Keep a health centre operating by treating construction as a sequence of risk-assessed stages rather than one continuous work zone. For each stage, define the clinical services and patient groups affected, isolate the work, preserve safe routes and essential utilities, communicate changes, monitor controls every day, and commission the area before it returns to use. Infection prevention and control (IPC) must remain involved from planning through handover; the exact sequence and approvals depend on the building, scope and jurisdiction.
Why phasing is a clinical-safety decision
Renovation in an occupied health centre can expose patients and staff to dust, moisture, noise, vibration, altered air pressure, utility failures and confusing circulation. Those hazards are not merely inconveniences. A failed barrier can let contaminated air or debris reach a treatment room; a poorly timed water or electrical interruption can stop a service; and an unplanned detour can separate a patient from a clinical team or emergency exit.
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The Centers for Disease Control and Prevention (CDC) describes a construction-associated aspergillosis outbreak among oncology patients linked to depressurisation and unfiltered outdoor air. That incident is not a population-wide risk estimate, but it demonstrates why ventilation, pressure relationships and vulnerable patients must be considered before work starts.
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Start with an infection-control risk assessment and a multidisciplinary team
Complete the ICRA before setting dates
CDC guidance recommends an infection-control risk assessment (ICRA) before construction, renovation, repair or demolition. Its purpose is to define the scope of the activity and the barrier measures required. The assessment should cover the proposed work area and any patient-care areas, supply rooms, circulation routes or clinical support spaces that could be affected. Include spaces directly above and below the work where dust, water, vibration or service risers can transmit risk.
Do not select stage boundaries first and ask IPC to approve them later. Use the ICRA findings to decide whether a stage can be isolated by room, zone, floor or service area, what pressure and filtration controls are needed, and whether a patient group or service must move temporarily.
Give the right people authority
Form the project team at the concept stage. At minimum, include:
- IPC or infection-prevention professionals, who set risk controls and escalation thresholds;
- Facilities or engineering staff, responsible for HVAC, electrical, water, medical gases, fire systems and building controls;
- Leaders of every affected clinical service;
- Operations, scheduling and patient-flow representatives;
- The construction manager, designers and trade supervisors; and
- Safety, accessibility, emergency-planning and regulatory representatives required by the jurisdiction.
Queensland Health advises involving infection-prevention professionals throughout the infrastructure life cycle and for maintenance that disturbs walls, ceilings or duct spaces or creates dust. Name one person with authority to stop work when a control fails and one person authorised to approve a restart after correction. Record deputies for nights and weekends.
Inventory services, dependencies and vulnerable patients
Map what must remain available
List every service that must stay open, its operating hours, minimum space, staffing needs and dependencies. A clinic room may rely on a nearby clean supply store, a shared hand-washing point, a particular electrical circuit, a data connection, medical gases or a specific ventilation mode. Mark those dependencies on the construction drawings and the daily operational plan.
Map public, staff, patient-transfer, service and waste routes separately. Note lifts, stairs, fire exits, toilets, waiting areas, reception points and ambulance approaches. A route that is physically open may still be unsuitable if it passes through a dusty zone, lacks accessible clearance or conflicts with construction deliveries.
Identify patients who need additional protection
Use the ICRA to identify target populations whose care makes them more susceptible to airborne particles, moisture, noise or loss of environmental control. Depending on the centre, this may include immunocompromised patients, oncology patients, people receiving complex infusions, premature infants or patients with respiratory vulnerability. Ask each clinical lead whether a temporary move, appointment-time change or additional separation is needed.
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When relocation is indicated, arrange it in advance. Confirm the receiving room, equipment, staff, records, transport route, cleaning status and emergency response before the first affected appointment. Do not rely on a same-day decision for a high-risk patient.
