We decided that the best way to insulate the tank base, with all its nooks and crannies, was to spray it on. Isothane's Duratherm was what we have used, supplied by Sprayseal. Here is one of four giant barrels of the foam - weighing in at 3/4 of a tonne of ingredients. The heated ingredients are delivered at high pressure.
Gary McKee in full swing with the insulation spray. We are using 170mm thickness of foam. The roof will be laid on top of it within 24 hours. It is amazing to watch Gary applying this stuff. He has been doing it for 28 years and thinks he will get to enjoy it eventually.
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