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What is the R-Value of Canec

Andrew808 | Posted in General Questions on


We have a 1961 home in Hawaii and it has a low slope (2:12) roof with ~ 2″ of canec on top of an open beam ceiling.

Canec is the common name for a fiberboard building material that was made from sugar cane bagasse — fact sheet attached.

Question — What is the R-Value of the canec?

We plan to remove all Canec and reroof.  We want to ensure our roofer’s proposed plan at least meets this R-Value.

Thank you,

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  1. Jon_R | | #1

    Don't know specifically, but probably similar to other fiber boards at R5 or R6 per 2".

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