Every remodeler knows that constructing a short lived wall lined in plastic is a good mud barrier to maintain mud from migrating to other elements of the house. But this is how to do it in a finished room without damaging the surfaces. Wedge strips of R-11 insulation (3-1/2 in. thick) between the framing and the ceiling and the partitions for a mud barrier.

They shall be agency, sound, and of the design and construction to reduce the potential for tripping. Resistance to airflow in major…