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Choose stage boundaries that preserve care
There is no universally superior phasing model. Compare alternatives against continuity of clinical services, patient and staff exposure, vulnerability of affected groups, ability to isolate and control airflow, HVAC and utility resilience, circulation safety, noise and vibration, temporary-space requirements, total duration, stage complexity and commissioning effort.
| Phasing model | Advantages | Typical constraints to test | Best fit when |
|---|---|---|---|
| Room-by-room | Small work fronts and short local closures can keep neighbouring rooms operating. | Repeated moves, more temporary barriers and frequent utility tie-ins. | Rooms have independent services and nearby swing space is available. |
| Zone or departmental | Efficient trade work and clearer separation between construction and care. | Larger temporary detours and a greater chance that shared HVAC or supplies are affected. | A department can operate from a defined alternative area. |
| Floor-by-floor | Strong physical separation and simpler worker logistics. | Longer closure of each floor, major vertical-route planning and possible lift impacts. | Floors have independent access, services and fire-compartment arrangements. |
| Service-line decant | Protects a complete clinical service by moving it temporarily, allowing faster construction. | Requires suitable capacity, equipment moves, staff orientation and validated receiving space. | The service has a safe, approved temporary location and the move can be scheduled. |
The 2010 Facility Guidelines Institute (FGI) text states that renovation projects should include phasing “to minimize disruption of existing patient services” and that renovation areas should be isolated from occupied areas based on the ICRA. That document is a 2010 edition, not a statement of current local code. Check the currently adopted FGI edition, building and fire codes, accessibility rules, health-facility requirements and authority approvals for the project location.
Write a stage plan before mobilising
Give every stage its own one-page control plan, drawing and sign-off record. Include:
- Exact work limits, rooms, ceiling voids and areas above or below;
- Barrier type, height, joints, doors, seals and inspection points;
- Dust, moisture, debris, noise and vibration controls;
- Worker entry, material delivery, waste removal and staff routes;
- Patient, visitor and accessible detours, with signs and escorts where needed;
- Impacted supplies, equipment and clean-storage locations;
- HVAC zones, pressure relationships, filtration and monitoring points;
- Planned utility interruptions, notification times and contingency actions;
- Services or patient groups requiring temporary relocation;
- Daily inspection responsibilities and stop-work criteria; and
- Commissioning checks and the person authorised to return the area to use.
CDC recommends signs that identify construction areas and potential hazards, together with marked pedestrian detours. Post signs before the change, not when the first patient encounters a closed corridor. Use consistent colours or symbols for public, staff and construction routes, and verify that signs remain visible after furniture, hoarding or temporary equipment is installed.
Contain dust, moisture and contaminated air
Design the isolation, do not improvise it
Indoor healthcare construction requires a physical barrier and engineering controls suited to the risk. The ICRA should specify the barrier arrangement, access door, pressure relationship, filtration or exhaust method, cleaning method and inspection frequency. A temporary construction dust barrier zipper door kit can be one supply category, but a consumer kit by itself does not demonstrate clinical containment; IPC and facilities staff must set the specification and approve the installed assembly.
Seal penetrations, protect ceilings and floors, and keep construction materials out of occupied clean areas. Establish a controlled entry point with tack mats or equivalent cleaning measures where appropriate. Keep demolition debris covered during transport and schedule noisy or dusty tasks outside the most sensitive clinical periods when possible.
Protect against water and moisture
Plan roof, plumbing and wet-work stages with the same discipline as demolition. Protect occupied rooms below, isolate leaks promptly and define who can stop work if moisture enters a patient-care area. Store materials away from clean supplies and keep temporary coverings secured so they cannot shed fibres or obstruct fire or accessibility systems.
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Inspect barriers at the start of each shift and after deliveries, maintenance access or any incident. Record pressure, filtration, visible dust, moisture, door condition and housekeeping according to the stage plan. If dust escapes, a barrier is damaged or an unexpected odour appears, stop the activity that is causing the problem, protect patients, notify the designated authority and correct the condition before restarting.
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Keep patient and worker circulation separate and understandable
Draw the future route on a plan and walk it with a patient representative, an accessibility lead, a porter, a nurse and the construction supervisor. Check turning space, gradients, lift capacity, privacy, lighting, wayfinding, fire egress and the ability to move beds or emergency equipment. Keep construction deliveries away from waiting areas and appointment peaks whenever possible.
Provide a route for workers and another for patients and visitors. If they must cross, define a controlled crossing with a marshal, timing rule or physical separation. Protect reception and waiting areas from noise and dust, and tell appointment staff exactly where to direct people who arrive at the old entrance.
