Overview
Risers and plant areas change over time: additional services get installed, penetrations get widened, and making-good can be inconsistent. That’s why these areas are common locations for passive fire breaches.
What to focus on when inspecting
In risers and plant spaces, “neat” isn’t the same as “compliant”. Focus on:
- the opening (size/shape)
- the services (type/material)
- the substrate (wall/floor construction)
- the system used to reinstate the line
If any of those are unknown, treat it as a risk and escalate for competent review.
Common defects
| Defect type | What it looks like | Why it matters |
|---|---|---|
| Unsealed penetrations | Gaps around cables/pipes/tray | Breach of a fire-resisting line |
| Unsuitable materials | Foam/loose mortar with no system | Often untested and hard to defend |
| Missing collars/wraps | Plastic pipe with sealant only | Pipe can melt away, leaving a void |
| Oversized openings | “Made bigger” later with partial making-good | Harder to reinstate without a proper system |
| Poor riser linings/boxing | Missing boards, gaps at edges | Hidden paths within the shaft |
| No records/labelling | No system details, no IDs/photos | Creates rework and repeat defects |
Additional common issues we see (depending on access and building type):
- multiple service types through one opening with no clear system solution
- damaged or missing access hatch seals and frames (where relevant)
- missing compartmentation above ceilings within riser cupboards
How to turn findings into a practical remedial plan
The difference between “a list of problems” and “a plan” is structure.
Step 1: Create a defect register
Your register should include:
- a unique reference
- a location string that someone can physically find (block/level/riser ID/face)
- service type(s)
- defect description
- priority and recommended next action
Step 2: Package remedials sensibly
For procurement and delivery, group by:
- area (riser/plant room)
- access constraints
- service types (so installers can prepare correct systems)
A simple priority guide
This isn’t a substitute for competent judgement, but it’s a useful starting point for programme planning.
| Priority | Typical indicators | Next action |
|---|---|---|
| Urgent | Large unsealed openings, multiple floors connected, high-risk area (stair/escape routes, main risers) | Make safe and scope remedials quickly; document constraints |
| Planned | Smaller breaches in lower-risk areas with good access | Schedule into a remedial package; keep a target date |
| Monitor / confirm | Unclear system, limited access, needs intrusive check | Agree next inspection step and assumption clearly |
Step 3: Close-out evidence
At minimum, retain:
- before/after photos where useful
- a note of what was installed
- confirmation of exclusions and constraints
How it works
- Survey — targeted inspection of risers/plant areas.
- Record — defect register with precise locations and photos where helpful.
- Prioritise — urgent vs planned, aligned to the fire risk assessment.
- Remediate — using suitable, tested systems installed correctly.
- Close out — evidence pack linked back to the register.
High-risk patterns we see
- “Swiss cheese” riser walls with multiple unsealed openings around cable trays
- large builders work openings left oversized with partial making-good
- mixed service penetrations (pipes + cables + ducts) treated as one generic seal
- repeated maintenance visits creating new small breaches that never make it into a register
How to prevent repeat breaches
Once a riser is brought back to a reasonable baseline, keep it there:
- give each riser a clear ID and label faces internally
- require any new penetration to be made good immediately (not “later”)
- define who is allowed to create penetrations and what evidence they must provide
- add simple periodic checks of risers/plant areas into planned maintenance
If you run multiple contractors on a live site, the simplest control is a handover rule: no new penetration is “complete” until it’s made good, photographed, and added to the register.
What to photograph and record
To make close-out defensible, capture evidence that shows:
- the opening and service types before works
- the finished seal after works (wide shot + close-up)
- the location reference (label, riser ID, level) so evidence can’t be misfiled
What to include in a works pack (so contractors can price fairly)
| Item | Why it prevents rework |
|---|---|
| Register export with IDs/locations | Stops “we couldn’t find it” disputes |
| Access rules (escorts, hours, permits) | Reduces delays and aborted visits |
| Assumptions/exclusions | Prevents scope creep and arguments |
| Making-good responsibilities | Clarifies who reinstates boxing/finishes |
FAQs
Why do we keep seeing new defects after “we fixed the risers”?
Because risers are live service routes. Without a maintained register and a control process for future penetrations, new works will create new breaches.
Can our general maintenance team patch small openings?
Only if the correct system is known, the installer is competent, and the work is recorded. Ad-hoc materials and untested “stuffing” are common causes of non-compliance.
What’s the simplest way to reduce repeat issues?
Number risers and faces, keep a defect register, and require any new penetrations to be made good to an agreed standard with evidence.
Do we need to label fire stopping?
Labelling can help future maintenance teams avoid disturbing compliant seals and can make audits easier. At a minimum, make sure your register and photos make it clear what was installed and where, so future works don’t accidentally remove or damage it.