Hi:Not sure if my first post worked so I’m trying again:I have an existing 2.5″ thick concrete floor on open web steel joists (approx. 3,000 sq.ft above a conditioned basement).… Hi:Not sure if my first post worked so I’m trying again:I have an existing 2.5″ thick concrete floor on open web steel joists (approx. 3,000 sq.ft above a conditioned basement).…Read MoreGreenBuildingAdvisor

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