Is a vapour barrier needed on single brick wall?

Nik14

Hi everyone 😊

We’re currently renovating a guest room that’s attached to the main house. 3 walls are external, however thy are protected from the rain. They are single brick walls, no insulation, cladding or plasterboard. Just painted on the inside and bare brick for now.

We want to insulate those walls from the inside (R2 insulation) and install plasterboard over it. The big question I’m asking myself is whether we need a vapour barrier or not.

I’ve spent hours seeking information about vapour barriers, unfortunately no luck yet. I’m confident that is going to change now!

Any help is highly appreciated. We live in far North WA, close to the NT border. Dry warm winter, wet and hot summer.

Thank you very much for your support!One of the three external walls

Cheers Nik

EricL

Hello @Nik14 

Welcome to the Bunnings Workshop community. It's sensational to have you join us and thanks for sharing your question about your brick wall.  

It sounds like you'll be building a timber frame inside this room to hold the batts in place. I think installing a vapour barrier is a practical step as the cost of it won't be that significant and it adds a safety barrier for your insulation. But it's advisable to consult with a local building professional. They can provide guidance tailored to your region's requirements and best practices, ensuring that your wall design effectively addresses moisture management and complies with any local regulations or standards.

Let me call on our experienced members @Nailbag and @Dave-1 for their recommendations.

If you need further assistance, please let us know.

Eric