yes, backwards, the lip should go to the outside to seal the window [somewhat] against water entry into the door [make sure the drains are clear at the bottom of the door too] .... the rubber piece is called a lower sash seal

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics