A data centre that has been commissioned and handed over to operations is at the start of a 20 to 25 year asset life during which the facility management programme determines whether the infrastructure performs to its contracted specifications, whether the customer SLAs are met, and whether the asset retains its value through successive investment cycles.
Data centre FM is not general facility management applied to a specialist building. The critical systems — UPS, cooling plant, generators, fire suppression, structured cabling, physical security — require specialist maintenance programmes, specialist engineers, and specialist contract structures that most general FM providers are not resourced to deliver. The gap between what a general FM provider offers and what a data centre FM programme requires is most visible at the point of a critical systems failure — when the UPS fails to transfer load under a mains failure, or when the cooling system trips under peak load conditions, the FM provider’s response time and technical capability determine whether the event is a brief operational disruption or a prolonged SLA breach.
This article covers what operational management looks like for a live UK colocation asset — from PPM schedules and SLA structure through to remote hands, critical systems maintenance, and how FM partner selection shapes asset performance and value.
The scope of data centre FM
Critical systems maintenance
The critical systems in a colocation data centre — UPS systems, generators, cooling plant, HV and LV switchgear, fire suppression, and physical security infrastructure — all carry manufacturer-specified maintenance intervals and procedures. A PPM (Planned Preventive Maintenance) schedule that is aligned with manufacturer specifications and regulatory requirements is the foundation of a compliant FM programme.
UPS systems require quarterly battery impedance testing, annual discharge testing, and periodic full replacement of battery strings on a cycle that depends on the chemistry and operating temperature. Cooling systems — particularly chilled water plants and cooling towers — require seasonal maintenance, water treatment management, and inspection regimes that reflect the regulatory requirements under Legionella guidance. Generators require monthly exercise runs, annual load bank testing at full capacity, and periodic major services. Deferred maintenance on any of these systems is consistently the most common infrastructure-related finding in data centre acquisition due diligence, and it accumulates in facilities where the FM programme is managed to a budget rather than to a specification.
Operational monitoring and DCIM
A data centre without a real-time monitoring capability across its critical systems is operating blind. Data Centre Infrastructure Management (DCIM) software — which monitors power, cooling, environmental conditions, and physical security across the facility — is the operational layer that enables the FM team to identify developing problems before they become failures and to demonstrate SLA compliance to customers.
The monitoring scope in a modern colocation facility covers: power consumption at PDU, rack, and cage level; cooling system performance including supply and return air temperatures and chilled water supply and return conditions; UPS status and battery health; generator fuel levels and status; environmental conditions including temperature, humidity, and leak detection; and physical access events. The alerts from this monitoring layer need to go to an FM team that is resourced to respond to them at any hour, not to a helpdesk that logs them for next-day review.
Remote hands
Remote hands — the physical support provided to customers by the FM operations team for equipment racking and stacking, cabling, and routine intervention tasks — is a contractual commitment in most colocation agreements and a significant operational overhead for the FM team. The response time commitment for remote hands is typically defined in the customer contract and forms part of the SLA structure.
For operators running multi-tenanted facilities, the remote hands demand across a diverse customer base requires an FM operations team that is large enough to absorb peak demand without breaching response time commitments. An FM programme that is staffed for average demand will fail its SLA obligations when multiple customers raise simultaneous remote hands requests.
SLA structure and FM accountability
What SLAs actually require from FM
A colocation SLA typically commits the operator to a power availability figure — 99.982% (Tier III equivalent) or 99.9999% (Tier IV equivalent) — and a cooling performance specification at defined IT load levels. The SLA is only as good as the FM programme that maintains the infrastructure it describes. An operator who has contracted to deliver 99.982% uptime without a PPM programme that can actually sustain that performance level is carrying a liability that is not visible until the first major incident.
The financial consequences of SLA breach vary significantly between colocation contracts. Some agreements include service credit provisions that cap the operator’s financial exposure at a fraction of monthly charges. Others — particularly for mission-critical customers — include consequential loss provisions that expose the operator to claims for business interruption losses that may be multiples of the facility’s annual revenue from that customer. FM partner selection and PPM programme quality are direct inputs to the operator’s financial risk profile.
