Installation B & J ALUMINUM WINDOWSBuilders of Boat Windows for Marine IndustryContact Matthew @ 337-441-0646 sillycajun@aol.com How to Install Step One: Remove the clamp from the frame. Step Two: Try fitting the window in the opening. Trim if necessary. Step Three: Apply caulking to mounting flange. Step Four: While one person holds the window from the outside, reinstall clamp.