treated pine
Unless against for some reason, just buy Cedar and be done with it.


gumbo2176
Member since May 2018
8422 posts

re: Staining/coating pressure treated pine
quote:

just buy Cedar and be done with it.



Yep. A much better wood for such outdoor projects if you can take the cost of the materials.

It will age naturally and have a nice patina over time and no need for any finish to begin with.


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awestruck
Auburn Fan
Member since Jan 2015
7820 posts

re: Staining/coating pressure treated pine
You ever see stained deck?


(that's what you get)


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southern686
LSU Fan
Narnia
Member since Nov 2015
797 posts

re: Staining/coating pressure treated pine
All suggestions above are good and very true.


FWIW,
I've always used just regular yellow can Minwax stains and once I am done I let dry a day or two then apply a polyurethane over it. Never had an issue with outdoors stuff going this route. However, wood must be dry before doing any of that.


jyoung1
LSU Fan
Lafayette
Member since May 2010
1833 posts

re: Staining/coating pressure treated pine
Ok thanks for all suggestions, i just got pressure treated because I couldn’t find cedar in size i needed at Lowe’s.

It is still a little wet, been about a month since i bought.

So i wait until dry then apply something like these?

Image: https://www.chrislovesjulia.com/wp-content/uploads/2018/01/white-oak.jpg


Image: https://images.homedepot-static.com/productImages/9586fb8d-cb2c-4407-a144-eb99cd45f4dd/svn/exterior-polyurethane-varathane-exterior-wood-sealers-9341h-64_1000.jpg




Bayou
LSU Fan
CenLA
Member since Feb 2005
32397 posts

re: Staining/coating pressure treated pine
Personally, I like the looks of the table in the corner


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jyoung1
LSU Fan
Lafayette
Member since May 2010
1833 posts

re: Staining/coating pressure treated pine
Also current progress:

Hopefully I didn’t mess up too bad by joining/glueing while still wet.

Image: https://i.postimg.cc/YqxZ2Pw5/10-F5-B1-CE-D095-4-BEC-AB8-A-9-E8829-D74-C1-A.jpg



awestruck
Auburn Fan
Member since Jan 2015
7820 posts

re: Staining/coating pressure treated pine
Maybe so.

In my experience PT's going to move around some, shrink, and the joinery likely open up some as it dries. What you got going now is probably ok. But mitered corners and anything laid parallel will open up and widen.


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Schmelly
Chicago Cubs Fan
Member since Jan 2014
11121 posts

re: Staining/coating pressure treated pine
If it’s not gonna be in the rain, why go pressure treated? I’ve built tons of this DIY stuff. Go cheap, get untreated, stain it & if you wanna further protect it, hit it with some spar instead of a regular poly


Schmelly
Chicago Cubs Fan
Member since Jan 2014
11121 posts

re: Staining/coating pressure treated pine
It’s def gonna move. How much is the question. I’ve never used wet wood but my kitchen table was made with regular 2x10s and untreated 4x4s. It’s moved a little, but not enough to split. Just enough to make it look like a shitty job. But It’s about as good as can be expected when you using schrapnel for joinery lol

But, I’d say your margin of error on an outside sofa is larger than a kitchen table. Meaning, it ain’t as big of a deal if it’s not perfect
This post was edited on 12/30 at 2:26 pm


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Schmelly
Chicago Cubs Fan
Member since Jan 2014
11121 posts

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jyoung1
LSU Fan
Lafayette
Member since May 2010
1833 posts

re: Staining/coating pressure treated pine
Yea, hindsight would not have done pressure treated. So I’m good with using regular interior stain and applying some spar urethane over it?


gumbo2176
Member since May 2018
8422 posts

re: Staining/coating pressure treated pine
quote:

Yea, hindsight would not have done pressure treated.


Ideally, using cypress in the correct dimensions would have been a good choice and not much more expensive. Even then I would put some sort of weatherproofing finish on it. Cypress is not what it once was with new growth being not as rot resistant as old growth lumber.

Upper end would be Spanish cedar, then redwood or cedar as an option, but you'd have to fork over $$$ for that lumber.



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Schmelly
Chicago Cubs Fan
Member since Jan 2014
11121 posts

re: Staining/coating pressure treated pine
quote:

Yea, hindsight would not have done pressure treated. So I’m good with using regular interior stain and applying some spar urethane over it?



Yeah, as good as can be with that kinda wood I guess. If it’s not in the weather, you’ll get some years out of it. Spar the shite out of it if it’ll give you peace of mind


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BasilFawlty
Southeastern LA Fan
Baton Rouge, LA
Member since Dec 2014
857 posts
 Online 

re: Staining/coating pressure treated pine
quote:

So I’m good with using regular interior stain and applying some spar urethane over it?


Personally, I wouldn't use an interior stain. Exterior stains exist for a reason. You can spar over an exterior stain.
Bear in mind that anytime a clear is used on an exterior surface, it becomes a maintenance project. You will need to recoat.
This post was edited on 1/6 at 7:55 am


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