Create Tight Joints
Always ensure that fasteners penetrate solid framing members. To create a tight joint between the two corner boards, increase the nailing frequency along the outer side of the corner boards. Nail into strapping every 24″ and pre-drill and fasten along the edge every 16″ by pre-drilling holes and inserting stainless steel wood screws. Stainless steel trim-head screws will reduce the possibility of splitting and joint failure. Joints should be glued according to glue manufacturer’s instructions for primed boards. Use high-quality, exterior polyurethane adhesives specifically designed for wood and wood substrates. Caulk wherever siding or other material is in contact with the corner boards.
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