Isover U Protect Slab 4.0 GFR

[Christopherus]

Hey everyone,

I'm currently living in a very small town in Sweden, and can purchase this locally:

Isover Ultimate Protect Slab (04F) | Encon Insulation Ltd - insulation distributor, thermal and acoustic insulation, drywall, fire protection, roofing

(link from a different provider than mine for English)

Its 66kg/m3 mineral wool (roughly 4.1 PCF), which seems OK for what I'm going for (especially since the fluffy option is out for this space), but in the brochure that is downloadable from that link, it says:

Specific airflow resistance: 48 (on page 10, chart on the right side to be exact)

Can someone please explain what this means exactly, and if it's a good or bad choice? I'm having trouble finding other alternatives here in Sweden (suggestions are welcome!)

I'm planning on just straddling corners with 150mm, and building first reflection panels and a cloud at 100mm.

Thanks in advance,

And yes, I have been reading on this forum among others for literally hours, so I apologize if this information was easily found somewhere else. All the web-surfing has made me slow...

EDIT: The Slabs I am looking at are not wired, and the full title is "U Protect Slab 4.0 N"
link to exact product on a Swedish page: http://www.isover.se/produkter/produktvisning?id=22762

[Christopherus]

I sent an email to Isover requesting more information...

From what I can gather, it should be displayed in Pa*s/m ?

And 48 is an extremely low result, as they range from 10Pa*s/m to 10k Pa*s/m...

I am piecing this all together after googling "EN 29053 specific airflow resistance"

I'll post back with their response and then maybe someone can chime in

[Christopherus]

So..


66kg/m3 mineral (stone) wool,

with a 48 Pa s/m air flow resistance.

Which is not air flow resistIVITY, but can anything still be interpreted by this?

I'd appreciate any feedback you might have

Thanks