Quote:
Originally Posted by Mikesolar
The collector is nice. I really like the insulation blocks going on the house. I saw them in Germany as well. They are polyurethane?
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Insulation blocks are very popular in Ukraine. Almost everyone use them for building of new house. It is aerated concrete or foam concrete. Concrete with air bubbles! Try google images by phrase "aerated concrete" and you will see lot of pictures.