Slab on Grade Pre-Pour Inspection

Pre-pour inspection for slab-on-grade work covering subbase preparation, vapor barrier installation, reinforcement mesh, and dowels before concrete placement.

General Site Readiness

• Pour area matches approved plans and limits
  Verify the slab area, dimensions, and pour boundaries match the latest approved drawings or field layout.
• Access to pour area is clear for crew and equipment
  Confirm there are no obstructions that would prevent concrete trucks, pumps, screeds, or finishing equipment from reaching the work area.
• Subgrade and surrounding area are free of standing water, mud, and debris
  Check the slab area and adjacent work zone for water, loose debris, or contamination that could affect the pour or slab performance.
• Required embeds, sleeves, and penetrations are installed and secured
  Verify all planned penetrations, sleeves, blockouts, and embeds are in place, correctly located, and protected from movement during placement.
• Weather and site conditions are suitable for placement
  Confirm conditions are acceptable for the planned pour, including no active rain, excessive wind, or other conditions that would compromise placement or finishing.

Subbase Preparation

• Subbase is compacted to specified requirement
  Confirm the subbase has been compacted per project specification and is firm, uniform, and free of soft spots.
• Subbase elevation is within tolerance
  Measure the prepared subbase elevation against the required grade and confirm it is within project tolerance.
• Subbase surface is level, uniform, and free of sharp protrusions
  Inspect the prepared surface for ruts, ridges, rocks, or other conditions that could damage the vapor barrier or affect slab support.
• Required base material type and thickness are installed
  Verify the base course material matches the project specification and has been placed to the required thickness.
• Compaction test or field verification is available
  Confirm compaction verification, test results, or field approval is available for review when required by the project.

Vapor Barrier Installation

• Vapor barrier material matches project specification
  Verify the installed membrane type, thickness, and product match the approved specification or submittal.
• Vapor barrier is continuous with sealed seams
  Inspect seams, overlaps, and transitions to confirm the barrier is continuous and properly taped or sealed.
• Vapor barrier is free of punctures, tears, and unsealed openings
  Check the membrane for damage, holes, or gaps that would compromise moisture protection.
• Vapor barrier is turned up at edges and penetrations as required
  Verify the membrane is properly lapped, turned up, and detailed around edges, penetrations, and blockouts per project requirements.
• Vapor barrier is protected from damage before pour
  Confirm the membrane has not been displaced by traffic, reinforcement placement, or other site activity.

Reinforcement Mesh

• Reinforcement mesh matches specified size and grade
  Confirm the installed mesh type, wire size, and spacing match the approved drawings or specification.
• Mesh laps meet project requirement
  Verify mesh overlaps are installed to the required lap length and tied or secured where specified.
• Mesh is elevated on chairs or supports to maintain cover
  Check that reinforcement is supported so it will remain at the specified height during the pour and not rest on the vapor barrier or subbase.
• Mesh is free of excessive rust, oil, mud, or contamination
  Inspect reinforcement for contamination that could impair bond or indicate improper storage/handling.
• Required concrete cover is achievable with current placement setup
  Confirm the reinforcement position and support arrangement will allow the specified concrete cover at edges and top surfaces.

Dowels and Edge Conditions

• Dowels are installed at required locations and spacing
  Confirm dowels are present where required and match the spacing shown on the drawings.
• Dowels are aligned and secured against movement
  Check that dowels are straight, properly oriented, and fixed so they will not shift during concrete placement.
• Edge forms are straight, braced, and at correct elevation
  Inspect perimeter forms for line, grade, and stability before the pour begins.
• Isolation joints and expansion materials are installed where required
  Verify joint materials are in place at walls, columns, or other locations specified by the plans.
• Slab openings, blockouts, and edge details are protected
  Confirm openings and edge conditions are marked, secured, and ready to remain clear during placement.