The minimum depth required to mount blind is 1 1/2 inch. The minimum depth required for flush-mounting is 3 inch. Our blinds are crafted with high quality components including high profile steel head rail, quality PVC foam slats, and solid trapezoid bottom rail. Our blinds resist heat and humidity, and are great for all indoor areas including the kitchen, laundry, and bathroom. Installation instructions, a 3 1/4" decorative valance, valance clips, a tilt wand mounting brackets, and screws are included. Valance returns or ending corner valances are NOT included. Mounting screws provided are best for drywall or sheetrock only. They are not for concrete or metal surfaces.