Infection Control Risk Assessment (ICRA) is a federal and accreditation-driven requirement when building or renovating in or adjacent to an active healthcare facility. Most dental contractors skip it. Here's what it actually requires — and when it applies to your project.
ICRA requirements depend on facility type, proximity to patients, and applicable accreditation or regulatory standards. This post is general education — verify specific requirements with your contractor, infection control officer, and the applicable regulatory authority for your facility. [ASHE ICRA 2.0; Pereff healthcare vertical knowledge base, 2026]
ICRA stands for Infection Control Risk Assessment. It is a structured process — not a form, not a checkbox — that evaluates the risk of construction or renovation activities causing an infectious disease event in a healthcare facility, and prescribes the controls required to prevent it. Most dental contractors don't bring it up. That's not because it doesn't apply — it's because most dental contractors haven't built in healthcare environments where it's actively enforced, and they don't understand the requirements.
When ICRA applies to a dental project
The common misconception is that ICRA only applies to hospitals. The framework applies across a spectrum of healthcare settings, and dental offices fall within that spectrum — particularly in two scenarios:
- Renovation or construction in or immediately adjacent to an active dental or medical practice — meaning patients are still being seen in the building while construction is happening. Dust, airborne particles, and vibration from construction can compromise sterile or clean environments in adjacent spaces.
- New construction within a multi-tenant medical building where other healthcare tenants remain active. Even if your specific suite is vacant, you may share HVAC systems, corridors, and common areas with active practices.
- Practices with immunocompromised patient populations — pediatric oncology, dental care for medically complex patients — face a higher ICRA risk classification and more stringent controls even for routine renovation.
A standalone new dental practice build-out in a vanilla-shell retail or office building — no adjacent active healthcare tenants — faces a lower ICRA burden. But the moment construction is happening while patients are being seen within the same building, the rules change. [ASHE ICRA 2.0; Pereff healthcare vertical knowledge base, 2026]
What ICRA actually requires on a jobsite
ICRA 2.0 — the current standard from the American Society for Healthcare Engineering (ASHE) — classifies construction activity into four Construction Activity Types (A through D, increasing in invasiveness) and five Patient Risk Groups (1 through 5, increasing in vulnerability). The combination determines a Precaution Class (I through IV) that specifies required controls:
- Class I (lowest risk): inspect and dust surfaces, wet-mop the work area at the end of each shift. Applies to minor work — painting, replacing ceiling tiles — with no patient exposure.
- Class II: use dust-control methods including HEPA vacuuming. Seal unused doors with tape. Contain construction debris in covered containers.
- Class III: erect barriers (minimum 1/4-inch drywall or equivalent) that extend from the deck to deck — not just to a drop ceiling — to fully separate the construction zone. Maintain negative air pressure in the construction area. Workers pass through a sticky mat at the exit to prevent tracking dust. Daily cleanup before opening patient areas.
- Class IV (highest): full containment with a negative-pressure anteroom, HEPA filtration and continuous air monitoring, sealed penetrations, dedicated construction entry. All dust-generating work stops when the system is breached. Used for high-invasiveness work near high-vulnerability patient populations.
The most common contractor error: building only to the ceiling tile, not to the deck above. Ceiling tile is not a barrier — airborne particles travel through the plenum space above the tile and can re-enter adjacent occupied areas through HVAC returns. A proper ICRA Class III or IV barrier goes from concrete slab to concrete deck, with sealed penetrations at every mechanical and electrical penetration. [ASHE ICRA 2.0]
Medical gas and HVAC coordination during construction
Dental and medical offices have compressed air, vacuum, and in some facilities nitrous oxide and oxygen piped to each treatment position. During renovation or construction, these systems require careful coordination:
- Medical vacuum systems draw air from the treatment room — if the construction zone is adjacent, contaminated air can be drawn into the system if lines are open or improperly capped.
- HVAC zoning changes during construction may inadvertently pressurize or depressurize adjacent areas in ways not intended by the ICRA plan. The mechanical engineer and the contractor must coordinate the construction HVAC sequence.
- Any penetration through a rated wall for new MEP must be sealed before construction debris is present on the construction side. This is a sequencing issue, not just a materials issue.
Why most dental contractors miss this
The majority of dental construction contractors in DFW build new practices in vacant spaces — a cold shell in a suburban retail strip center or office building. In that environment, there are no adjacent active patients, no immunocompromised populations, and no active HVAC systems to coordinate. ICRA is rarely a concern. The problem surfaces when the same contractor takes on a renovation of an active practice — a 4-operatory expansion while the other 6 operatories stay open — and applies the same logic. They put up a sheet of plastic, call it a barrier, and carry on.
The result is construction dust migrating into active treatment areas, patient complaints, and in some cases infection-control findings from accreditation bodies or state inspectors. This is not a theoretical risk — it has created real problems for practices that didn't vet their contractor's ICRA knowledge before signing the contract.
Questions to ask your contractor before renovation starts
- Have you completed an ICRA matrix for this project? Can you walk me through the Construction Activity Type and Patient Risk Group classification?
- Does your barrier plan extend from slab to deck, or only to the ceiling tile?
- How will you maintain negative pressure in the construction zone, and how will you verify it's working?
- How are penetrations through rated walls for new MEP handled and sequenced?
- What is the daily cleanup protocol before patient areas open?
If a contractor answers any of these questions with confusion or a dismissive 'we always do it right,' that is your signal. ICRA is a documented process, not an intuition. A contractor who builds in active healthcare environments regularly will answer these questions specifically and confidently.
Pereff's healthcare construction practice builds in active and adjacent-to-active medical and dental environments. If your renovation requires keeping part of your practice open while we build, we'll walk you through the ICRA classification and controls required before a single wall is touched. Start a brief.
Want a project-specific take?
Every number in this post is directional and dated. A 30-minute preconstruction conversation with Pereff gives you a project-specific range you can actually use for budgeting, financing, and scheduling.