OSB vs. Plywood for Interior Walls in So. Florida - Router Forums
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post #1 of 23 (permalink) Old 07-29-2018, 09:02 AM Thread Starter
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Default OSB vs. Plywood for Interior Walls in So. Florida

Now that I'm retired and back from an Alaskan cruise, I've started to work on putting my 12x18 shed/shop together. Question is whether OSB (cheaper than PW) will work in the So. Florida humidity for interior walls and ceiling. The wall studs and trusses are 2x4 on 16" centers and will be insulated using R-15 faced insulation. It will also have a 1 ton ductless mini-split AC unit and I will also be painting the walls and ceiling.

Thanks in advance for your help.
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post #2 of 23 (permalink) Old 07-29-2018, 09:39 AM
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OSB has a coating on the outside to make it somewhat water resistant. I read that the makers had to do this because the first batches which didn't have it couldn't survive rain which might occur before roofing went on. It should be fine. I put it on the inside of my shop for the same reasons as you. I didn't want drywall because it's too easy to damage. Once painted white it reflects light fairly well. It's more desert like where I am and I have about R38 in top of it and my shop stays cool during the day and warm in winter.
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post #3 of 23 (permalink) Old 07-29-2018, 09:45 AM Thread Starter
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Thanks Chuck. How many coats of primer & paint did you use?
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post #4 of 23 (permalink) Old 07-29-2018, 09:52 AM
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I have OSB on the inside of my 24' x 24' garage/workshop - 2x4 studs, kraft face insulation, 14" blown insulation in the attic - and installed a mini-split about 3 years ago and have had no problems. It keeps the shop cool in the summer and warm in the winter and has been surprisingly inexpensive to operate. The OSB makes it easy to hang things on the wall, although I still looks for studs if it's something heavy.

I guess that I should paint the walls one of these days to brighten things up......................
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post #5 of 23 (permalink) Old 07-29-2018, 10:00 AM Thread Starter
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Thanks Tom. It may be that OSB is the way to go. It's about $350 for the 1/2" OSB and $515 15/32" PW. Saves me ~$150 that I can use for insulation, paint, or tools.
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post #6 of 23 (permalink) Old 07-29-2018, 12:09 PM
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I think I just used a paint that didn't need a primer and a medium or long nap roller and 2 coats. Like Tom said, you get the added benefit of being able to hang a lot of stuff. I still put in sections of pegboard and painted it white too. It's way easier to find a lot of tools that way. Good for things like small squares, saws, hammers, and with the right holders things like chisels and screwdrivers. For long stuff like levels and yardsticks it's finishing nails in the OSB.

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post #7 of 23 (permalink) Old 07-29-2018, 12:56 PM
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Quote:
Originally Posted by OBG65 View Post
Thanks Tom. It may be that OSB is the way to go. It's about $350 for the 1/2" OSB and $515 15/32" PW. Saves me ~$150 that I can use for insulation, paint, or tools.
Like Tom I used OSB and didn't paint it. Not painting it saved money and didn't hurt lighting much. I am talking about the shop I used to have and wish I had back. Oh well I guess that is life.

Don in Murfreesboro,Tn.

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post #8 of 23 (permalink) Old 07-29-2018, 01:35 PM
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I say find the shiniest white you can find, and put on at least 2 coats. Paint it all, walls, ceiling, floor. Before you put any shelves, or whatever in, and I would paint them too. You will be amazed at how bright it makes the shop, but it will dim down as you put tools and all in, and sawdust gets on the walls.
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post #9 of 23 (permalink) Old 07-29-2018, 01:38 PM
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I’m going to use osb , but as I think Tom mentioned once, paint it prior to hanging it . Thought that was a great idea
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I donít always insulate , but when I do .
Ok ,I never insulate
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post #10 of 23 (permalink) Old 07-29-2018, 02:48 PM
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When I insulated by shed shop and office walls, I began by laying in that aluminized radiant barrier. The insulation went on top of that. I was surpirsed when we did the garage that the radiant barrier reduced roofing temperatlure by about 35 degrees. It only has an R rating of 4, but turning the infrared heat away is worth the effort to lay it in. I bought 4 ft wide rolls and cut them to fit between the studs. I also installed them between the ceiling joists, whice were not evenly spaced. Put R13 paper backed glass in next, then a 2 inch thick foam cut to fit precisely between the ceiling joists and held in place by finish nails hammered into the joists. No other covering on the ceiling. Walls are covered with a mix of ply and one whole 24 ft wall is covered in 1/4 inch pegboard. Never bothered with drywall in the shop. Stays warm in winter, but takes an hour to heat up when really cold. Small room AC cools nicely during summer here in the desert. I never painted the shops, just installed a lot of LED lighting

The more I do, the less I accomplish.
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