We have the frameless windows on our Palamino Solaire and unfortunately we have had problems. Our trailer is back at the factory for repairs now. Our dealer told us the window has an internal seal. Our rear window and a side window were not installed correctly. We apparently must have had slow unnoticeable leaks which led to wall and floor damage. We had owned the trailer about 10 months when we noticed bubbling on the interior wall covering and exterior fiberglass. Luckily the repairs are being done under warranty.