Painting OSB

[driz]

Kilz oil primer followed with a decent quality semi gloss.

We did a tack room in the barn with OSB That’s the way they told us to paint it. No latex primer or paint first coat or it would swell the surface and make it rougher. Took a 5 gallon pail of primer and around 3 paint to do 24x 12 plus ceiling. It came out looking about like a cinderblock or a poured cement wall in the end.


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[driz]

I did not know you could put latex on top of oil based primer. Does latex primer get soaked up too easily?

Latex primer Swells the surface making it fuglier yet. Latex over oil sticks like crazy and feels hard as cement once dry.


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[SkeeterZX200]

Nope, just one coat of Behr Premium plus (interior). I used a little over 10g in my shop.

I did caulk the seams as well.

 

[Earp69]

Nope, just one coat of Behr Premium plus (interior). I used a little over 10g in my shop.

I did caulk the seams as well.

Did you paint the smooth side or rough side?

 

[SkeeterZX200]

Did you paint the smooth side or rough side?

Smooth

 

[GRivera]

Smooth

This may be the hot ticket - What size is your garage?

 

[SkeeterZX200]

This may be the hot ticket - What size is your garage?

It is 30'x60'x14. I used about 64 sheets of plywood.

 

[QwikKotaTx]

This may be the hot ticket - What size is your garage?

It's still not that smooth. It is a lot of work to get it looking nice and if you are that picky I would use sheetrock. Even if you mudded the smooth side there are the occasional chunks of wood that peel off or needs to be scraped off. I had 1 panel that had a huge strip of wood standout and not lay flat. I never noticed it until painted. 4" x 24" section. It's behind a shelf luckily.

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[ncfireman1918]

I’m going through the OSB painting process right now. As of last night, I have 2 coats of Kilz oil-based. I could still see the printing and some of the green edge paint through the first coat of primer, but all of that is covered after the second coat. I’m hoping to get a coat of semi-gloss latex on in the next two days. My plan is just one coat of paint over the two primer coats. Based on how it’s looking now, I think I’ll be happy with the results. I put the “smooth” side out, and am having no issues with primer adhesion. I don’t love the look of OSB, but SWMBO saw the coat difference between that and the plywood that I was planning to use, so I ended up with OSB. I hated the look of bare OSB, but it’s looking pretty good with the paint. I had no intention of hanging and finishing Sheetrock, so that was out. FIL used metal in his shop 55x60, and it looks really nice, but it’s a pain in the *** to hang anything, and I wanted to put a screw wherever I need to hang something.

First coat:

View media item 100956
Second coat:

View media item 101132

 

[Earp69]

Looks good, are you doing anything above the OSB?

 

[GRivera]

Looks good - why the vertical painters tape in some areas?

 

[QwikKotaTx]

The oil based Kilz had a slightly yellow or beige tone to me. I added 2 coats of white semi-gloss and it looked great when wet but a little duller when dry.

I also advise you to mask any areas you want to paint stripes or a different color before adding a top coat as it will stick much better to the Kilz than the latex.

 

[ncfireman1918]

Looks good, are you doing anything above the OSB?

Looks good - why the vertical painters tape in some areas?

Wyattrose69 - I’m not doing anything above the OSB. My primary goal was to protect the insulation from damage, and that should be pretty much limited to the bottom 8ft. I plan to do a ton of work and projects in my shop, so the appearance doesn’t bother me.

GRivera - I wanted to keep my red iron red, so I masked off between sections of wall. I chose to frame inside of the beams, to preserve every inch of floor space that I could. Just my personal preference when I started. Had I known then what I know now, I likely would have bumped the framing out flush with the edges of the posts and would have installed the OSB right over top. It would have made the sheeting go a lot faster.

I agree with QuikKotaTX, once completely dry, the Kilz has a yellowish tint to it. I didn’t realize how much until I started painting semi-gloss white tonight. I just walked back in the house after 2 hours of painting. My head is rocking. Should have cracked a door!

