Grade board skirt

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.

What is claimed is:  
     
         1 . 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: 
 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.    
     
     
         2 . The skirt assembly of  claim 1 , the skirt sidewalls having a height dimension that is substantially equal to a height dimension of the side margin of the certain grade board.  
     
     
         3 . The skirt assembly of  claim 1 , the skirt having end openings defined at each of two skirt ends.  
     
     
         4 . The skirt assembly of  claim 1 , the skirt having a ventilation opening disposed opposite the skirt bottom margin and being substantially coextensive with the skirt bottom margin.  
     
     
         5 . The skirt assembly of  claim 1 , the skirt defining a corrosion barrier between the grade board and any ferric material affixed to the grade board.  
     
     
         6 . The skirt assembly of  claim 1 , the substantially water impervious material being readily trimmable for trimming the skirt to a desired length.  
     
     
         7 . The skirt assembly of  claim 1 , the skirt being formed of a plastic material.  
     
     
         8 . The skirt assembly of  claim 7 , the skirt being formed of a polyethylene material.  
     
     
         9 . The skirt assembly of  claim 7 , the skirt being formed with a wall thickness that is between {fraction (1/32)} inch and ¼ inch.  
     
     
         10 . The skirt assembly of  claim 7 , the skirt being formed with a wall thickness that is preferably substantially {fraction (1/16)} inch.  
     
     
         11 . The skirt assembly of  claim 1 , including an insulation channel formed depending from the skirt to receive and position insulation.  
     
     
         12 . A method of isolating 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: 
 forming a skirt with a U-shaped cross section and forming a first and a second sidewall, spacing the sidewalls apart and connecting the sidewalls by a bottom margin, defining an inside dimension that is sufficient to receive the grade board therein by means of the bottom margin, forming the skirt of a substantially water impervious material, and forming a substantially water impervious barrier for a portion of the grade board when the grade board is disposed in the skirt by means of the skirt sidewalls and the skirt bottom.    
     
     
         13 . The method of  claim 12 , including forming the skirt sidewalls with a height dimension that is substantially equal to a height dimension of the side margin of the certain grade board.  
     
     
         14 . The method of  claim 12 , including defining skirt end openings at each of two skirt ends.  
     
     
         15 . The method of  claim 12 , including forming a skirt ventilation opening disposed opposite the skirt bottom margin and substantially coextensive with the skirt bottom margin.  
     
     
         16 . The method of  claim 12 , including defining a corrosion barrier between the grade board and any ferric material affixed to the grade board.  
     
     
         17 . The method of  claim 12 , including forming the substantially water impervious material of a readily trimmable material for trimming the skirt to a desired length.  
     
     
         18 . The method of  claim 12 , including forming the skirt of a plastic material.  
     
     
         19 . The method of  claim 18 , including forming the skirt of a polyethylene material.  
     
     
         20 . The method of  claim 18 , including forming the skirt with a wall thickness that is between {fraction (1/32)} inch and ¼ inch.  
     
     
         21 . The method of  claim 18 , including forming the skirt with a wall thickness that is preferably substantially {fraction (1/16)} inch.  
     
     
         22 . The method of  claim 12 , including forming an insulation channel depending from the skirt to receive and position insulation.