FM contract structure
Data centre FM is typically delivered through a combination of specialist maintenance contracts for critical systems and a broader FM management contract that coordinates the full scope of services. The specialist maintenance contracts — UPS maintenance, cooling plant maintenance, generator maintenance, fire suppression testing — are usually placed directly with the system manufacturer or an accredited specialist contractor. The FM management contract provides the operational management layer, the helpdesk function, the remote hands team, and the DCIM monitoring capability.
The contract structure for FM services needs to reflect the criticality of what is being maintained. SLAs for the FM provider’s response times, technical capability standards, engineer certification requirements, and the insurance and liability structure of the arrangement should all be specified. An FM contract that is structured like a commercial property management agreement — with response times measured in hours and liability caps set at the annual contract value — is not appropriate for a facility whose customers are running production infrastructure.
Energy management and sustainability
Power Usage Effectiveness (PUE) — the ratio of total facility power consumption to IT load power — is the primary energy efficiency metric for colocation operations. A facility with a PUE of 1.5 is using 50% more power than its IT load requires; a best-in-class AI-ready facility targets PUE of 1.2 or below. The FM programme is directly responsible for the PUE performance through the management of the cooling system operating parameters.
In the current market, PUE performance has commercial significance beyond its engineering definition. ESG reporting requirements for customers — particularly large enterprise and hyperscaler offtakers — create demand for certified energy efficiency data that supports their Scope 3 emissions reporting. An operator who can demonstrate consistent, independently verified PUE performance within the range committed at lease inception is better positioned to retain and renew enterprise customers than one who cannot.
Water usage is a growing area of FM oversight, particularly for facilities using evaporative cooling. The water usage effectiveness (WUE) metric, environmental permit compliance for cooling tower operation, and the management of Legionella risk under HSE guidance all sit within the FM programme scope. The Buckinghamshire Foxglove case has made it clear that environmental commitments made in planning applications are enforceable against the operator post-completion — the FM team is responsible for demonstrating that those commitments are being met.
FM partner selection
The selection of an FM partner for a live colocation asset should be treated with the same rigour as the selection of a main contractor for the construction phase. The consequences of a poor FM partner — missed PPM intervals, slow critical systems response, inadequate DCIM monitoring — emerge slowly but compound over time. They are visible in the maintenance records during an acquisition due diligence process, and they are priced in.
The criteria for FM partner assessment cover: demonstrated data centre experience at comparable specification and scale; technical capability and engineer certification across the critical systems the facility operates; DCIM capability and the monitoring platform proposed; helpdesk and remote hands staffing model and response time performance; insurance and liability structure; and references from comparable live colocation operations.
General FM providers with no data centre track record should not be shortlisted for data centre FM appointments, regardless of their performance in commercial property or industrial FM. The technical requirements, the regulatory obligations, and the commercial consequences of failure are all materially different from those in general FM — and the learning curve for a provider without sector experience is paid for by the operator and their customers, not by the FM provider.
Armason: FM coordination and MSP delivery for UK data centre operators
Armason works with operators and investors to identify, appoint, and manage specialist FM partners for live UK colocation assets. We hold the partner network — specialist critical systems maintenance providers, DCIM platform operators, remote hands teams, and energy management consultants — and we coordinate across the full FM scope.
If you are looking at FM provision for a live or newly commissioned UK colocation asset, contact the Armason team.
Related reading
· Data centre construction management UK: how development programmes are delivered and where they fail
· Data centre due diligence in the UK: what buyers, operators, and investors need to assess
· Selling a data centre in the UK: valuation, process, and how to find the right buyer
· Data centre colocation procurement UK: how enterprise organisations actually source capacity in 2026
Sources referenced in this article
· Data Center Construction Cost Index 2026 — Turner & Townsend
· Technical due diligence checklist for data centres — Desapex
· Data centre tiers explained: Tier 1 to Tier 4 — Cagelab
· Unlocking value in UK data centre M&A transactions — BCLP
· Energy: the gatekeeper for UK data centre delivery — Savills
· Data centre valuation services — CBRE UK
· Government concedes Buckinghamshire data centre judicial review — Gowling WLG
