Older buildings present unique fire safety challenges. This guide covers practical retrofit solutions for pre-1990s buildings that don't meet modern standards.. The Retrofit Challenge Millions of UK buildings constructed before 1990 were built to fire safety standards that are now considered inadequate. With the Building Safety Act 2022 raising the bar, building owners face complex decisions about how to bring older stock up to modern standards without demolition or prohibitive costs. The Scale of the Problem Over 12 million residential buildings in England predate 1990 65% of commercial buildings were constructed before current Approved Document B standards £4.2 billion estimated annual cost of fire damage in older buildings 78% of fire fatalities occur in buildings over 30 years old Key Retrofit Areas 1. Fire Detection and Alarm Systems Older buildings often have outdated or absent fire detection: Upgrade to BS 5839 1 Category L1 — full coverage with intelligent multi sensor detection Wireless systems — ideal for retrofit where cable routing is impractical Aspirating detection (VESDA) — for heritage interiors where discrete detection is essential Integration with building management systems — centralised monitoring and response 2. Compartmentation Remediation Decades of ad hoc service installations often breach original compartmentation: Compartmentation surveys — identifying breaches in fire rated walls and floors Fire stopping — reinstating protection at every service penetration Fire doors — replacing non compliant doors with third party certified alternatives Cavity barriers — installing barriers in previously unprotected voids 3. Means of Escape Improvements Emergency lighting — LED systems with 3 hour standby meeting BS 5266 1 Signage — photoluminescent wayfinding compliant with BS ISO 7010 Protected stairways — upgrading lobbied approaches and adding smoke ventilation Evacuation lifts — where feasible, adding evacuation lifts for mobility impaired occupants Case Study: 1960s Social Housing Block A 15 storey social housing tower in East London required comprehensive fire safety retrofit: Element Before After Detection Zone alarm, partial coverage L1 addressable, full coverage Doors Original timber, unrated FD30S third party certified Compartmentation 47 identified breaches All reinstated and certified Sprinklers None BS 9251 domestic throughout Emergency lighting Maintained, outdated LED with central battery Cost — £2.1M (£35K per flat) Funding and Financial Support Building Safety Fund — for buildings over 18m with cladding issues Cladding Safety Scheme — for 11 18m buildings Social Housing Decarbonisation Fund — can include fire safety works Local authority grants — available in some areas for private landlords Insurance premium reductions — offsetting retrofit costs over time Regulatory Framework The legal obligation to retrofit depends on building type: HRBs (18m+) — Building Safety Act 2022 mandates comprehensive safety case 11 18m residential — Fire Safety (England) Regulations 2022 require enhanced measures All multi occupied — RRO 2005 requires 'suitable and sufficient' fire risk assessment HMOs — LACORS guidance sets minimum standards for Houses in Multiple Occupation Best Practice Retrofit Process 1. Commission Type 4 Fire Risk Assessment — invasive survey of all fire safety elements 2. Prioritise by risk — life safety first, then property protection 3. Develop phased programme — spreading cost and disruption over manageable periods 4. Appoint competent contractors — FIRAS or equivalent third party certified installers 5. Commission and certify — independent verification of all fire safety installations 6. Maintain and review — ongoing maintenance regime with annual FRA review Magnus Opifex SEVEN LTD — UK's Leading Fire Safety & Fire Engineering Consultancy 🌐 magnus opifex.co.uk 📞 +44 7486 691724 ✉️ office@magnus opifex.co.uk Founders: Nicoleta Vasile, Baroness of Brattleby — CEO, Lawyer and Barrister, Legal & Administrative Director Alina — Technical Director & Expert Fire Engineer (BEng) Head Office: Ealing Cross, 85 Uxbridge Road, London W5 5BW Magnus Opifex SEVEN LTD delivers engineering led fire engineering, fire risk assessments, CFD modelling, and building safety consultancy across the United Kingdom and internationally. With over 20 years of combined experience and a UK portfolio spanning healthcare, residential and infrastructure, we bring truly engineered solutions with a personal touch. © 2026 Magnus Opifex SEVEN LTD. All rights reserved.