Asset History Report

Complete maintenance history for Aldgate Central Library roof (NE section). 3 calls in 7 months, escalating costs, root-cause analysis, and permanent repair recommendation.

CLIENT: Aldgate Borough Council · 42 buildings
REFERENCE: ALD-AHR-LIB001-ROOF-NE
PREPARED BY: Sentinel FM Ltd (via Built AI)
PERIOD: May 2026 · Month 18

ASSET HISTORY

Aldgate Central Library — Roof (NE Section)

Complete maintenance history for the northeast roof section. 3 reactive calls in 7 months, escalating in severity. Pattern: temporary repairs failing, root cause unresolved, costs accumulating.

Ticket	Date	Fault	Action	Engineer	Cost	Outcome
TKT-01204	14 Oct 25	Minor leak, NE corner	Temporary felt patch externally	S. Ahmed	£120	Temp fix
TKT-02891	22 Jan 26	Leak recurrence after heavy rain	Silicone sealant to flashing lap joint	D. Okonkwo	£85	Temp fix
TKT-03847	13 May 26	Active ingress — saturated tiles, pooling	Flashing tape ext. + ceiling tiles int.	D. Okonkwo	£161	Temp fix

CALLS IN 7 MONTHS

£366

CUMULATIVE REPAIR COST

£1,800

EST. PERMANENT FIX

2.9 yrs

PAYBACK PERIOD

Recommendation — permanent repair: The temporary repair cost trajectory (£366 over 7 months = £627/year) means the permanent fix (£1,800) pays for itself within 2.9 years. Given the escalating severity (each call worse than the last), the risk to a Grade II listed building interior (heritage flooring, period plasterwork), and the operational disruption (public area closures), permanent repair is the clear recommendation. WO-2026-00847 raised. Awaiting listed building consent.

Root cause (confirmed by D. Okonkwo, 13 May): Corroded lead flashing at the valley gutter lap joint. Approximately 600mm of degraded Code 4 lead allowing water ingress during sustained rainfall. Previous repairs (felt, silicone, flashing tape) addressed the symptom but not the cause. Full replacement with Code 5 lead required.