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Old 08-05-2013, 10:50 PM   #1
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wood wall finishing


hello, im rehabbing an old house its 2x4 construction and I removed the shiplap sheathing on the interior. I plan to reinsulate and cover with 1/2'' osb for shear strength. because I am on a budget, I wondered if: instead of covering 1/2'' osb with a layer of 1/2' gyprock; I could save on material and labour by applying a fire retardant paint or coating such as flamex or using a flame retardant paint additive, than priming and painting the wood walls. I've searched google but I haven't seen or heard of anyone doing this or how it would look.

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Old 08-06-2013, 07:19 AM   #2
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What's on the outside?
Why do you want to "fire proof" the walls?
Why do the walls need to be shear walls?
If you have removed the ship lap, what wood are you talking about painting?
It would be great if you would go back and add your location to your profile for the best answers. Just go to quick links to edit.

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Old 08-06-2013, 01:35 PM   #3
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http://www.treehugger.com/green-arch...d-drywall.html

I would hardly consider OSB a wood product since it has near half or more resins that stink to high heavens than wood. But you can get it fire retarded and of course you can finish it. BIN and then two three layers of clear coat if you want to show it off I guess.

I would not want the look but understand if it works for you, save where blue or greenboard is required, go for it.

Are we talking about the interior or exterior surfaces of this home in the first place. OP, could you clarify your post?

Just has to meet code and it may end up costing you what it does to drywall an interior. We all jumped on the drywall bandwagon years ago because it was cheap and easier than thinking about anything else anymore. There was no reason other materials could not have met code.

I still prefer plywood to osb for lots of reasons outside but have no major issues with the stuff like I do with cheap formaldyhyde laden drywall inside. Just don't get it wet. Any of it of it though whether drywall, plywood or OSB.

Last edited by user1007; 08-06-2013 at 01:42 PM.
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Old 08-06-2013, 05:41 PM   #4
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Was in an Amish home a while ago that had finished OSB. Gotta say the look wasn't for me.
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Old 08-08-2013, 06:30 PM   #5
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What's on the outside?

stucco>>mesh>>building paper>>shiplap

Why do you want to "fire proof" the walls?

as I understand it if you put wood up on the interior, it doesn't have a 15 minute fire rating like d/w does. (it ignites too quickly)

Why do the walls need to be shear walls?

it is a balloon framed 2.5 storey, the shiplap I took down from the interior gives the walls sheer strength, because its so old 80-100yrs old, I feel its sheer strength should be restored. also structural engy said, in passing, that I should put wood on the walls. (only talked with him on phone.)

If you have removed the ship lap, what wood are you talking about painting?

the plywood I will be replacing the interior shiplap with.

It would be great if you would go back and add your location to your profile for the best answers. Just go to quick links to edit.

SK, Canada.

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Not looking to show off the osb or plywood... just want to make it look normal!

Where I live plywood is expensive and osb is cheap, but the strength is comparable.

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Old 08-08-2013, 06:51 PM   #6
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Better check your local code---here, all interior wall must have gypsum board---wood paneling can go on top of it--but all interior walls must have gypsum board or an equivalent fire rated board.
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Old 08-08-2013, 07:23 PM   #7
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I'm just not seeing much of a cost savings doing this.
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Old 08-11-2013, 12:32 AM   #8
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Neither do I Gym and OSB with any kind of finish on it is not a very good look.

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