Annual Gas Safety & Internal Flue Inspection at a Luxury Apartment Block
In July 2023, SEM Facilities was appointed to conduct a comprehensive statutory compliance and maintenance programme at Thorney Court, a prestigious luxury apartment building.
The primary objectives of this project were twofold: to inspect and service the mechanical plant alongside three high-capacity commercial boilers, and to conduct a thorough internal inspection of the building’s complex flue system to ensure complete regulatory compliance and resident safety.
The Challenge: Inaccessible Internal Boiler Flues
The most significant obstacle our engineering team faced was the unique architectural design of the Thorney Court building. The commercial boiler flues ran vertically through the interior of the property across 14 floors.
Because these flues were not accessible from the exterior of the building, traditional external visual inspections were completely impossible. However, confirming the safety and structural integrity of the internal flue joints is a paramount regulatory requirement. This lack of physical access demanded an innovative, non-destructive solution to properly assess the network.
Our Solution: 14-Storey CCTV Flue Diagnostics
To overcome the access limitations, our team devised a highly effective, technology-led solution. Rather than attempting invasive access, we deployed a specialist, long-reach CCTV camera system to inspect the flue network internally from top to bottom.
This advanced diagnostic approach allowed our engineers to meticulously examine the entire 14-storey length of the flue without ever needing to step inside the residential areas or cause disruption to the tenants. We closely analysed every individual connection point where the flues converged, cross-referencing our live findings with data from previous inspections to monitor for any potential degradation or weak spots over time.
Meticulous Planning and Implementation
Executing a project of this scale within a high-end residential environment required extensive pre-works planning. The safety of our team and the building’s residents was our absolute priority.
Our engineers navigated tight plant room spaces and coordinated seamlessly with building management to ensure the project ran smoothly. Despite the unforeseen challenges of operating within a highly populated, luxury environment, our team adapted with the utmost professionalism to ensure minimal disruption.
Project Results & Total Compliance
The project concluded with highly positive results. The internal CCTV survey confirmed that the 14-storey flue system was in excellent condition, with no structural weaknesses or areas of concern identified.
Furthermore, all three commercial boilers successfully passed their statutory safety checks. This provided the building management with the vital assurance that their heating infrastructure was operating efficiently, reliably, and strictly in accordance with all safety regulations.
Project Summary at a Glance
- Location: Thorney Court (Luxury Residential Apartments).
- Date Completed: 31st July 2023.
- Service Provided: Annual gas safety inspection and internal flue inspection.
- Scope: Servicing of 3 commercial boilers and associated mechanical plant.
- Operational Challenge: Assessing inaccessible boiler flues running internally across 14 floors.
- The Solution: Deployment of a specialist long-reach CCTV camera for top-to-bottom internal diagnostics.
- Outcome: 100% compliance achieved, verifying the safety and efficiency of the heating infrastructure with zero disruption to residents.
Secure Your High-End Residential Block with SEM Facilities
Managing the plant rooms of luxury residential estates requires an engineering partner who understands the need for absolute safety, innovation, and discretion. From complex internal flue inspections to the servicing of high-capacity commercial boilers, our accredited engineers are equipped to handle the unique challenges of premium apartment blocks.
Need a specialist engineering contractor for your residential estate? Get in touch with our expert team today on +44 (0) 203 4750 999 or email admin@semfacilities.co.uk to discuss your compliance and preventative maintenance requirements.




