Installing: This is a view from the inside of the coach. Place butyl tape, or closed cell foam around the flange of the window. Place window in hole. (Make sure weep holes are at bottom) Fit clamp ring against window from interior of coach. Holes in clamp ring should align with screw grove in window. Use #8 X 1/2" type "A" point screws to assemble clamp ring to window. Install starter screws at outer edges as shown. Do not "drive home" starter screws. Install remaining screws using pointed awl to align ring to screw grove if nessary. Tighten four starter screws, and remaining screws.