Covid-19 Cleaning and Disinfection for Commercial Premises

Understanding Covid-19 Cleaning Requirements for Commercial Spaces

The SARS-CoV-2 virus transformed commercial cleaning from a routine maintenance activity into a critical public health measure. While the acute pandemic phase has passed, Covid-19 continues to circulate in the community, and the cleaning protocols developed during the pandemic have established new baseline standards for commercial hygiene. Businesses across Australia now recognise that enhanced cleaning and disinfection practices are essential for protecting staff health, maintaining operational continuity, and demonstrating duty of care under Work Health and Safety legislation.

Professional Covid-19 cleaning encompasses both routine enhanced cleaning to prevent transmission and reactive deep cleaning following a confirmed case in the workplace. Both approaches require TGA-approved disinfectants, trained personnel with appropriate personal protective equipment, and systematic processes that align with Safe Work Australia and state health authority guidelines.

How SARS-CoV-2 Spreads in Commercial Environments

Understanding the transmission pathways of SARS-CoV-2 is fundamental to designing effective cleaning protocols. The virus spreads primarily through respiratory droplets and aerosols generated when an infected person breathes, talks, coughs, or sneezes. While airborne transmission is the dominant pathway, surface (fomite) transmission remains a relevant concern in commercial settings where multiple people share equipment, workstations, and common areas throughout the day.

Research published by CSIRO found that SARS-CoV-2 can survive on common surfaces including stainless steel, glass, vinyl, paper banknotes, and plastic for periods ranging from several hours to several days depending on temperature, humidity, and surface porosity. High-touch surfaces in commercial environments — door handles, lift buttons, shared keyboards, meeting room tables, kitchen benchtops, bathroom taps, and handrails — represent the highest risk points for fomite transmission and require the most frequent cleaning attention.

TGA-Approved Disinfectants for SARS-CoV-2

The Therapeutic Goods Administration (TGA) regulates disinfectants in Australia under the Australian Register of Therapeutic Goods (ARTG). For Covid-19 cleaning, only disinfectants that have been specifically tested and approved for efficacy against SARS-CoV-2 should be used. The TGA maintains a register of disinfectants with approved claims against SARS-CoV-2, categorised as hospital-grade, commercial-grade, or household-grade based on their intended application and level of performance testing.

The most effective active ingredients for SARS-CoV-2 surface disinfection include quaternary ammonium compounds such as benzalkonium chloride, alcohol-based formulations containing a minimum of 70 percent ethanol or isopropanol, sodium hypochlorite (bleach) at concentrations of 1000 parts per million for general surfaces or 5000 parts per million for bodily fluid spills, and accelerated hydrogen peroxide formulations. Hospital-grade disinfectants provide the highest level of efficacy and are recommended for healthcare settings, aged care facilities, and post-case deep cleaning in commercial premises.

Routine Enhanced Cleaning Protocols

Routine enhanced cleaning represents the ongoing preventive approach that commercial premises should maintain. This involves increased frequency of cleaning for high-touch surfaces combined with the use of TGA-approved disinfectants rather than standard cleaning detergents alone.

High-Touch Surface Disinfection

High-touch surfaces require cleaning and disinfection at minimum twice daily, with additional cleaning during peak occupancy periods. These surfaces include door handles and push plates, lift buttons and handrails, reception counters and sign-in devices, shared office equipment including printers and photocopiers, kitchen and breakroom surfaces, bathroom fixtures including taps, toilet flush buttons, and hand dryer controls, light switches, and meeting room tables and chairs. The two-step process involves first cleaning the surface with detergent and water to remove organic matter, then applying TGA-approved disinfectant at the manufacturer-specified concentration and allowing adequate contact time — typically between one and ten minutes depending on the product — before wiping dry.

Common Area Deep Cleaning

Shared spaces including lobbies, corridors, meeting rooms, kitchens, and bathrooms receive enhanced daily deep cleaning using colour-coded microfibre systems to prevent cross-contamination between areas. Bathroom cleaning follows a specific protocol starting from the cleanest surfaces and working toward the most contaminated, with separate cloths for different fixture types. Kitchen and breakroom cleaning includes disinfection of all appliance handles, benchtops, sink areas, and communal food storage equipment.

Reactive Deep Cleaning After a Confirmed Case

When a confirmed Covid-19 case has been present in a commercial premises, reactive deep cleaning provides comprehensive decontamination of all areas the infected person accessed. This process follows stricter protocols than routine enhanced cleaning and is typically performed by specialist cleaning teams with biohazard training.

