You will want to use the same fasteners you would use for installing wood trim and siding. They should be stainless steel or hot dipped galvanized and long enough to penetrate the substrate a minimum of 1-1/2”. For best results, use fasteners designed for wood trim and wood siding. These fasteners have a thinner shank, blunt point, and full round head. Standard nail guns work well with BOTO Trim. If use pneumatic tools, use a fastener with a full round head and set the pressure so the fastener goes just beneath the surface of the BOTO board. IMPORTANT: Staples, brads, and wire nails should never be used. These products have shanks that are too small in diameter to control the thermal expansion and contraction properties of BOTO Trim. For a finished look the Cortex fastening system can be used to reduce the need to field apply paint when the trim is going to be left white.