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To my mind, the whirlybird should not be in contact with people zones there should be separation In the cold area, NS positioning of thermal elements is important it goes ceiling membrane insulation membrane coldspace whirlybird roof the area you want to keep warm/cool is permanently separated...

Just read this, missed it before, how terrible is the builder if it can't install a whirlybird

I see whirlybirds on vehicles, at 100km/hour two small ones of the dog box can create enough vacuum inside the box to pop the window into the box, out of its rubber, the dog gets a fright, you have to open the vent in the back side too to let air in. Cattle trucks, dog rides in the dog...

I think., the ones shooting, were a little gun happy ( and wrong link ) why bother insulating the ceiling to keep the heat out, if heat in the roof doesn't get in the house Why are there wind catchers, and the equivalent of whirlybirds on houses dating back to settlement & in all the other hot...

when someone quotes, it goes in a quote, you quoted me, now I quoted you I had not quoted you before in this thread I may have quoted you before, in another thread, or other threads, I don't know, I don't keep track. when someone makes an observation, most houses in Sydney have dark tiled...

well double posted, Sorry mods

Ditto all above, I mostly insulate against cold, at r8 to r20 level, without an air barrier wind blows straight through pink batts, r0 sarking ~1 Batts ~3 together : more than the sum of its parts Edit, together is the important thing, the insulation and vapour barrier have to be close...

So many experts say "sarking isnt enough, dont do it. it has a small r value" They leave out how effective a wind break is. In the colder parts, a membrane underfloor and in walls to break the wind