For every detour, publish the start date, affected entrances, accessible alternative, expected duration and contact point. Update web, telephone, text and on-site messages consistently. Staff should be able to explain the change in one sentence and know how to summon assistance for a person who cannot follow the route independently.
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Coordinate ventilation with IPC
Coordinate maintenance or alteration of patient-care HVAC systems with IPC. CDC advises avoiding a whole-system shutdown at one time whenever possible, relocating immunocompromised patients when necessary, and providing backup ventilation for specified critical spaces. Confirm the actual pressure relationships, air-change performance, filtration and temporary equipment with qualified facilities and infection-prevention personnel; do not infer performance from a fan’s nameplate rating.
List which rooms share an air-handling unit, return, exhaust, control sequence or pressure sensor. Define the permitted pressure direction during each stage, the alarm response and the reading or inspection that proves the condition is restored. If a critical area cannot maintain its required environment, stop admitting affected patients and activate the pre-approved relocation or service-continuity plan.
Build an interruption register
| System | Record before work | Contingency to define | Release check |
|---|---|---|---|
| Electrical power | Circuits, critical loads, isolation point and planned duration | Emergency power, battery support, cancellation or relocation trigger | Power quality, alarms, equipment restart and clinical sign-off |
| Water and drainage | Fixtures, valves, affected rooms and infection-control implications | Alternative hand hygiene, bottled or tanked supply where approved, service pause | Flush, temperature, leak inspection and cleaning confirmation |
| HVAC and pressure | Air-handling zone, pressure target, filtration and monitoring point | Backup unit, temporary relocation and stop-work threshold | Functional test, pressure verification and IPC acceptance |
| Data, nurse call and medical gases | Connections, isolation sequence and dependent equipment | Temporary devices, manual workflow or receiving location | End-to-end test with the affected clinical service |
The interruption register should name the decision-maker, notification method, start and finish window, affected services and escalation number. FGI’s 2010 phasing text identifies clean-to-dirty airflow, emergency procedures, criteria for interrupting protection, written interruption notifications and communication authority as provisions to address; use those concepts while checking current requirements in your jurisdiction.
Communicate, educate and monitor every day
Brief workers and staff before each stage
Before mobilisation, teach contractors and affected staff why the controls matter, where they may walk, how to enter and leave the work zone, how to protect clean supplies, and whom to call when conditions change. Repeat the briefing when the stage, crew, route or barrier changes. Keep a signed attendance record and a short stage-specific induction at the work entrance.
Use one reporting channel for problems
Create a rapid route for reporting dust escape, barrier damage, unusual noise or vibration, air-quality concerns, leaks, pressure alarms, utility failures and unsafe route conditions. The report should reach IPC, facilities and the construction supervisor without relying on an individual’s personal phone. Define who communicates with patients and who can pause work.
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Perform documented inspections
CDC recommends daily monitoring of contractor adherence to infection-control practices. A daily walk-through should check barriers and doors, pressure or filtration indicators, housekeeping, waste routes, signage, detours, worker PPE where required, material storage and any effect on occupied rooms. Log findings, corrective actions, owner and due time. Trend repeated failures; three minor barrier breaches may indicate that the stage boundary or access arrangement is wrong.
Public Health Ontario organises its construction resources into planning, work and commissioning phases. Use that lifecycle structure so monitoring does not stop when the trades finish.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Set stop-work and escalation rules
Write objective triggers into the stage plan. Examples include visible dust outside containment, loss of required pressure, water entering an occupied area, an unplanned utility outage, blocked egress, a damaged fire barrier, an inaccessible patient route, or noise and vibration that disrupt care. The trigger should specify immediate protection for patients, the person to notify, the area to isolate, the technical assessment required and the evidence needed before restart.
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Do not make the construction supervisor the sole judge of an infection-control event. IPC should determine whether the exposure risk is acceptable, facilities should verify environmental systems, and the clinical lead should decide whether appointments or procedures can continue.
Commission each area before returning it to service
Define acceptance criteria at the planning stage
Commissioning is a project phase, not an informal final clean. Before work starts, identify who verifies completion and what evidence is required. Depending on the work, this may include removal of barriers, cleaning and waste removal, inspection of ceilings and penetrations, HVAC and pressure tests, water-system checks, electrical and data tests, fire and accessibility inspections, equipment calibration and confirmation that supplies have been protected.
