A MESSAGE FROM COMMERCE & INSURANCE, SFMO,
MANUFACTURED HOUSING DIVISION
State Director, Jimmy Hightower
Re: Vapor Barrier Installation and Inspection Process
During a recent industry meeting, the proper installation of vapor barriers under homes was discussed. According to HUD 3285.204 (a), a vapor barrier shall cover the ground under the home.
However, in reviewing the placement of a vapor barrier over a perimeter footer, it is the determination of the state, this does not constitute the definition of ground/soil and therefore does not have to be installed where a perimeter footer is present.
BE ADVISED:
-
If the perimeter footer is below grade and soil is used to bring the site under the home to the proper slope, to create the crown, the vapor barrier must go to the edge of the home.
-
Inspections adhering to this memorandum will begin immediately.
Full Reference:
ยง 3285.204 Ground moisture control.
-
(a) Vapor retarder. If the space under the home is to be enclosed with skirting or other materials, a vapor retarder must be installed to cover the ground under the home, unless the home is installed in an arid region with dry soil conditions.
