Originally Posted by Fishbone
What size are the roof vents on trailers from the 60's? Are they all the same?
There are only 2 sizes.
The square vent covers are called "solardomes" and are 14" X 14" nominal.
The rectangular vent covers are called "astrodomes" and are 14" X 26" nominal.
The originals back then were metal or fiberglass. Neither one let any day light into the trailer.
Today, they are available in plastics that let sunlight into the trailer.