The present invention is a system and method for manufacturing a framework for a padded cushion in the shape of a kneeler pad, wherein the framework is created using a thermoforming process to make rigid and plastic top and bottom shells that are then coupled together to form a framework to which upholstery is added to thereby form a padded kneeling cushion, wherein a fabric tightening system is also installed in the framework that enables the upholstery to be stretched tighter over the framework in order to tighten the upholstery around the cushion as the upholstery loses its shape and stretches over time, and wherein a system is provided to extend a length of the kneeler pads through the addition of expansion segments in the framework.