Source
r/diynz•
SmartEntityOriginal

Cheapest underfloor Insulation

I've been waiting 2 months for this

https://www.bunnings.co.nz/earthwool-glasswool-r1-5-70mm-x-470mm-x-2700mm-19m-quilted-underfloor-insulation-batt_p8911017

at this point I'm keen for an alternative.

So what is the absolute cheapest underfloor insulation you are aware of?

NOT cost to R-value ratio. Cheapest /m2 is my only goal.

I want to do this as soon as possible. Girl at Mitre10 said they updating the regulations to force higher R-values(?) so just incase she is right I want to get this done ASAP before the regulations change and they phase out all the lower R's

Seems Mitre10 and Bunnings do different brands so the 15% price beat is not a thing?

Posted Jun 19, 2022, 9:24 AM UTC

05
Runehizen•

Are you a landlord per chance

11
Electricpuha420•

Mammoth

3
Mirthgiver•

These changes were announced last November. Honestly, I’m a bit surprised we haven’t seen more on this as they are pretty massive. While NZ really needs more efficient buildings, it’s unfortunate that they come into force this year when building is already so difficult.

1
SmartCourage9010•

FYI (not that it changes things by much) but the regulation changes (in this case the H1 changes) have been pushed out for a further 6 months. As for the cheapest subfloor insulation, I'd just go with whatever decent batt insulation you can get your hands on. Not a fan of the poly insulation, in my opinion any Fibre or wool insulation is far superior. I gather you'll be installing yourself?

1
sidewaysickness•

Have you looked into the government grant? Your house may be eligible for free insulation

1