Ceilings, lighting, partitions and building services all compete for the same space. This guide explains how clashes arise, why they are cheapest to solve on paper, and how to keep services accessible for maintenance. It uses the common term MEP, meaning mechanical, electrical and plumbing, only as a label.
What is a services clash
A clash is when two things are drawn or built to occupy the same place: a duct against a beam, a light fitting against a pipe, a partition against a fixed unit. Found on drawings, it costs a conversation; found on site, it can mean removing and rebuilding.
Why coordinate before installation
- Ceiling heights depend on what runs above them.
- Light positions, outlets and grilles need to line up with the layout below.
- Changes after installation cost more and delay other trades.
Who should review technical changes
Any change to a building service should be reviewed by the party responsible for that system and, where it applies, by someone qualified for it. Specialist systems such as air conditioning and fire protection are coordinated through qualified specialists.
Planning access for maintenance
Access panels, clear service zones and labelled isolation points are small additions at design stage and large savings for whoever maintains the space later.
Questions clients ask
Why coordinate before installation?
Because fixing a clash on a drawing is far cheaper and faster than fixing it in a built ceiling or wall.
How should access for maintenance be planned?
By placing access panels and clear zones where equipment needs servicing, and marking isolation points.
How SADEED coordinates services
SADEED coordinates electrical and plumbing within its licensed scope and brings in qualified specialists for other systems, reviewing the information together before installation.
Planning a fit-out with complex services?
Related guides
- How Trade Coordination Helps Keep Fit-Out Work Moving
- How to Reduce Rework in Commercial Fit-Out Projects
- Quality Control in Interior Fit-Out: What Should Be Checked and When?
- Design & Build programme
- Request a site visit
Last reviewed: October 2026. This guide is general information; requirements vary by property, scope and authority.