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  • Formworks Building
    Formworks Building
    (970) 247-2100
    PO Box 1509, 81302  Durango

    Outdated earth shelter systems utilizing spray on urethane foam on the exterior of the concrete lead to many other mistakes. Concrete should be waterproofed directly on the surface. The urethane foam is not closed cell material, not a waterproofing and therefore has to be protected by another cover…