To install impact windows, there is no special installation needed for typical window locations. For tougher, hard to reach places an experts help should be considered. To install the window you first dry fit the impact window into the opening to see the actual size before applying any sealer. You then remove the window and apply an approved sealant to the outside area of the opening. Then place the window into the opening and nail the window into the frame. There are extra steps that can be taken to ensure it holds. Applying a silicone caulking onto the edges will put an extra hold on the window. As it may sound simple, impact windows are very heavy, and a simple mistake can lead to damages to your home and or window. With a professional, the window can be installed with ease.