Can you be more specific about where the water is coming in? We pulled and re-installed the rear window on our Trillium
4500. Here's what we did:
- Replaced the Hehr top seal which required disassembling the window frame.
- Replaced the Hehr y seals.
- Used double layer of butyl tape and made sure butyl was oozing out all the way around after tightening the screws.
- Checked for leaks in factory applied sealant in the aluminum window frame joints and applied new sealant as needed.
Because the window "sill" is slanted down toward the exterior, any water that gets in around the jalousie panes generally drains back out.