What inspections should a contractor prep for?

Key facts

Why inspection prep is schedule work

Corporeal Visions describes the chain: a two-week equipment slip pushes rough-in, which pushes inspections, which pushes the certificate of occupancy (Corporeal Visions). In NYC, GCMM says scheduling a DOB inspection can take several days to a week, depending on inspector availability (GCMM). A failed inspection costs the re-inspection wait plus every trade stacked behind it.

Checklist 1: Before you call for rough-in

GCMM lists the rough inspections that happen before walls close: plumbing, electrical, HVAC and fire protection (GCMM).

• Slab and under-floor plumbing matches the equipment layout before concrete is poured, on slab projects (Corporeal Visions). Confirm against dental chair rough-in specs.
• Plumbing venting walked by your plumber against the drawings. It's one of GCMM's top failure items (GCMM). See dental office plumbing requirements.
• Firestopping at every penetration through rated walls, including low-voltage. GCMM flags firestopping as a top failure (GCMM) and says firestop work is far more disruptive after construction (GCMM cabling guide).
• Patient care space wiring: branch circuits in qualifying metal raceway or cable with an insulated copper ground, and no isolated-ground receptacles within the patient care vicinity (Mike Holt (NEC 517)).
• Panel labeling complete and legible. It's another of GCMM's top failure items (GCMM).
• Low-voltage roughed in before close-up, per the drop schedule.
• Vacuum and air piping installed and pressure-ready.

Checklist 2: Medical gas and vacuum

Where the office has piped nitrous, oxygen or medical-gas-classified systems, the local AHJ's checklist governs. The City of Las Vegas checklist, based on NFPA 99, is one published example (Las Vegas Fire):

• Testing by a person other than the installing contractor, certified by an independent medical gas testing agency, before the system is used
• Initial pressure test at 1.5 times operating pressure, not less than 150 psig, using oil-free dry nitrogen NF
• Initial cross-connection test, and repeated for each installed system
• Initial piping purge, outlet by outlet
• 24-hour standing pressure test at 20% above normal operating pressure, with a change no greater than 0.5%
• Standing vacuum test

Las Vegas presents this as basic information and points to the adopted codes (Las Vegas Fire). Confirm your jurisdiction's version. See the NFPA 99 medical gas contractor checklist.

Checklist 3: X-ray rooms

• Shielding plan approved where your state requires it, before installation. NC and SC both require review before install in the cases they cover (NC DHHS, SC DES).
• Barriers built to the approved plan, with photos before drywall. See x-ray shielding plans.
• FDA 2579 assembly report filed by the assembler within 15 days (FDA).
• Post-installation survey scheduled: NC requires one within 30 days of initial operation for installations it exempts from plan review (NC DHHS); SC within 30 calendar days of installation (SC DES).

Checklist 4: Before the final and the CO

• Finishes complete before equipment install. A-dec calls for finished floors, ceiling, plumbing, lighting and paint first (A-dec).
• Air and water lines flushed before final connection (A-dec).
• Mechanical test-and-balance report in hand. See dental office HVAC.
• Accessibility items walked. See ADA requirements for dental offices.
• Final building inspection, the CO or certificate of completion, and the punch list. These make up GCMM's last phase, along with NYS radiation registration verification in its market (GCMM).

The inspection-day kit

Have these on site for every inspection:

• The approved, stamped permit set and any revisions, plus the inspection card
• Equipment rough-in templates and manufacturer installation guides for anything the inspector may ask about
• Med gas certifications and test reports, where applicable
• Shielding approval letters for the x-ray rooms
• A named person who can answer for each trade, with phone numbers
• Clear access to above-ceiling areas, panels and mechanical rooms
• A ladder and work lights, so above-ceiling work can be checked without a wait

Track it so nothing waits on you

The permit & inspection tracker (free tool, coming soon) will list each inspection with its prerequisite items and the trades waiting on it, and share status with the dentist. A Studio plan gives your low-voltage crew a fixed drop schedule, so cabling and firestopping get done before you call for close-up.

How FloorStack helps

FloorStack is a dental build-out platform that helps contractors and owners see the same schedule. The permit & inspection tracker (free tool, coming soon) will sequence inspections, and Studio sets the technology scope that has to be in the walls before close-up. See the Dental Office Construction hub, the owner-facing dental office inspection checklist, dental office permits and NFPA 99 for dental offices.

Free tools for this step

• Permit & inspection tracker (free tool, coming soon): sequence and share inspection status.
• Studio (live, free plan): lock low-voltage scope before close-up.