A roll down movable vertical screen, panel or shutter system (such as used for protecting against insects, solar wind, hurricanes, rain or providing for privacy and security having a bottom edge-weight bar and self-adjusting blade that automatically adjusts to variable pitched surfaces to seal the gap resulting from a roll down screen or shutter's bottom horizontal weight bar and a floor surface that is contoured or pitched in a non-horizontal direction running parallel to the direction of the weight bar. The self-adjusting weight bar for variable pitched surfaces generally including: a weight bar body, a self-adjusting blade, customizable attachment point, variable weights, and anti-warping stiffeners. These elements are to be found as the lowest element of a roll down screen or shutter. The extended elongated weight bar is attached at the bottom edge of a screen and includes a hollow chamber that receives an L-shaped blade that is movably mounted within the hollow chamber so that the blade can conform to the tilt angle or compound contour of the floor.