The reviewed guidance establishes commissioning as a distinct phase but does not prescribe one universal checklist or acceptance test for every health centre. Set criteria that match the ICRA, design, equipment and local approvals.
Use a controlled release
- Construction management reports the physical work complete and removes only materials authorised for removal.
- Facilities verifies building systems, alarms, pressure relationships, utilities and life-safety features.
- IPC verifies containment removal, cleaning, environmental conditions and any required monitoring.
- The clinical service checks room layout, equipment, stock, workflow, privacy and emergency access.
- Operations confirms staffing, scheduling, wayfinding and patient communications.
- The named authority signs the release-to-use record; unresolved defects are documented with an owner and restriction rather than silently accepted.
Keep the area closed if a critical acceptance item fails. A visually clean room is not ready if ventilation, water quality, electrical protection, fire separation or clinical equipment has not been verified.
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Compare plans with a decision scorecard
When two sequences appear feasible, score each against the same questions and involve the affected clinical leads:
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- How many appointments, procedures or beds remain available in each stage?
- Which vulnerable patients are closest to the work or affected by a service move?
- Can barriers and pressure relationships be maintained during deliveries and maintenance?
- What happens if HVAC, water, power, data or medical gases fail during the stage?
- Are accessible public, emergency, staff and construction routes clearly separated?
- What noise and vibration will patients experience, and when?
- Is temporary capacity genuinely available, equipped and approved?
- How many handovers, relocations and commissioning events are required?
- Can the team monitor controls at the required frequency, including nights and weekends?
Choose the plan that keeps risk controllable, not merely the one with the shortest construction duration. A shorter programme that requires repeated unplanned service interruptions can create more operational risk than a longer sequence with stable isolation.
Common failure modes and practical corrections
“We can keep the corridor open”
An open corridor is not automatically safe. If it shares air, passes patients beside demolition, blocks accessible clearance or conflicts with deliveries, redesign the route, strengthen separation or move the work window.
“The barrier is installed, so the risk is solved”
Barriers fail at doors, penetrations, ceiling interfaces and delivery times. Add inspection points, control access and monitor pressure or dust as specified by the ICRA.
“We will relocate patients if needed”
Unplanned relocation can fail because the receiving room lacks equipment, staff, records or environmental clearance. Validate the destination and rehearse the move before the stage begins.
“The whole HVAC system can be switched off overnight”
Overnight timing does not remove risk to stored supplies, adjacent rooms or early-morning patients. Segment the work, provide approved temporary ventilation or relocate affected care, and document restoration tests.
“The contractor will report problems”
Contractors may not recognise a clinical consequence. Give staff and workers the same reporting route, require daily monitoring and empower IPC, facilities or the clinical lead to stop work.
“Cleaning means commissioning is complete”
Cleaning cannot substitute for pressure, utility, fire, accessibility, equipment and clinical workflow checks. Use the release-to-use sequence and retain evidence for each acceptance item.
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Keep the ICRA, drawings, stage plans, interruption register, relocation plans, staff and worker briefings, daily inspection logs, incident reports, utility and HVAC test results, cleaning records, commissioning evidence, defect lists and release authorisations. Confirm which documents must be submitted to building control, fire authorities, health-facility regulators, landlords, insurers or accreditation bodies.
Because requirements vary by location and the cited FGI material is from 2010, have qualified local professionals confirm current building, fire, accessibility, infection-control, permitting and health-facility obligations. The final sequence should be approved for this building and this patient population, not copied from a generic healthcare project.
Quick Recap
A concise pre-start checklist
- ICRA completed and signed by the required disciplines.
- Services, dependencies, vulnerable patients and areas above and below mapped.
- Stage boundary, barriers, pressure strategy and worker routes approved.
- Patient, visitor and accessible detours installed, signed and tested.
- Relocations, appointment changes and temporary capacity confirmed.
- HVAC, power, water, data, medical-gas and fire-system interruptions planned.
- Emergency, stop-work and restart criteria written and understood.
- Staff and workers briefed, with a live reporting and escalation channel.
- Daily monitoring owner assigned for every shift.
- Commissioning tests, clinical checks and release authority agreed before work begins.
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