Vapor Barriers Redux

Subtitle:&nbsp_place_holder;

Are there any risks if you build an exterior wall without an interior polyethylene vapor retarder?

Images:&nbsp_place_holder;

[](http://www.greenbuildingadvisor.com/blogs/dept/qa-spotlight/vapor-barriers-redux)

Few topics in building science seem to have caused as much confusion as the use of a polyethylene vapor barrier in exterior walls.

Once routinely used by builders to prevent the migration of interior moisture into wall cavities, polyethylene is no longer recommended for houses unless they're built in extremely cold climates.

URL: http://www.greenbuildingadvisor.com/blogs/dept/qa-spotlight/vapor-barriers-redux