GPW wrote:If it’s any consolation , think how long it would take to make one out of wood ,
how expensive it would be , and how much maintenance you Won’t have to do on your Foamie later on ...
No Rot is the Big Feature of a Foamie ... just use it ... Don’t worry, be Happy !!!!

Just for the sake of striking up an informative discussion, aren't both of these aspects greatly dependent upon how one builds it?
Not trying to be argumentative, here. Just trying to further understand the over-all benefits of one method vs. the other.
Cost:
It probably varies by location, but, around here, 4x8x2" foam panels go for well over $25 a sheet. You can't even get the 3" stuff without going to a specialty supplier. Cheapest I've found those is on craigslist.... nearly 2 hours away at over $30 a sheet.
And it still needs to be skinned on both sides.
In contrast, a 3/4" sheet of sanded ply can be had for about the same price and, depending upon the style you're building may or may not need skinned.
Not sure what I'm missing in the cost equation?
No-Rot:
It's certainly true that the foam, itself isn't going to rot. And, so long as it's skinned, there isn't much question of UV breakdown or the other types of breakdown that foam DOES suffer (even if it doesn't bio-degrade). Whether or not a foamie suffers ANY rot, though, depends greatly on the rest of the components. The skins (if they are wood or canvas). The floor. All are just as prone to rot on a foam build as they are on anything else, are they not?
The lack of rot is dependent upon how well your glue holds up. How well your paints and sealants hold up. How well your other seals and such hold up.
Aren't those also the fail points of any construction... foamie or otherwise?
Is a properly sealed piece of ply any more likely to rot than the frame or canvas on a properly sealed foamie?
Again, there's no debating that there's certainly one less component to rot on a foamie. Just not sure that, to keep the other components from rotting that there is any less long term maintenance involved.
Please elaborate.