When we produce project, we will debug and test them before leaving the factory, and then install all the frames, door panels and hardware. After the commissioning is completed and the test is passed, the door frame and door panel, or window frame are separated, and then packaged. Therefore, when you receive the product, the installation work is very simple, just fix the frame, connect the door hinge, install the hand, and sealant. But the door is too heavy and requires three people to complete it. Two people hold it and one person fixes it. For windows, you only need to install your hands and fix them. The glass and hardware have been installed at the factory, except for the large panels. Installation is not complicated, but it needs to be lifted and moved. In large projects, we also have professional installation technicians who can help you.