Building Maintenance Essentials

A building maintenance technician keeps a whole building working: lights, water, heat, doors, roofs, and everything between. Nobody thanks you when it all works, and everybody calls when it does not. What sets a strong tech apart is not knowing every repair. It is knowing how to set priorities, how to catch small problems early, and when to call in a specialist. This is the planning side of the trade. Repair skills build on top of it.

What You Will Be Able to Do

• Work through a list of requests in the right order
• Use a CMMS to track work and preventive maintenance
• Explain why deferred maintenance costs more
• Care for filters and thermostats and report HVAC faults
• Check roofs and life safety equipment on schedule
• Manage keys and respond to emergencies

How Good Techs Think

• Diagnose before you repair. Replacing a part without knowing why it failed leads to a callback. A flapper that keeps failing may point to high water pressure.
• Match the parts. When you pick a replacement part, match the manufacturer's specs. Compatibility, safety, and code compliance matter more than price or convenience. A close-enough part can void a listing or fail in service.
• Write it down. Log work, note model numbers, and take a photo before you take something apart.
• Know your limits. Some work needs a licensed plumber, electrician, HVAC tech, or elevator company. Calling one is good judgment. Rules also vary by state, and your employer decides what you are authorized to do.

A good bag holds a multi-bit screwdriver, adjustable wrench, tongue-and-groove pliers, tape measure, voltage tester, flashlight, utility knife, and notepad.

Work Orders

Every request should become a work order, even a small one. This creates a record, shows patterns, and keeps things from being forgotten.

Set priorities in this order:

1. Life safety: Gas smells, fire system faults, exposed live wires
2. Water and property damage: Active leaks and floods
3. Building function: Loss of heat, cooling, power, or restrooms
4. Comfort: Temperature complaints
5. Cosmetic: Scuffs and small paint jobs

When you close a work order, record what you found, what you did, what parts you used, and how long it took. If the same toilet comes back each month, you have not solved the problem.

CMMS

A computerized maintenance management system (CMMS) is software that tracks work orders, schedules preventive maintenance, manages parts inventory, and records each asset's history. Many techs use it on a phone or tablet. Records are only as good as what you enter. Finish your notes the same day.

Preventive Maintenance

Preventive maintenance (PM) means doing scheduled work so that equipment does not break. It is far cheaper than emergency repairs, and it helps equipment last longer. Replacing a belt on schedule takes minutes. Replacing a burned-out motor on a hot Friday takes much longer and costs far more.

A healthy program tracks PM compliance, which is the share of scheduled PMs finished on time. A target of 90 percent or higher is common.

Worked example. Your CMMS shows 120 PM tasks due this month, and 111 were finished on time. 111 divided by 120 is 92.5 percent, which meets the target. If that falls to 80 percent, you need to look at staffing or scheduling.

Sample PM Schedule

Specialists handle many of these jobs. Licensed firms inspect fire systems, elevators, and backflow assemblies, and local rules set how often. Keep the reports in your records.

Deferred Maintenance

Deferred maintenance is work that gets put off, usually to save money. It looks like savings, but small problems compound. A small roof leak that gets ignored ruins insulation and ceilings, then leads to mold. Soon it is an expensive failure and a safety risk. Keep a list of deferred items and share it with management, so that the risk is clear.

HVAC Basics

Heating, ventilation, and air conditioning (HVAC) is mostly specialist work, but you handle the routine jobs.

Filters

Check filters in a commercial building every month, and replace them every 1 to 3 months as needed. Thin filters have less surface area, so a 1-inch filter loads up faster than a 4-inch pleated filter.

1. Turn the unit off if you need to, and open the filter access.
2. Note the size printed on the old filter.
3. Install the new filter with the airflow arrow pointing toward the blower, away from the return duct.
4. Write the date on the frame.

Thermostats

Many offices run at about 68 to 76 F during occupied hours, with setbacks when the building is empty. A setback saves energy by letting the temperature drift overnight or on weekends.

Building Automation

A building automation system (BAS) monitors and controls HVAC, lighting, and other systems from one place. It saves energy by following schedules and helps find faults through alarms. Learn how to view alarms and check schedules. Do not override settings without permission. Overrides left in place waste energy for months.

Report to a Specialist

• Ice on refrigerant lines, or warm air from AC
• Grinding, banging, or screeching from a fan or compressor
• A unit turning on and off rapidly
• Electrical trouble at a disconnect
• Any gas smell

Roofs and Water

Inspect the roof at least twice a year and after major weather. You are looking for damage before it turns into a leak.

• Clear drains and gutters.
• Look for ponding water, cracked seams, and blisters.
• Check flashing around vents and equipment.
• Keep a log with photos.

Use fall protection and your site's roof access rules. Do not go near an edge or a skylight without protection.

Your building also has a backflow preventer on the water supply. Its job is to keep contaminated building water from flowing back into the public water supply. A certified tester checks it each year. Report any steady water from its relief port, and never plug the port.

If your site has water heaters, drain 2 to 3 gallons through the drain valve each year to flush sediment, and keep the setting near 120 F.

Life Safety Systems

Fire and safety equipment protects lives. Follow your site's plan and records.

• Sprinklers: These control or put out a fire early. Each head opens on its own at its rated temperature, so a fire usually sets off only the closest heads. Movies get this wrong. Do not paint heads, hang anything from them, or stack items close under them.
• Fire extinguishers: Check monthly that the pressure gauge is in the green, the pin is in, and the tag is current.
• Exit and emergency lights: Press the test button monthly for about 30 seconds, and report failures.
• Fire alarms: Tests are done by qualified people. Warn the monitoring company and building occupants first.
• Fire doors: Must close and latch. Never prop them open.

Never turn off a fire system without following your site's procedure. If a system is out of service, your site must have a plan, often called a fire watch.

Keys and Access

Keys protect people and property. A good system uses a master key system with a restricted keyway, so that keys cannot be copied at a regular store. Keep a key log showing who holds which key, audit it regularly, and rekey when keys are lost. Collect keys and cards from people who leave.

Emergencies

Gas smell: Evacuate the area right away. Do not operate switches. Call the gas company and 911 from outside.

Water leak: Know where the main and zone shutoffs are. Stop the water first, then call for cleanup. Protect electrical equipment, and stay out of standing water if power may be on.

Power loss: Check whether it is the whole building or one area. Do not reset anything until you know why it tripped.

Fire: Pull the alarm, get out, and call 911.

Know where every shutoff is before you need it. Label main valves and panels, and keep a building map.

Common Mistakes

Check Your Understanding

1. You get a call about a scuffed wall, a slow leak over a server room, and a smell of gas in a stairwell. What order do you take them in?

Gas first, because it is a life safety issue. Then the leak, because it is damaging property. Then the scuff.

2. Your PM report shows 95 of 125 tasks done on time. Is that healthy?

95 divided by 125 is 76 percent. That is well under the common 90 percent target, so something needs to change.

3. A manager wants to skip roof inspections to save money. What do you tell them?

That is deferred maintenance. A missed crack can become a leak that ruins ceilings and insulation. The inspection is much cheaper.

4. Someone loses a master key. What should happen?

Log it, report it, and rekey the affected locks.

Key Takeaways

• Work life safety first, then water damage, then comfort.
• Use a CMMS to track work orders, PMs, and history.
• PM compliance of 90 percent or higher shows a healthy program.
• Deferred maintenance compounds. Keep small problems small.
• Check filters monthly, and point the airflow arrow toward the blower.
• Inspect roofs at least twice a year and after major weather.