Build ventilation duct behind vapor barrier

[Hasse Persson]

I am going to furnish an uninsulated attic in a newly built house and plan to first insulate the sloped roofs with loose fill. There is an insulated horizontal pipe that leads between the FLVP and the kitchen (I think), see image. Can I "immerse" this pipe in the loose fill behind the vapor barrier or do I need to find a solution that makes this pipe inspectable for the future?
Best regards,
Hasse

 

[Charlotte Andersson]

Yes, you can fill with loose fill insulation. The exception is if there are any cleaning hatches on the ventilation, then these must be accessible.