Jul 23, 2020 10:41 pm
Does anyone know if there's a major diff. b/n R2 and R2.5 wall insulation. Apparently min. recommended R value in Melbourne is 2.5. But cost saving is significant if I choose to go with R2.0. Is it worth spending the extra money for R2.5 insulation.
Similarly with roof insulation, they reckon R5 minimum for dark roofs. Anyone care to comment based on experience etc.?
Re: Wall insulation2
Jul 24, 2020 11:27 am
Yes that seems to be the recommendation but not sure if it's mandated. Melbourne is in Climate zone 6 but even the biggest name builders only provide R4.0 for roofs and R2.0 for walls. I've seen a couple of smaller builders have R3.5 for their walls.
Re: Wall insulation3
Jul 24, 2020 11:34 am
If you have a dark colour roof (in fact any colour really) I'd opt for sarking under the tiles.
There are a few benefits to that.
Accessible Carpentry & Cabinets
Sign in or Join to reply to this Topic
stonesthrowWall and Ceiling insulation upgradeWall and Ceiling insulation upgrade
I think 4 to 6 there is still a decent amount of gain but beyond that there is no need. Most high performing non-passivehaus (still reasonably affordable) houses I've seen…
Pulsegetting wall insulation 2 storey townhousegetting wall insulation 2 storey townhouse
Is it for road noise? The cavity is continuous and can’t just be filled. Insulation sits in the timber wall frame hence the gyprock all needs to come off. Easiest is to…
ddarrochFoil Faced Building Paper & No Wall Insulation - AdviceFoil Faced Building Paper & No Wall Insulation - Advice
Don't expect builders to go beyond the (very poor) minimum standards. The extremely informative "Your Home" government website, all about sustainable, energy efficient…
John0322Concrete sleeper retaining wall design flushed to brick wallConcrete sleeper retaining wall design flushed to brick wall
Thanks for you reply. I have stormwater lines on my property. The wall we are building will be at the fenceline boundary. The ag lines will run on the neighbour (higher…