J Top Mount Heavy Duty Bifold Barn Door Hardware Kit | 4 Door One Way

The J top mount heavy duty 4-door one-way bifold kit folds four panels accordion-style along a wall-mounted track, stacking all four to one side of the opening — built for solid-wood panels, oversized doors, and installations where standard duty hardware isn't enough — with no hardware visible on any door face. The J top mount roller attaches to the top edge of each panel, keeping all door faces completely clear while the J-style roller arm remains visible above, maintaining the barn door aesthetic from the side.

J top mount is the only compatible hanger style for 4-door one-way stacks. J-strap hardware mounts to the door face, and in a four-panel stack those front-face assemblies prevent the panels from folding cleanly and can scratch adjacent panels. J top mount keeps all door faces clear for a tight, clean stack.

This is a Goldberg Brothers heavy duty kit, made to order in Colorado with a limited lifetime warranty. Available in all 17 Goldberg Brothers powder coat finishes. One 7 in pull handle is included on the outermost panel. Ships in 10–15 business days. Total system weight capacity is 800 lbs across all four panels. For a fully clear opening, only 10 in of clear wall is needed on the stack side. For lighter panels within the standard duty range, standard duty 4-door one-way hardware is less expensive and fully sufficient.