Except for Happier Camper and Lil Snoozy
, which use a structural honeycomb floor, all the others use wood in some way to provide support. A few, like Scamp, use exposed plywood (or OSB on newer units), coated with fiberglass resin on the underside. Others, like Casita
, have a wood floor with a fiberglass underbelly. A third group, Trillium
and Escape, encapsulate the wood above and below in fiberglass.
Treated wood floors are the simplest and least expensive. I'm pretty sure the switch from plywood to OSB was cost-driven. Adding a fiberglass underbelly increases protection from road spray and makes a cleaner appearance, but adds weight
and cost, and can trap moisture that leaks
from above. Fully encapsulated floors are the least susceptible to rot from leaks
, but costlier to build and, once compromised, more difficult to repair.
All have stood the test of time. All can last decades with reasonable maintenance. Any can fail with neglect or abuse. Leaks from windows
, vents, and plumbing are the main cause of floor failure.