How to add insulation under tin roof?

[karapoti]

Hi. I've a tin roof over the kitchen and dining room (almost flat, maybe 5% slope) and its not insulated and gets pretty hot first thing in the morning, and can stay pretty warm all day ...

I've taken a sheet or two off before to deal with a light fitting, so know there's no insulation and that I can put all the sheets back where they came from using the same holes.

I'm wondering if I need to add some sort of building sheet as well as the insulation, and if there are any regulations that need to be followed. Photo for reference. There's two flat sections that I'd do. The rest of the orignial house has insulation already.

Thanks!

[Jason]

Welcome to the Bunnings Workshop community @karapoti. It’s great to have you join us.

Our resident Bunnings D.I.Y. experts will be back on the site on Boxing Day. Hopefully others will be able to share their thoughts in the meantime.

Jason