In Europe, you can buy 20mm cheapo XPS for 2 EUR per m2. If the production cost mainly is tooling etc, and not the polystyrene material, the higher density shouldn't be that more expensive.
In the post in your link there was no math proofs. And you said earlier that the core thickness doesn't matter, but that cannot be true, so don't think I can take your word for it.
Should be simple engineering, but no information I find explains it in a simple enough way for me to make an excel sheet for the calcs.
| How can the US XPS 700 be at almost 10x the price of the Finn?
I don't know. How can a ½" 4x8 sheet of 700 kpa XPS be 3$? Cheapest 15 psi xps is 3x that. And that's converting from thicker sheets and assuming cutting it down is free.
| Maybe you are looking at low volume pricing? The trinardo guy bought it in bulk.
That's 16+ sheets 2' x 8' at 1½” thick pricing. Or the equivalent in thicker sheets. Again assuming cutting down is free.
| Regarding Gropers message, I don't see any proof of his statements.
He shows how he got to the numbers he has and how you can do it too.
It's engineering. The only proof is in the bottles. You can check his math. That is all. That is enough.
What were you looking for?
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