 

[ncfireman1918]

For those who might be thinking about just leaving OSB walls in primer, here’s a quick pic showing the color difference between Kilz and Valspar semi-gloss contractor coat. My walls looked white to me, right up to the point where I started rolling on paint. The difference was immediately obvious. The darker square is Kilz primer.

View media item 101147

 

[mjchamp]

I didn't like the typical OSB painted look. So I put 2 coats of block filler on after the primer. It did a great job of smoothing out the walls.

 

[NUTTSGT]

I'm a big proponent of using Kilz oil based as primer for OSB. 2 coats and top it with something else. The house garage I used an exterior latex as I thought it might be better for the environment.

Don't forget, you need to top coat the Kilz primer or it will yellow after a few years, slowly as you may not notice.

Roll it on , spray it or whatever and get out, that stuff will give you a headache without good ventilation.

 

[QwikKotaTx]

I wore a respirator and had an attic exhaust fan going. It helped some but take breaks to get fresh air. If you get the 5 gallon of Kilz you need a mixing paddle bit for a drill. Took forever with a stick.

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[nadogail]

1. Low Quality paint is not a bargain.
2. Your attention is respectfully invited to Zinser 123, a shellac based primer if you want to get away from water based products.

 

[ncfireman1918]

I wore a respirator and had an attic exhaust fan going. It helped some but take breaks to get fresh air. If you get the 5 gallon of Kilz you need a mixing paddle bit for a drill. Took forever with a stick.

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Yeah it does! Lowe’s put it on the 5 gallon paint shaker for me when I bought it, so it had only had a day or two to settle out before I got started. Have a drill attachment, but was too lazy to walk back to the house to get it. Now my right arm is bigger than my left!

 

[SkeeterZX200]

I am shocked you all are having to put on so much primer. The Behr Premium plus covered in 1 coat with a 3/4" roller.

 

[glider]

I am shocked you all are having to put on so much primer. The Behr Premium plus covered in 1 coat with a 3/4" roller.

I used Behr also on my osb with good results.

 

[QwikKotaTx]

Yeah it does! Lowe’s put it on the 5 gallon paint shaker for me when I bought it, so it had only had a day or two to settle out before I got started. Have a drill attachment, but was too lazy to walk back to the house to get it. Now my right arm is bigger than my left! [emoji38]_hitti

I was mad at myself for not getting that done. I literally had it on the paint counter and the guy never said anything either. I am a pack rat but finally through out a mortar mixing bit I hadn't used in years the week before I bought that paint bucket. So pissed...

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[Lucky13driver]

I did kilts over the osb.Then taped floated the walls and seams then textured with a cheap hopper from HF. Then sprayed kilts again followed by 2 coats of exterior latex semigloss white. It hit the sweet spot for me.

It sounds like a lot of steps but I had it done in three days. And you can tell if it’s sheet rock or not.

 

[jpaw]

Did you lay plastic on floor and paint multiple sheets at once?

Yes, I put down cheap blue tarps and i think i was able to do 10 or so sheets at a time. Put 2 coats of primer on one night and top coated the next.
Man if I could just get that floor space back again.
30x40 fills up fast when you start pulling things out to finally finish the walls.

 

[andyvh1959]

I have used Behr paint inside and outside on my house. Painted the OH garage door and gutters/downspouts with Behr exterior paint 15 years ago and its all holding up very well. I'll use Behr paint over Kilz primer on the OSB in my shop garage. I'd like to do some kind of textured paint on the lower four feet of OSB, and white paint on the upper four feet. I think grey hammered paint on the lower four feet would look good, with glossy white paint above and an orange or red divider band color, but Rustoleum Hammered paint is expensive to do over 340 sq ft of walls.

Anybody use any form of texture additive to the paint applied on OSB? Just wondering if anything added to the paint could make it look more like drywall.

Just to be clear. OSB has "This Side Down" printed on it for rooffing. Same for interior walls. Anyone install OSB on the walls with the rough side exposed?

 

[dcg9381]

I used Behr also on my osb with good results.

Same thing here. Not inexpensive. Takes about one coat, maybe a little touch up - used basic roller.