Insulation for ducting

[Moonshine]

We are getting the house boarded this week, and I just had a thought on the insulation of ducts to the exterior.

 

 

Are this usually lagged with something?

[crispy_wafer]

For our MVHR ducts from outside I used some lengths of Domus Easipipe 2 piece insulation with cable ties.

[PeterW]

Yes they need to be or you can get condensation from them especially when then outside temps are below zero.

 

It only needs to be a thin insulation - I saw it done very successfully with the bubblewrap type stuff with aluminium tape over the joints. Can get it in self adhesive too

 

https://www.toolstation.com/search?q=bubble+insulation