I thought professionally made window covers were over priced. My initial attempt was DIY, I traced the patterns and cut Reflectix. In my second attempt I bought the WeatherTech kit. On the third try, the Heat Shield kit. None of these products worked satisfactorily. The covers were flimsy, delicate, didn’t stay put in the window very well, setup and take down were a hassle, and they required storage when not in use. I finally bit the bullet and bought VanEssential and VanMade Gear covers. They are available for the Promaster, Sprinter, and Transit. At the time of purchase, it was the single most expensive element in my build, even exceeding my EcoFlow Delta power station. The covers attach magnetically to the metal around cargo van windows. For passenger vans with plastic clad windows, small magnets are glued in place as attachment points for the covers. The covers are well made and durable. They are thermally effective. They prevent (or dramatically reduce) condensation on the windows. They are easy to use- taking only a few seconds to deploy up or down. They stay in place, there's nothing to store away. They prevent interior light from leaking out at night or daylight from entering in the morning. With Sprinter’s OEM window tint, the covers are invisible- it just looks black (except for the front windows and windshield).
Whether I’m driving or parked, I like being able to see outside. I wanted windows all around and keep most of the covers folded up in place, deploying them down only when I want privacy. I don’t use window covers in the front for several reasons. First, they would be of limited use since I don’t have swivel seats. Second, they need to be stored when not in use, which is most of the time. Third, I prefer a blackout curtain, which makes the van look unoccupied when parked.
Professionally made Insulated window covers are expensive but DIYers are not likely to create a better solution without seamster skills and equipment. In my opinion, it is money well spent.
