Shawn Viggiano said: Oh and watch the wind, maybe you can put a spike through the bottom …
In an outhouse all this is highly suggestive… Ouch! 
Nice work, Tom … I haven’t seen those figures before, I like 'em! Personally I’m skeptical about any glue /wood bond outdoors, even if the wood is sealed. It’s my belief that water/vapour/humidity will get into any organic/fibrous stuff and weaken any glue bond eventually. We’ll be watching…
Your foam components will last forever. I’ve seen summer cottages up here that had foam on the exterior, painted with latex, which was probably unnecessary, all still good after 30 years of lake-effect Canadian winters and brutal Mid-continent summers…
Nice scene, Ken. I think your comments and methods are valid, and we’ll see how the Doc’s outhouse fares. The only way I’ll use wood outdoors is with mechanical connections, and I do a lot of that. On Dave’s Taylor’s advice I just acquired a pin nailer for these projects, BTW. I’d never heard of such a tool before.
I guess you’re never too old to learn something new!
I have little experience with plastics, Ken. Being a throwback to earlier days and ways, I generally work with metal and wood, and these are always the first materials I think of.
Do you find that plastics stand up to UV? That’s probably my greatest reservation about this material, aside from trying to figure out how to mak it stick. Your results are admirable.