Death, Taxes, and the bubble window leaking. Mama Aliner, why put a bubble window with high expansion on a low expansion roof panel? The bubble will eventual leak. How do you know the window is leaking? The plywood on the interior below the window starts to de laminate and wrinkles. How do you fix it? Most either ignore it. Some cut out the wrinkles and paint. My rear bubble started leaking. The "caulking" was removed and the bubble almost fell off. The "glue" holding the bubble on had popped loose. Only the "caulking" was holding ours on. Sikasil N Plus Clear from Amazon was used to glue the bubble back on and to caulk the bubble. Sikasil N Plus is highly recommended but difficult to work with. The black panel is covering and directs an A/C vent that comes from underneath the mattress and shoots air up along the rear roof panel. This is a full mattress layout. The damage was offset from the center. A piece of 1/4" Baltic Birch was cut so when centered it covered the damage. The Birch plywood was edge banded with Cherry. Screwed on with stainless steel screw because they look like brushed nickel.