How to seal windows from exterior for water and air seal but not vapour seal?

Piyush Prince Published: Nov. 7, 2018, 12:10 a.m.Last updated: Nov. 9, 2018, 10:11 a.m.

I am following your technique to seal the windows from inside that is to use Rockwool to insulate the gap and tape for water, air and vapour barrier. I am concern that taping it outside might cause the vapour sandwich which I want to avoid. I am not sure what you have done for 2015 model home for exterior.

Your help on this is highly appreciated.

Thank you.

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