Teardrops n Tiny Travel Trailers

Trying to figure out what I am going to use to build my floors and water proof them. Was wondering why people do not use a sheet of aluminum (0.03 or similar) to the under side of their floor instead of using roofing tar and other sealing methods? Or have people done this and I am just not looking hard enough?

Im using aluminum for the sub floor of my build.
1.6mm sheet for tbe rear under the draws and 2.5mm tread plate for tbe front section.
Light,dosnt rust and waterproof

Cost & availability are most likely the two main factors. Most people don't have a sheet laying around to use for a bottom skin. Cost is another factor.

Asphalt is cheap, foolproof & available everywhere. Once it's in place & dry, the asphalt will outlast the build. Since it's not subject to any UV degradation, it just lasts a long time. All it needs to do is provide a moisture barrier & the occasional shed mud, snow & slush from travel in sloppy conditions.

I also looked at HDPE sheets (white milk jug plastic sheet material, .063" X 60" X 120") which was cheap & also completely bulletproof for a trailer floor, but didn't have a local distributor to buy from. I went with 2 coats of polyurethane & some white roof coat.

Why throw money away if you don't need to?

vegask wrote:Trying to figure out what I am going to use to build my floors and water proof them. Was wondering why people do not use a sheet of aluminum (0.03 or similar) to the under side of their floor instead of using roofing tar and other sealing methods? Or have people done this and I am just not looking hard enough?

I use aluminum attached to the steel frame (.050" minimum) overlaid with extruded polystyrene & a thin flooring. No wood flooring structure or tar. Some pictures & more information here: viewtopic.php?f=27&t=51991