Assessment and Planning

The first step involves identifying all areas the confirmed case accessed during their infectious period, which extends from 48 hours before symptom onset. Building management records, access card data, and meeting room bookings help map the affected zones. A cleaning plan is developed specifying which areas require full decontamination, the chemicals and methods to be used, PPE requirements for cleaning staff, and waste disposal procedures.

Full Surface Decontamination

All surfaces within affected areas undergo thorough cleaning followed by disinfection using hospital-grade TGA-approved products. This includes not only high-touch surfaces but also floors, walls, furniture, fixtures, window sills, and any personal items left at the workstation. Soft furnishings including office chairs, carpeted areas, and curtains receive steam cleaning at temperatures exceeding 60 degrees Celsius or treatment with appropriate fabric-safe disinfectants.

Electrostatic Spraying and Fogging

Professional Covid-19 deep cleaning often employs electrostatic spraying technology, which applies an electrical charge to disinfectant droplets as they leave the sprayer nozzle. The charged droplets are attracted to surfaces with an opposite charge, providing uniform 360-degree coverage including the undersides and backs of objects that manual wiping misses. ULV (ultra-low volume) fogging disperses fine disinfectant mist throughout enclosed spaces, reaching air handling ducts, ceiling voids, and other areas inaccessible to manual cleaning. Both methods significantly reduce the time required for comprehensive decontamination while achieving superior surface coverage.

Personal Protective Equipment for Covid-19 Cleaning

Cleaning staff performing Covid-19 disinfection must wear appropriate PPE in compliance with Safe Work Australia guidelines and the hierarchy of controls established under Work Health and Safety Regulations. For routine enhanced cleaning, minimum PPE includes disposable nitrile gloves, eye protection (safety glasses or face shield), and a surgical mask. For reactive deep cleaning after a confirmed case, PPE requirements escalate to include P2/N95 respirator masks, disposable fluid-resistant gowns, disposable shoe covers, and double gloving.

All PPE must be donned and doffed following established protocols to prevent self-contamination. Used PPE is treated as clinical waste and disposed of in designated biohazard waste bags for collection by licensed clinical waste contractors. Staff must complete hand hygiene using alcohol-based hand sanitiser containing at least 60 percent alcohol immediately after removing gloves and before touching any clean surfaces.

Ventilation and Air Quality Considerations

Effective Covid-19 risk mitigation extends beyond surface cleaning to include indoor air quality management. The Australian Health Protection Principal Committee (AHPPC) recommends maximising fresh air ventilation in commercial buildings through HVAC system adjustments, increasing outdoor air intake ratios, and upgrading filtration to minimum MERV-13 rated filters. Portable HEPA air purifiers provide supplementary air cleaning in spaces with limited mechanical ventilation. CO2 monitoring equipment helps facility managers assess ventilation adequacy, with readings above 800 parts per million indicating insufficient fresh air exchange.

Australian Regulatory Framework for Covid-19 Workplace Cleaning

The Work Health and Safety Act 2011 establishes the overarching duty of care that persons conducting a business or undertaking (PCBUs) owe to workers and visitors. Under this legislation, employers must implement reasonably practicable measures to minimise the risk of Covid-19 transmission in the workplace. Safe Work Australia provides national guidance on workplace cleaning requirements, while state and territory health departments issue jurisdiction-specific public health orders and directions that may impose additional obligations.

Cleaning contractors providing Covid-19 disinfection services must hold appropriate licences, maintain current public liability insurance with pandemic-related coverage, and ensure all staff have completed infection prevention and control training accredited under the Australian Skills Quality Authority (ASQA) framework. Documentation of cleaning activities — including areas cleaned, chemicals used, contact times observed, and staff PPE compliance — forms part of the business’s WHS record-keeping obligations and may be requested during SafeWork inspections or WorkCover investigations.

Building a Long-Term Infection Prevention Strategy

Covid-19 has permanently shifted expectations around commercial hygiene standards. Forward-thinking businesses are integrating enhanced cleaning protocols into their ongoing facility management plans rather than treating them as temporary pandemic measures. This includes maintaining increased cleaning frequencies for high-touch surfaces, continuing to use TGA-approved disinfectants as standard practice, investing in touchless fixtures and fittings to reduce surface transmission risks, and establishing documented outbreak response procedures that can be activated rapidly when needed.

Professional commercial cleaning partners provide the expertise, equipment, and trained workforce necessary to maintain these elevated hygiene standards consistently. By engaging experienced Covid-19 cleaning specialists, businesses protect their staff, maintain operational continuity, and demonstrate the duty of care expected under Australian workplace health and safety legislation.