Just to be boringly geeky. Java has been taken apart, and the indsutry has not collapsed. There are free, open source versions available for many platforms.

The issues with RoofKrete seem to be that the claims of it's unique qualities appear to be largely anecdotal, rather than backed by tests that are regarded as standard in the industry. You do need a piece of paper, or some well accepted proof before anyone is going to risk the complications and expenses of attempting to build a home that would be required to last decades and provide a good quality living environment out of a material that has never been used for that application. A flat roof is not the same as an entire building.

Personally, it seems to me that this is a clever solution to a particular type of problem. That problem isn't 'how to build an entire house', or 'how to build an eco-structure'. Trying to apply the solution to a different problem doesn't necessarily give you any benefits, and can involve a great deal of risk and expense.

Are they?

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Jon
My goal is to offer an energy saving cladding package which will be so sustainable, cost saving and healthy that it would not require any form of government subsidy or help. It would be purely a commercial proposition offered to people and they would want it because it would make economic sense.

Cheers

Steve