factory fit vs conversion windows

[Pascoe92]

just wondering what the difference is between the factory fitted windows and the conversion fitted windows?

[1664]

Factory are recessed. Some conversion companies didn't bother to rust/water proof the holes after they'd cut them so the obvious rust problems occurred years later. They all rust in the end mind, nothing lasts forever

[Pascoe92]

so there is no difference expect from the rubber sits recessed so are they interchangeable ?

and I have noticed stuff doesn't get sealed properly with my new van now

[1664]

The factory ones are press cut and painted in the factory. The others are retro cut using a saw and (depending on conversion) rust proofed to varying degrees; some good, some not so good, and some not..
I don't think they're interchangeable

[Plasticman]

is what interchangeable ?and show us a picky of what you have now,
mm

[AdrianC]

"Interchangeable" depends entirely on what size windows somebody cut a hole in a shiny new van to fit...

[CovKid]

Not so, the factory seals are made to take the shape of the recess too whereas retro-fit were designed for completely flat steel. They're quite different and no, not interchangeable although you might get retro-fit to go in a factory recess, depending on what seal is used.

[AdrianC]

Not so, the factory seals are made to take the shape of the recess too whereas retro-fit were designed for completely flat steel. They're quite different.

I was thinking more in terms of the glass.

[CovKid]

Aye to that. I've never forgotten when one certain member (who shall remain nameless), cut the window hole way too big for the window they wanted to fit. Got over-excited I expect.