Abstract: A construction material light weight as compared to standard concrete yet having excellent thermal insulation qualities. The material when processed uses cement, pumice in small size particularized form and/or volcanic ash, scoria in particularized form, vermiculite in flaked particle form and water for the cement. While excellent product may be formed with these ingredients alone a more uniformly predicable product may be produced if, prior to mixing of all the ingredients, the vermiculite is mixed with kerosene on the ratio of approximately one cubic foot to one fourth cubic foot. The vermiculite is then mixed with the pumice to kerosene coat the pumice to block absorbtion of water from the water cement mixture by the pumice to thereby insure proper curing of the cement binder in the overall material mix.