In the images below are standard concrete to wall transition details created specifically for a pseudo-open joint rainscreen design using Hardie and metal. Notice how the WRB tape is sandwiched between the concrete and the metal and then a sealant fillet bead is placed outboard of the joint. This creates two layers of protection and provides you with a maintainable first line of defence in the form of the sealant joint. This design also creates an airtight joint reducing the possibility of air leakage.

