nmhuntr wrote:
...what you see as the pros and cons of either aluminum sideline or fiberglass.
Aluminum siding is less expensive and tends to use wood for most of the structural parts (studs) of the walls. The aluminum siding is attached directly to the studs. Water damage (from a leaking roof or windows) typically only show up on the inside. Rotten structural wood can be fairly easily repair, except for heavily rotted plywood floors. RVs made this way tend to be less expensive.
Most people believe that the smooth fiberglass siding "looks nicer". It is heavier than aluminum siding, but they make up for it by using aluminum for the studs. Frequently
(but not 100% of the time) they uses a lightweight non-organic
(no wood fiber) sheathing between the aluminum studs and the outer fiberglass skin for rigidity and to provide a perfectly smooth surface for the fiberglass to adhere too. When there is "delamination"
(the glue between the sheathing and the fiberglass skin has failed) it can be difficult to repair. The floors are still plywood so if they rot, it is they same difficulty to repair. RVs made this way tend to be more expensive.
In both cases, the roof is the critical item in the design. You want an RV that does NOT have a perfectly FLAT roof. It need some pitch to help water drain. Typical "rubber"
(EPDM) require some care when installing. There are many small things that can go wrong than can cause a leak. Proper maintenance for maximum durability includes wash twice a year and applying a UV protectant.
(Of course storing out of the sun and rain is the best.)
