TechBoard and TechPanels can be finished to most any client specifications. For the exterior a water/vapour barrier is usually required (as with conventional materials). For the interior, TechBoard is rigid but can be painted and finished following the manufacturer recommended prepping which includes priming the surface of the TechBoard, and taping and mudding the joints. With a traditional skim coat, you can easily achieve a level 4 finish.
TechBoard makes an excellent substrate to handle tiles, wallpaper or other interior finishes such as TechBrick.(link to TechBrick info?). TechBoard is also certified as a backer board and can handle up to 250lbs per screw without having the find a stud!