#1. Post-Tensioned Slab Detensioning
Every PT slab must be GPR-scanned to locate live tendons before any cutting begins. Detensioning is done by qualified PT specialists who release tension under controlled conditions, typically AED 180–320 per square metre of slab. Skipping this step has caused fatalities globally and is a Dubai Municipality compliance failure.
#2. Top-Down Demolition Sequence
Multi-storey car parks are demolished top-down using long-reach excavators (typically Volvo EC480/750 with 21–28m reach) or floor-by-floor with mini excavators craned to each level. Top-down by long-reach is faster (AED 95–140/sqm) but requires open external access; floor-by-floor is slower (AED 130–185/sqm) but works in tight sites.
#3. Live Operation Adjacent to Other Floors
Phased demolitions where some floors remain operational (e.g., mall parking) require temporary propping, sound and dust separation walls, and continuous structural monitoring. Add 20–35% to base demolition cost.
#4. Ramp & Spiral Demolition
Car park ramps and helical spirals are post-tensioned curved slabs that require specialist GPR mapping and cutting. They are usually demolished last because they provide vehicle access for debris removal during the main works.
#5. RTA & Municipality Coordination
Car parks on RTA roads require an RTA NOC for hoarding and any partial road closure. Mall and tower car parks require building-owner coordination plus Dubai Municipality demolition permit. Trade Licence and contractor pre-qualification are scrutinised for PT work.
#6. Cost Benchmarks 2026
Standalone multi-storey car park (5,000–15,000 sqm BUA): AED 110–165 per sqm. Car parks integrated with malls or towers: AED 165–245/sqm because of phased works and propping. PT detensioning is always additional and itemised separately.
#7. Timeline
Permit and PT survey: 3–4 weeks. PT detensioning: 1–3 weeks. Demolition: 6–12 weeks for a typical 5–10 floor structure. Clearance: 1–2 weeks. Total: 11–21 weeks.