Abstract:
A wallboard or drywall system with two types of measuring indicia on on side of the wallboard or drywall, and an integral, transparent vapor barrier is applied to the back side of the wallboard or drywall. In addition, the system contains adhesive coated plastic tape which can be used to seal adjacent, mating edges of wallboard or drywall panels.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates, in general, to a wallboard or drywall system, and, in particular, to a wallboard or drywall system marked with a grid system to facilitate the installation of wallboard or drywall and utilizing two types of vapor barriers 
     DESCRIPTION OF THE PRIOR ART 
     In the prior art various types of wallboard or drywall have been proposed. For example, U.S. Pat. No. 3,798,854 to Hinojosa et al discloses prefinished wall board which has a layer of settable material on one side and a decorative pattern formed in relief in the settable material. 
     U.S. Pat. No. 4,397,123 to Parker discloses drywall board with widthwise extending tear-off strips on the back side of each butt end which allows the butt ends to bend when the strips are removed. 
     U.S. Pat. No. 4,944,124 to Armstrong discloses a panel used for skirting on a mobile home which has a raised masonry surface. 
     U.S. Pat. No. 5,729,934 to Ochoa discloses an L-shaped coping for drywall corners marked with indicia to facilitate the installation. 
     SUMMARY OF THE INVENTION 
     The present invention is directed to a wallboard or drywall system with two types of measuring indicia on on side of the wallboard or drywall, and an integral, transparent vapor barrier is applied to the back side of the wallboard or drywall. In addition, the system contains adhesive coated plastic tape which can be used to seal adjacent, mating edges of wallboard or drywall panels. 
     It is an object of the present invention to provide a new and improvedwallboard or drywall system. 
     It is an object of the present invention to provide a new and improved wallboard or drywall system which has a grid system to facilitate cutting of wallboard or drywall. 
     It is an object of the present invention to providea new and improved wallboard or drywall system which utilizes two types of vapor barriers to protect the drywall from the damaging effects of moisture. 
     These and other objects and advantages of the present invention will be fully apparent from the following description, when taken in connection with the annexed drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a cross-sectional view of the present invention. 
     FIG. 2 is a plan view of the drywall panel of the present invention. 
     FIG. 3 is a plan view of the one of the grid squares used with the grid system of the present invention. 
     FIG. 4 is a plan view of another embodiment of the grid squares used with the grid system of the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring now to the drawings in greater detail, FIG. 1 shows a cross-sectional view of the panel system  1  of the present invention. It comprised a convention drywall or wallboard panel  2 , which can be in any of the standard sizes which are used in the construction of wallboard panels, and is made of any of the conventional wallboard materials. 
     Secured to the back side (i.e. the side of the wallboard that will be closely adjacent the studs to which the wallboard is attached) is a laminated, plastic sheet  3  which is made from any conventional material that is resistant to moisture. The thickness of this sheet  3  can be from 1 mil to 15 mils thick with a thickness of 4 mil being preferred, however, other thicknesses can be used without departing from the scope of the present invention. The plastic sheet  3  is laminated onto the back of the wallboard  2  and covers the entire back surface of the wallboard. The plastic sheet  3  will protect the wallboard and any insulation in the wall from water vapor condensing and destroying the insulation. The addition of this sheet to the wallboard makes it more convenient for construction workers since they will not have to hang a separate vapor barrier during the constructions of internal walls. 
     As shown in FIG. 2, each wallboard panel  2  has a gridwork consisting of vertical lines  5  and horizontal lines  6 . Where the lines  5 ,  6  cross they form a square  8  (see also FIG.  3 ). This gridwork pattern can be printed, or applied by any other conventional method, in any color on the back of the panel  2 . Each of the squares  8  measure one inch on each side, and the total number of squares can vary from 48 by 96 to 48 by 144 depending on the size of the wallboard. Since the squares are one inch on each side, it will be easy and convenient for workers to cut panels without resorting to marking the panels using conventional measuring instruments (tape measure) and pencil or chalk lines. This will minimize the amount of time required to install drywall. It should be noted that the markings are shown as being placed on the panel  2 , however, the markings could instead be placed on the sheet  3 . If the markings are placed on the panel  2 , the sheet  3  should be transparent so the markings will show through the sheet  3 . 
     The dotted lines  7 , in FIG. 2 are marks that represent ½ inch marking cuts. As shown, the dotted lines  7  are only placed on the left-most and bottom square on the panel  3 , however, it should be noted that this is merely for illustrational purposes, and the lines  7  could be placed in all the squares  8 . 
     As shown in FIG. 3, each of the squares  8  is further marked with dimension lines  11 ,  10  along the vertical line  9  and the horizontal line  12 . The mark  10  represents ⅛ inch and the mark  11  represents ¼ inch. Therefore, these additional dimension markings will make it convenient for workers to make accurate cuts which fall in between the  1  inch markings. 
     The FIG. 4 embodiment is similar to the FIG. 3 embodiment except the markings  10 ′,  11 ′ are placed along the edges of the square  8 ′ and not along the lines  9 ,  12 . In all other respects, the markings  10 ′,  11 ′ function in the same manner as the markings  10 ,  11 . Also, it should be noted that the markings  5 ,  6 ,  7 ,  9 ,  10 ,  11  and  12  could be produced in different colors to make it easy for workers to differentiate the different markings when making cuts in the wallboard. 
     As shown in FIG. 1, each panel  2  and sheet  3  will have adhesive coated plastic strips  4  attached to the back sides of the panel. The strips  4  can be any width from 3 to 6 inches and any length. These strips will be placed along at least the edges of the panel  2  that will be adjacent another panel  2 . These strips will act as vapor barriers for the joint between adjacent panels  2 . In addition, the strips could be placed along the top and bottom of the panels if necessary. The strips could be produce in lengths to match the lengths and widths of the panels  2  or they could be produced on rolls and cut to size on the job as the panels are being installed. 
     Although the Gridwall and the method of using the same according to the present invention has been described in the foregoing specification with considerable details, it is to be understood that modifications may be made to the invention which do not exceed the scope of the appended claims and modified forms of the present invention done by others skilled in the art to which the invention pertains will be considered infringements of this invention when those modified forms fall within the claimed scope of this invention.