I'm sure Beynac will forgive me for butting in here. I've moved this thread into Baseboard design and construction as the link three posts back shows an important alternative method of light baseboard construction. It calls for a different approach to the design of the scenery, some extra care in how it is supported and transported and the application of a thorough layer of moisture proof varnish.
Why bother then? It's very light weight yet strong. The major material can be found cost free and it requires less carpentry skills and tools. All things which may persuade more beginners into the hobby and I think we all agree that is a very worth while thing. Don't be put off by the fact that the commentary is in French, just turn it off, as a how-to the video works perfectly in silence.
As it's the whole point of my interruption I'll repeat the link here
https://www.youtube.com/watch?v=40Hs8GfnfZ4