Thousands of UK high-rise blocks need fire safety upgrades. We examine the challenges of retrofitting compartmentation, detection, and suppression into occupied buildings.. The Retrofit Challenge Post Grenfell, thousands of UK residential high rises require significant fire safety upgrades while remaining occupied. Common Retrofit Works 1. Cladding removal and replacement — ACM, HPL, and other combustible systems 2. Compartmentation surveys and remediation — addressing decades of fire stopping failures 3. Fire alarm upgrades — from basic systems to L1 detection 4. Sprinkler retrofit — BS 9251 residential sprinkler systems 5. Fire door replacement — replacing non compliant flat entrance doors 6. Evacuation alert systems — for buildings transitioning from stay put 7. Dry riser installation or upgrade — for firefighting water supply Technical Challenges Working in occupied buildings — access, disruption, consent Hidden construction — unknown conditions behind walls and floors Asbestos — frequently encountered in buildings built before 2000 Service penetrations — thousands of unrecorded penetrations through fire barriers Water supply — sprinkler retrofit may require infrastructure upgrades Funding Building Safety Fund — government funding for cladding remediation Leaseholder protections — BSA 2022 caps leaseholder contributions Developer remediation contracts — 49 developers signed self remediation pledge Social housing funding — allocated through DLUHC For high rise retrofit fire engineering, contact us.