Airtightness boundary within Build regs drawings

[Post and beam]

I have received my building regs drawings pack and cannot resolve the airtightness boundary from them. I read somewhere here that it should be clearly visible in Red on the drawings. Does anyone know if this is a requirement or just a useful way to do it please?

I can see a VCL indicated but thats not the same thing is it?

Thanks as always 

keith

 

[kandgmitchell]

Well I've never seen the airtightness boundary specifically marked for bldg regs purposes. It'll be useful on site though!

[DevilDamo]

Never seen or needed it to be indicated. Can you not ask your agent/designer to indicate it for your benefit?

Edited November 29, 2023 by DevilDamo

[Post and beam]

I intend to