A ceiling can look complete while hiding a maintenance problem. A valve may sit above an inaccessible panel, an air-conditioning unit may have no practical replacement route, or a drainage pipe may compete with a structural member for the same space.
Mechanical, electrical and plumbing coordination should resolve these interfaces before finishes make them difficult to reach. Its purpose is to produce a building that can be installed, tested, operated and maintained.
Begin with how the building will be used
Ask the client and operators about occupancy, working hours, equipment, water use and the consequences of interruptions. An office, school, workshop and industrial facility do not have interchangeable requirements, even where the floor area is similar.
The Whole Building Design Guide’s commissioning documentation guidance separates owner requirements from the design team’s explanation of how those requirements will be met. Keeping those two records aligned helps prevent a well-drawn system from solving the wrong problem.
For a modest project, this can be a concise schedule: required service, operating expectation, design assumption and method of checking the result. The important feature is agreement, rather than document length.
Coordinate space, sequence and access
Overlay service routes with the architectural and structural information. Review risers, ceiling zones, drainage routes, equipment positions and penetrations together. A clash-free drawing is useful, but it does not establish that a component can be installed or maintained.
Use a review checklist that asks:
- Can each system be installed in the proposed sequence?
- Are openings and penetrations agreed with the relevant designers?
- Can filters, valves, controls and inspection points be reached?
- Is there a workable route for replacing major equipment?
- Are isolation points understandable and accessible?
- Have interfaces with fire protection and compartmentation been coordinated?
An illustrative example is a pump above a suspended ceiling. Its footprint may fit, but the team must also consider connections, supports, access, noise, drainage and how it will eventually be removed. Recording those questions early is usually more useful than discovering them during a repair.
Give every unresolved interface an owner
Maintain an issue register with a location, drawing reference, responsible person, required decision and due date. “Coordinate on site” is not a resolution where a decision affects structural work, equipment selection or a finish that will soon be closed.
When a supplier proposes a substitution, compare its dimensions, electrical demand, controls, connections and maintenance requirements against the coordinated design. A product that appears equivalent in a quotation may change several interfaces.
Keep approved revisions distinguishable from superseded drawings. The team installing the work should be able to identify the current information without relying on a message buried in a group chat.
Plan commissioning while the systems are still being designed
CIBSE Commissioning Code M emphasises operational readiness at handover and performance that meets the needs of users, operators and maintainers. Commissioning therefore needs time, responsibilities and acceptance criteria in the programme.
Agree which installation checks, tests and functional demonstrations are needed, who performs them and who reviews the evidence. The WBDG commissioning process guidance describes activities extending through design review, construction verification and system testing. Treat that sequence as a management principle; the actual scope should suit the project.
Where systems interact, discuss how those interactions will be demonstrated. Showing that individual items switch on does not necessarily establish that controls, alarms or operating modes work together as intended.
Make closing-up a deliberate checkpoint
Before ceilings, shafts or wall finishes conceal services, review the agreed inspection and testing requirements. Record what has been checked, what remains outstanding and who has authorised the next stage. Photographs can help locate concealed routes later, but should support a traceable record rather than replace inspection.
Hand over information that the operator can use
Request accurate installation records, equipment schedules, test results, control descriptions, warranties, maintenance instructions and operator training. Identify unresolved defects and the arrangements for completing them.
The test of coordination continues after construction: can the operator locate an isolation point, understand an alarm and arrange maintenance without unnecessary disruption? A design review that asks those questions has value long after the ceiling is closed.
Planning work on your site? Discuss your project with EEACL, including the location, intended use and any drawings or photographs already available.
Research checked 9 October 2026. This article supports project planning; specifications, testing and approvals must be agreed for the actual site and intended use. Photographs are illustrative images from the EEACL portfolio.
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