Ceiling Insulation

ann7, Apr 16, 11:57pm
For you insulation experts. If I posted a photo of a section of Mammoth ceiling blanket, would you be able to tell me if it is r1.8 or r2.9?
zak410, Apr 17, 12:05am
from their website, R1.8 = 115mm thickness and R2.9 = 185mm (18.5cm)

http://mammoth.co.nz/images/uploads/fact_sheets/CeilingsDatasheet_May2015.pdf
ann7, Apr 17, 6:38am
zak410 wrote:
from their website, R1.8 = 115mm thickness and R2.9 = 185mm (18.5cm)

Here is a photo of the insulation in question. I would say that it is R1.8. Would you agree?
https://trademe.tmcdn.co.nz/photoserver/full/770987997.jpg
tweake, Nov 25, 4:08am
that looks like 1.8.
i have different brand (i think made by the same company) in 1.8 and 2.6 (i think), and its a big difference between them.