SFG20 Explained: The Standard for Building Maintenance
SFG20 is the recognised industry standard for planned preventive maintenance in the UK. This guide explains what it covers, how its colour-coded schedules work, and how FM teams use it to plan compliant, efficient maintenance.
In short
SFG20 is the UK's industry-standard library of planned preventive maintenance schedules, published by the Building Engineering Services Association (BESA). It defines what maintenance tasks each type of building asset needs, how often, and which are statutory — giving FM teams a recognised baseline for compliant maintenance regimes.
What SFG20 actually is
SFG20 is a continually updated digital library of maintenance schedules covering thousands of asset types — from boilers and AHUs to fire dampers and lifts. Each schedule lists the individual maintenance tasks for that asset, the recommended frequency, the skill level required, and an estimated time. It is maintained by BESA and updated as standards and legislation change, so subscribers always work from a current specification rather than a static document that drifts out of date.
Because it is recognised across the industry, SFG20 acts as a common language between clients, consultants, and maintenance contractors. When a contract specifies maintenance 'to SFG20', everyone understands what that means and can measure delivery against it.
How the colour coding works
SFG20 tasks are colour-coded by criticality so teams can prioritise. The colours distinguish statutory (legally required) tasks from those that are mandatory under other rules, optimal best practice, or discretionary. This lets an FM team and client agree a maintenance regime that always covers the legal minimum while making informed decisions about the rest based on risk and budget.
- Red / statutory — tasks required by law (e.g. certain fire and pressure-system checks)
- Pink / mandatory — required by an authority or standard but not primary legislation
- Amber / optimal — best-practice tasks that protect reliability and efficiency
- Green / discretionary — tasks that can be adjusted based on risk and budget
How FM teams use SFG20
FM teams use SFG20 to build their planned preventive maintenance (PPM) regime: selecting the relevant asset schedules, agreeing which task tiers to deliver, and loading the resulting task lists into a CAFM system as recurring work orders. It underpins maintenance contracts, helps demonstrate statutory compliance, and provides a defensible basis for the maintenance plan if a client, auditor, or insurer asks why a regime is set up the way it is.
The schedules tell you what to do and when; you still need the asset's own O&M manual for the specifics — model numbers, settings, isolation points, and manufacturer requirements. Being able to find that information quickly across hundreds of documents is where an AI assistant over your O&M library complements an SFG20-based regime.
Frequently asked questions
Turn your O&M manuals into instant answers
SFG20 tells your team what to maintain. PM Assist helps them find the how — settings, isolation points, and manufacturer detail — across all your O&M manuals in seconds.
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