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Old 05-20-2012, 06:41 PM   #1
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Sheathing ID


These old images are all I have to identify this sheathing. The previous owner of the house put it up when he converted the carport to a garage (and now I'm converting it to office space). The rest of the house seems to have used a high quality asphalt coated blackboard.

As shown in the images, the inside of this sheathing is brown. I'm hoping someone recognizes this sheathing and can tell me what something about it and its intended use. Thanks.:

Inside:

Sheathing ID-sheathing-img_7429-edit.jpg

Outside (both sides of garage door, image merged):

Sheathing ID-sheathing-img_743__merged.jpg

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Old 05-20-2012, 07:29 PM   #2
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Sheathing ID


is the core like a wood fiber or like sheetrock?

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Old 05-20-2012, 07:43 PM   #3
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Sheathing ID


Hi Tom. It's fiberous. damaged spots (i.e., spots where a nail head tore through) were able to be picked apart.
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Old 05-20-2012, 07:51 PM   #4
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Sheathing ID


a few companies have and still produce it

maybe this can help

http://inspectapedia.com/structure/F..._Sheathing.htm
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Old 05-20-2012, 08:14 PM   #5
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Sheathing ID


Thanks for the link. It looks rather like Celotex, although I haven't seen any brand name on my limited samples.

Given that this is behind brick, my concern is that the exterior side of the board doesn't seem to be coated to make a good drainage plane, nor is any house wrap used. Fine when it was just a garage, with kraft faced FG and pegboard, but now that I'm creating air-conditioned office space, it's become a concern.

There's nothing I can do about it now, other than tear out the brick and replace the board and add wrap, but that's not going to happen, at least not for a while. I suppose the best I can do now is make sure that the weeping holes are clear and create more in the top of the wall for ventilation. Unless this sheathing repels moisture better than I credit it for?

Thanks for your comments.
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Old 05-20-2012, 09:17 PM   #6
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Sheathing ID


you should be fine

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