COMMERCIAL BUILDING - SLABS

• Determine if the required base material is four inches thick and consists of clean, graded sand, gravel, crushed stone or crushed slag.
• Determine if a vapor retarder is provided and that it is a 6 mil visqueen vapor retarder with joints lapped not less than six inches and placed at the bottom of the slab.
• Determine if the slab thickness and reinforcement is in accordance with design criteria and compares favorably to approved plans.
• Verify that the concrete mix will result in a compressive strength equal to the design criteria. (Check Delivery Tickets)
• Verify that required and approved perimeter slab insulation is installed properly.
• Verify that all requirements to the approved plans have been met.

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