Travel Trailer Construction - Exterior Identification

[DallasSteve]

A recent thread addressed the construction of travel trailers and it identified 2 basic styles of construction:

Old - wood stud, fiberglass insulation, aluminum siding
New - aluminum tubing, solid foam insulation, fiberglass skin

When I am browsing travel trailers for sale I see basically two styles of appearance as represented in this photo. Is the bottom-left trailer appearance (with the ridges on the wall) always the Old construction and the top-right (with the flat walls) always the New construction?

[azdryheat]

I don't believe any builder is using wood any more. It's good that you're looking into how they're built. Many trailers are built so cheaply it's a wonder they hold together.

[rexlion]

"Always" is a strong word, so let's say almost always. I can think of one TT made in Canada that looks like your #2 example, but instead of a foam laminate sandwich with aluminum studs the Prolite has thicker molded-fiberglass panels that are bonded together at overlapping points with a sort of adhesive... no framing, As I understand it.

[azrving]

They still build new ones with aluminum like the lower pic.