Joint cracking is one of the very few issues that can appear in EPS Cement Sandwich Wall Panel installations, and almost all these problems can be completely avoided with simple correct construction practices. The number one cause of joint cracking is rushing to apply joint filler before the EPS Cement Sandwich Wall Panel has fully adapted to the on site temperature and humidity conditions after delivery. You should always leave all delivered EPS Cement Sandwich Wall Panel standing upright in the construction site for at least 72 hours, to let the panel fully acclimatize before you start the joint treatment work. Never use ordinary gypsum joint filler to fill the gaps between EPS Cement Sandwich Wall Panel pieces, always use the special flexible anti crack cement based filler that is specifically formulated for this material. After filling the joint, press a full width alkali resistant fiberglass mesh tape firmly into the wet filler, to create a continuous flexible reinforcement layer across the joint between two panels. Projects that follow this joint treatment process report zero joint cracking issues even after more than 10 years of use.