Abstract: A skirt assembly for use with a certain grade board, the grade board having a bottom margin and two spaced apart side walls and having a width dimension, the skirt assembly comprising includes a skirt having a U-shaped cross section and being formed of a first and a second sidewalls, the sidewalls being spaced apart and connected by a bottom margin, the bottom margin defining an inside dimension that is sufficient to receive the grade board therein, the skirt being formed of a substantially water impervious material, the skirt sidewalls and the skirt bottom forming a substantially water impervious barrier for a portion of the grade board when the grade board is disposed in the skirt. A method of isolating a grade board is also included.

Abstract: A post frame building utilizing wood support posts having bottom portion of the posts sunken into the ground. An encapsulating sleeve for each underground portion of the posts providing a positive barrier against deterioration by ground contact. The sleeve may be trimmed at ground level or higher as desired.