Under-slab Insulation SIPs The seven-story brick building was originally constructed in 1913 for commercial use. In 2007 the building was rezoned from a commercial to residential building, resulting in upgrades to the building to meet residential zoning requirements. EPS15 Geofoam was installed as void fill beneath the concrete floor of the building to raise the elevation. One such upgrade required raising the floor by 24 inches to mee

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