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Old 10-26-2021, 05:34 PM   #1
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Cork ceilings or cork insulation layers on the ceiling?

I have seen a few discussions of using cork as a floor material or for floor insulation. That got me thinking about other ways in which this versatile material could be used.


My interest in it stems from its versatility, it straddles the line between a thermal and an acoustic insulator, and it straddles the line between an insulation layer and a final/finish layer or midlayer.


It seems it could be useful for killing a few birds with one stone and solving or at least improving upon some common isssues/problems.


One thing that comes to mind is the issue of figuring out the best way to insulate the ceiling ribs. Furring strips perpendicular to the ribs and extra insulation is one option. But it seems a cork layer could eliminate the need for this with the added benefits of more efficient use of headroom, and a bit of extra acoustic insulation, also possibly easier to work with, with respect to curved surfaces.

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Old 10-26-2021, 07:53 PM   #2
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Interesting! I. Thinking of cork floors so following this
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Old 10-26-2021, 10:29 PM   #3
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You'd save a ton on post-it notes.
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Old 10-26-2021, 10:48 PM   #4
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Seems like there are a few different forms of it, and maybe densities to suit different applications. Its heavier than foam or even mineral wool, but its lighter than plywood or wood. I've never handled it in person but it looks like it would be easy to work with, relatively speaking.
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Old 10-26-2021, 11:19 PM   #5
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Quote:
Originally Posted by musigenesis View Post
You'd save a ton on post-it notes.
But my tack budget will go through the roof 😃
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Old 10-27-2021, 10:07 AM   #6
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Insulating between ribs is better than just dead air.

But any metal protruding from the outside skin into the space, aka thermal bridging will quickly suck all the heat through

Between the ribs is secondary, yes adds R-value in average but cannot do the job alone.

You need your primary insulation layer to be a continuous thickness covering the ribs

along with ideally an unbroken vapour barrier envelope fully sealing the living space, zero air infiltration / convection.

Then add fans vents so the CFM is 100% controlled.

You may need to raise the roof.
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