Hello, I have a front door leading to an otherwise insulated veranda that I plan to close up. I’m thinking of closing it with z panel on the outside and working my way inward. What should I put inside the panel? Should I have a vapor barrier and if so, where? I will insulate the new section of wall (where the door was). On the interior wall, it will be painted wood paneling. Buggaren
 
To answer the question, one needs to know more about the adjacent walls, dimensions, and detailed design.
 
I thought I'd make it easy on myself and keep the door frame. Partly because it would look ugly to tear it out from the inside. Remove the door and frame the "door hole", put paneling on the outside and it will be the same paneling as the rest of the house. But I want to insulate the new piece of wall and the question is whether something should be placed between the outer panel and the insulation? And between the insulation and the inner wall? It must be able to breathe. On one side of the door, there's a window and on the other side, there's a "regular" outer wall.
 
Since the door opening constitutes such a limited part of the entire wall, it doesn't matter much how you do it. You don't need to think about air gaps or vapor barriers. Apply some form of windproofing on the inside of the outer panel. It can be asphalt paper type AC 350. Finish with the same material on the inside of the insulation before you put on the interior panel.
 
Ok, thanks. So no vapor barriers then?
 
As I wrote, you can ignore it. To know if a vapor barrier is appropriate or inappropriate, you need to account for how the adjacent walls are constructed. That is, what thickness of insulation and of what type is there? Do the surrounding walls have a vapor barrier? However, this is advanced. Asphalt felt of the type AC 350 is vapor-resistant and can always be used.
 
Check and do the same as the rest of the wall is constructed.
 
Thanks, I'll go with that.
 
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