Hi all, I'm looking at fitting roof sheets and am wondering about the R values.
Sarking has an R value the same as roof blanket, burnings earthwool blanket 1.3/ametalin sarking 1.3.
The blanket is what I believe to be sarking with 55 mms of earthwool glued on so I am scratching my head as to why the same R value????
There is a large price difference between the 2, I imagine the blanket would reduce noise but if they do the same job, I could save money and then put that towards insulating the ceiling with normal batts.
Can anyone she'd more light on this please?