Insulating Concrete Form (ICF) blocks are forms and insulation all in one. Slightly more expensive than conventional foundations but time is saved by not needing to build and remove forms. Plus the added benefit of insulation.
Instead of burning wood for heat, some Europeans now build a compost pile over plastic water lines that extract heat from the decomposing plant material. Temperatures can get as high as 149 degrees. With a circulating pump as the only moving part, the com