Exterior Penetrations – Air Sealing – Best Practices
Beyond the big penetrations (like windows and doors and attic hatches), I’d like to hear / see how builders are dealing with the smaller penetrations in the envelope.
Using a can of spray foam is tempting, but I don’t think it’s necessarily the best choice.
How do you effectively seal these?
* Electrical meter base / service panel conduit
* Exterior receptacles
* Vent stacks
* HVAC line sets
* Ventilation hoods
* Hose bibbs
I’ve seen some interesting methods on this site and others. Examples would be use of a DWV roof flashing boot at the attic ceiling level, to seal vent stacks . . . or EDPM sheet rubber for pipe penetrations on exterior walls.
If you have experience building exceptionally tight houses, please share with words or photos.
Here is an example: http://clam-bluehouseblog.blogspot.com/2010/05/air-sealing-details.html
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