Schools and universities must keep corridors clean without disrupting classes. Students move between classrooms throughout the day, leaving dust, dirt, and spills behind. Cleaning during class can create noise, wet floors, and obstacles for students and staff. Cleaning only after hours may leave daytime messes unattended. Facility teams need a schedule that balances cleanliness with classroom activities. Autonomous cleaning robots can help manage this challenge. Epic Robotics, partnered with Pudu Robotics, offers cleaning robots for schools and universities across Canada. The PUDU CC1 is one option for automating routine corridor floor cleaning.
What Should Facility Leads Know About Cleaning Corridors During Class?
Four things interrupt class: sound through the door, wet floors, people in the path, and staffing gaps during the day.
Dry passes suit occupied windows. Scrub passes suit the time before the first bell and after dismissal.
The Acoustical Society of America’s classroom standard limits an empty classroom to 35 dBA. Measure at the classroom door, because a spec sheet only gives the noise at the machine.
A robot like the PUDU CC1 runs below 70 dB, fits through 70 cm gaps, and covers 700 to 1,000 m² per hour.
IEC 63327 is the safety standard for robotic floor machines used indoors, and its scope names schools. Ask any supplier for proof of compliance.
Corridors beside music rooms, early-years classrooms and libraries need a site assessment first.
What Interrupts a Class When Corridors are Cleaned?
Four things interrupt a class when corridors are cleaned. They are sound through the door, wet floors, people sharing the corridor, and a staffing gap during the day.
Most advice fixes only the first one. Buy a quieter machine, or clean at night. Both skip the staffing gap. In May 2026, the Lambton Kent District School Board in Ontario confirmed it would reduce 10 custodial positions across its 64 sites, and local unions said 22 jobs were at risk. The board said it would manage as much of the change as possible through attrition. Fewer positions leave fewer people to cover corridors during the day.
Four Interruptions and the Fix for Each
Sound through the door. Measure at the classroom door and keep scrub passes away from sensitive rooms.
Wet floors. Run dry passes while students are in the hall.
People in the path. Use sensors, a 70 cm passing width, and routes that finish before each bell.
Daytime staffing gap. Schedule robot routes that run without a custodian beside them.
When Can Schools Clean Corridors Without Disturbing Classes?
Schools can clean corridors in five windows. Those are before the first bell, during class blocks when halls are empty, passing periods, after lunch in commons, and after dismissal. Passing periods are the window to protect.
The School-Day Cleaning Windows
Before the first bell. Full scrub and sweep, because halls and classrooms are empty.
Class blocks. Dry sweep, vacuum, or dust mop, because halls are quiet and floors stay dry.
Passing periods. Keep the robot docked or parked clear of traffic while crowds fill the halls.
After lunch. Spot and sweep passes in commons, because spills and debris peak.
After dismissal. Full scrub, then charge, because rooms are empty.
Spokane Public Schools in Washington State follow the same logic. Its robots run mostly at night and also clean common spaces after lunch during the school day.
Example. A secondary school’s main corridor is empty at 10:40. A cleaning robot runs a dry pass along it and returns to its dock before the 10:48 bell. If a student steps into the path mid-route, the LiDAR, ultrasonic sensors, RGBD depth cameras, and bumper sensor detect the person, and the robot stops safely. When the bell rings, the robot is docked, and the corridor belongs to the students.
Quick tip. Schedule the last dry pass to end a few minutes before each bell, and place the dock outside the main traffic lanes.
How Loud Is Too Loud Next to a Classroom?
A robot like the PUDU CC1 runs below 70 dB, and the deciding factor is the sound level inside the classroom. Measure it at the door.
The Classroom Limit
The Acoustical Society of America’s classroom standard limits background noise in a typical unoccupied classroom to 35 dBA. The standard rests on research showing that children need speech at least 15 dB above the background noise. The limit is a design benchmark for empty rooms, and a lesson in progress sets its own noise level.
The Door Math
A closed classroom door cuts sound by about its STC rating. A door rated STC 30 cuts roughly 30 dB. Take the worst case. A robot rated at 70 dB, running directly beside a closed STC 30 door, leaves about 40 dB on the classroom side. The distance between the robot and the door lowers that figure further. Nothing replaces a measurement, so the test happens at the classroom door.
