By virtue of the fact that wood fibre is organic (i.e. poor conductor) and the fact that the fibre is also hollow (i.e. entraps air within its structure), the product is naturally resistant to heat loses through conduction and convection.
The product also has the unique ability to perform better under extreme cold temperature. Specifically, it has been shown that R-values can increase as much as much as 7% under extreme cold conditions whereas fibreglass can lose as much as 21% under the same conditions (ASHRAE “Handbook of Fundamentals”, BNL 50862).
Similarly, cellulose fibre’s basic R-Value is superior to mineral fibre in the higher ambient temperature range and thus makes it a preferred insulation for reducing summer cooling costs. Cellulose fibre maintains an almost constant R-Value over the full range of densities at which it can be installed, whereas mineral fibre products suffer dramatic losses in R-Value as the installed density decreases.