Installing door and window openings on EPS Cement Sandwich Panel partition wall is a very common operation that can be completed easily with correct processing methods. Before cutting the opening position you need to mark the exact size outline of the door or window on the surface of the EPS Cement Sandwich Panel according to the design drawing. You should use a professional cutting tool to cut along the marked line and ensure the cutting edge is flat without obvious gaps or breakage. After finishing the opening cutting you need to install special reinforced frames around the opening to enhance the structural strength of the EPS Cement Sandwich Panel at the edge of the opening. Then you can fix the door frame or window frame firmly to the reserved reinforced frame part of the EPS Cement Sandwich Panel with expansion screws. Correct processing and reinforcement treatment can ensure that the door and window installed on the EPS Cement Sandwich Panel partition wall will not have the problem of loose frame or wall edge cracking after long term use.