I’ve got flush-fit
@VGC Ltd windows that
@VanDocConversions fitted. The only time water has come in was when the van was parked up overnight on wheel ramps at the front - I was working on the underslung tank over the course of a few days -and we had rain, which meant that the rain ran the wrong way along the inbuilt drainage channel, leaving a small (fist sized) puddle inside. Otherwise they’ve been fine, look the part, and don’t leak like the OEM windows do. They’re expensive, and the inner aperture is narrower than OEM, but I can live with that.