Where to Test First
Start with corridors beside music rooms, early-years classrooms, exam halls and libraries. In these corridors, Silent Mopping Mode turns the blower off for quieter dust mopping. Noise is only one consideration when cleaning around students. Facility teams must also account for obstacle detection, floor conditions, and safe movement through busy corridors.
Quick tip. Place a calibrated sound level meter inside the classroom door, run the robot past at working speed during a lesson, and keep the log.
Is It Safe to Run a Cleaning Robot Around Students?
A cleaning robot is safe around students when it meets IEC 63327, which buyers should confirm with the supplier, and its routes are set up for a school corridor.
What IEC 63327 Covers
IEC 63327 is the international safety standard for automatic floor treatment machines used indoors for commercial purposes. It states that these machines may operate near large groups of people, such as in shopping malls and schools. The standard addresses safety and leaves cleaning performance to other tests.
Sensors and Stopping
The CC1 combines main LiDAR, solid-state LiDAR, RGBD depth cameras, ultrasonic sensors, a bumper sensor, and a cliff sensor. Together, they detect people, furniture, and stair edges. When a student or staff member enters the path, the robot stops safely. The 70 cm passing width sets the narrowest gap the robot will pass through.
Wet Floors and Slip Risk
WorkSafeBC reports that slips, trips, and falls made up 18.6% of K-12 injury claims in British Columbia over five years, with more than 94,500 lost workdays. The agency names wet entrances as a common hazard. Run dry modes while students are in the building, and reserve scrub passes for empty halls.
Winter Salt and Slush Near Entrances
Winter carries salt and meltwater from the doors into the corridors. Start routes at the mat line and work inward. Keep the dock in a heated room, because the robot’s operating range is 1 to 40 °C.
Which Corridors Suit the PUDU CC1?
The CC1 suits wide corridors and commons. In multi-floor buildings, staff move it between floors. Corridors beside sensitive rooms and tight pinch points need a site assessment first.
CC1 Specifications
Running noise: Below 70 dB.
Passing width and turning width: 70 cm (over 75 cm preferred for long corridors) and 88 cm.
Cleaning path: 500 mm with side brush.
Coverage: Up to 1,000 m² per hour (700 to 1,000).
Runtime: 5 h scrubbing, 5 h sweeping, vacuuming and dust mopping, 4 h carpet vacuuming, 9 h in Silent Mopping Mode.
Charge time: Under 3 h.
Water tanks: 15 L clean, 15 L waste.
Operating temperature: 1 to 40 °C.
Carpeted Lecture Corridors
Carpet Vacuuming Mode handles low-pile carpet at a 4 hour runtime.
Pinch Points and Sensitive Rooms
Lockers, display cases, and door swings that narrow a corridor below 70 cm stop the robot. Corridors beside music rooms and early-years classrooms get a sound test before routes are locked. Once a robot fits the building, weigh its operational benefits against its costs.
Is a Corridor Cleaning Robot Worth It for a School or Campus?
A corridor robot pays off on long, continuous corridors and commons cleaned on a fixed schedule. Small schools with short halls take longer to recoup the cost.
Cleaning Frequency Gains
Spokane Public Schools bought 14 autonomous floor cleaning units, one for every middle and high school. Cleaning frequency rose from about once a week per school to at least three times a week. The robots logged more than 1,500 hours and 3,200 routes in the months after they were introduced in the 2025–26 school year, and the district says they are not replacing staff.
Custodian Time and Cleaning Records
A corridor robot takes over the repetitive floor passes. Custodians then spend that time on classrooms, washrooms, and detail work. Every task also creates a cleaning report showing area cleaned, time, water and power used. WorkSafeBC lists reviewing incident reports as one step in finding hazards, and a joint health and safety committee can read the cleaning logs beside those reports.
Cost Model
Multiply annual corridor floor hours by the loaded hourly rate in your collective agreement. Set the result against the purchase or lease cost, then add the coverage gain and floor life.
So How Do Schools Keep Corridors Clean During Class?
Schools keep corridors clean during class by running dry passes while students are present and scrub passes while halls are empty, then measuring sound at the classroom door. A robot like the PUDU CC1 runs below 70 dB, stops safely around students. IEC 63327 is a safety standard that includes schools, so ask for proof of compliance. Corridors beside music rooms and early-years classrooms need a direct assessment, because a spec sheet cannot replace a meter reading at the door. Book a demo to measure the robot at your own classroom doors.
