Every call-out on one asset, in one record
The recorded maintenance history of a single asset, with historical references awaiting reconciliation - the northeast roof valley gutter at Aldgate Central Library. Three reactive calls in seven months, the cost of holding it on temporary repairs, the confirmed root cause, and the case for renewing it properly.
- Client
- Aldgate Borough Council
- Asset
- Aldgate Central Library · NE roof valley gutter
- Reference
- ALD-AHR-M18
- Reporting period
- 1 - 31 May 2026 · Month 18
- Prepared by
- Sentinel FM Ltd · via BuiltAI
- Portfolio
- 42 buildings · term maintenance
Illustrative example: fictional project and parties.
One asset, its whole history
An asset history report is the complete maintenance record of a single asset: every reactive call-out and every planned task logged against it, in date order, for as long as it stays in management. Aldgate Borough Council runs term maintenance across 42 buildings. This report isolates the asset whose recurring calls prompted review - the northeast roof valley gutter at Aldgate Central Library.
Every entry on this asset to date is reactive; it carries no planned-maintenance task in its schedule yet. Three separate call-outs in seven months is what brought it to review.
The history is append-only. A superseded entry is corrected by a later one, never removed, so a recurring fault stays visible across different engineers, seasons and reporting periods. That is what turns three separate tickets into one decision.
The maintenance history
Every call-out logged against this asset, in date order, with the fault reported, the action taken, the attending engineer and the cost booked. Read down the column and the pattern is plain: the same fault, returning.
| Ticket | Date | Fault reported | Action taken | Engineer | Cost | Outcome |
|---|---|---|---|---|---|---|
| TKT-2026-01204 | 14 Oct 25 | Minor leak, NE corner | Temporary felt patch, external | S. Ahmed | £120 | Temp fix |
| TKT-2026-02891 | 22 Jan 26 | Leak recurrence after heavy rain | Silicone sealant to flashing lap joint | D. Okonkwo | £85 | Temp fix |
| TKT-2026-03847 | 13 May 26 | Active ingress - saturated tiles, pooling | Flashing tape external, ceiling tiles internal | D. Okonkwo | £161 | Temp fix |
| Cumulative to date · 3 reactive calls in 7 months | £366 | Unresolved | ||||
Historical ID check pending: the October and January events use 2025/2026 year-prefix variants for 01204 and 02891 across the linked records. Dates, repairs and costs are retained; no canonical predecessor ID is established.
One cause behind three calls
The third call-out confirmed what the first two had only hinted at: the temporary repairs were sealing a surface while the real fault sat underneath it.
- The fault
- Corroded lead flashing at the valley gutter lap joint - approximately 600mm of degraded Code 4 lead, letting water in during sustained rainfall.
- Confirmed by
- D. Okonkwo, on site for the third call-out (TKT-2026-03847, logged P2) on 13 May 2026.
- Why it recurs
- Each temporary repair - felt patch, then silicone sealant, then flashing tape - sealed the surface and left the lead in place. Every spell of heavy rain reopens the same path.
- What is at risk
- Aldgate Central Library is Grade II listed. The roof void sits above heritage flooring and period plasterwork, so ingress threatens the building fabric, not only the ceiling tiles replaced on the last visit.
- Permanent remedy
- Full replacement of the degraded run in Code 5 lead to the valley gutter and lap joint, ending the recurrence at source.
- Works order
- WO-2026-00847 raised. Awaiting listed building consent before works can proceed.
The case for a permanent repair
Held on temporary repairs, this asset costs money every few months and puts a listed interior at risk each time it rains hard. Renewed properly, the fault closes.
| Measure | Amount |
|---|---|
| Temporary repairs to date (3 calls, Oct 2025 to May 2026) | £366 |
| Annualised at the current rate | £627 / year |
| Estimated permanent repair (Code 5 lead renewal) | £1,800 |
| Payback on the permanent repair | 2.9 years |
Renew the failed run in Code 5 lead rather than fund a fourth temporary patch. At the current rate the temporary repairs cost about £627 a year, and each recurrence risks the Grade II listed interior below - heritage flooring and period plasterwork - and closes a public area of the library. The £1,800 permanent repair pays for itself inside 2.9 years and removes the risk. Works order WO-2026-00847 has been raised and is awaiting listed building consent before works can proceed.
This asset carries no planned-maintenance task today. Once the lead is renewed, add an annual pre-winter roof-valley inspection to the PPM schedule, so the next sign of failure is caught on a planned visit rather than a reactive call-out and a closed public area.