Preventive maintenance is scheduled maintenance performed on a fixed interval or usage trigger to keep equipment and building systems running before they fail. Instead of waiting for a breakdown, a facility team services an asset on a defined cadence, such as replacing filters every quarter or inspecting a rooftop unit twice a year. The goal is to catch wear early, reduce unplanned downtime, and extend the useful life of each asset.

This guide explains what preventive maintenance is, how it differs from reactive maintenance, why facility teams rely on it, the common types, and how teams track it across buildings and assets.

How preventive maintenance differs from reactive maintenance

Reactive maintenance happens after something breaks. A pump fails, a tenant submits a complaint, and a technician responds. Preventive maintenance happens on a schedule, before failure, based on time or usage.

Most facility teams run both. Reactive work will always exist, but a preventive program shifts a larger share of the workload into planned tasks that are cheaper and less disruptive than emergency repairs. For a full comparison of maintenance strategies, see Types of Maintenance.

Why facility teams use preventive maintenance

A preventive program supports several operational goals:

• Fewer unplanned failures. Servicing assets on a cadence catches wear before it becomes a breakdown.

• Longer asset life. Regular service slows degradation and defers capital replacement.

• Predictable labor and budget. Scheduled tasks let a team plan technician time and forecast costs instead of reacting to emergencies.

• Compliance and safety. Many systems, such as fire and life-safety equipment, require documented inspections on a set interval.

• A complete service record. Each completed task builds a history that supports warranty claims and condition assessments.

Common types of preventive maintenance

Preventive maintenance is usually triggered in one of three ways:

• Time-based. Work is scheduled on a calendar interval, such as monthly, quarterly, or annually.

• Usage-based. Work is triggered by a meter or runtime, such as hours of operation or cycles.

• Condition-based. Work is triggered by a measured condition, such as vibration or temperature, that signals developing wear.

Condition-based maintenance overlaps with predictive maintenance, which uses sensor data and analysis to estimate when a failure is likely. Types of Maintenance covers how these categories relate.

What a preventive maintenance program includes

A preventive program is more than a list of tasks. It defines which assets are in scope, the standard task for each asset, the schedule or trigger, who performs the work, and how completion is recorded. Setting this up is its own process. For a step-by-step guide to building and running a program, see Preventive Maintenance Program in Facilities Operations.

How facility teams track preventive maintenance

Small teams sometimes track preventive maintenance in a spreadsheet or a shared calendar, but that approach breaks down as the number of assets and buildings grows. Recurring tasks are easy to miss, completion is hard to prove, and the service history ends up scattered across files.

A structured system links each preventive task to a specific asset, generates the work order on schedule, and records completion against that asset. Layer supports this by connecting preventive tasks to an asset register and generating recurring work orders, so the schedule, the responsible technician, and the service history stay in one place.

Further Resources

• Preventive Maintenance Program in Facilities Operations explains how to set up and run a program end to end.

• Types of Maintenance, Reactive, Corrective, Preventive, Predictive compares the four maintenance strategies.

• How to Build an Asset Register for Facilities Operations covers the asset data a preventive program depends on.

• Work Order Management Guide, From Request to Closeout covers how preventive tasks become trackable work orders.