Start with the storage, not the building
The most expensive warehouse MEP mistakes come from designing for an empty shed. Sprinkler design, smoke venting and even lighting layout depend on what will be stored, how it is packed, how high it is racked and how the aisles run. A building approved for ordinary goods on low shelving may need a significant fire-protection upgrade when a tenant installs high racking with plastics or aerosols. Owners building speculative warehouses in free zones such as JAFZA, DIC/DIP, KIZAD or the Sharjah and Ajman industrial areas should decide early which storage scenario they are designing for and record it in the fire strategy.
The tenant's operation also drives power demand, ventilation of charging areas, office fit-out and the number and type of loading docks, so a short operational brief before design saves later rework.
High-bay sprinklers and fire protection
Fire protection in warehouses typically follows the UAE Fire & Life Safety Code and the NFPA standards it references, with the design density, sprinkler type and need for in-rack sprinklers determined by commodity class and storage height. Options include conventional ceiling sprinklers with in-rack protection or, where geometry and approvals allow, early suppression fast response sprinklers at roof level that can reduce or remove in-rack lines. Each choice has consequences: ESFR systems need large water flows and clear obstruction rules, while in-rack sprinklers need coordination with the racking supplier and protection from forklift damage.
The water supply, fire tank and pump set must be sized for the governing design, and pump rooms need reliable power from both the normal and standby supplies as the code requires. Fire alarm, hose reels or hydrants, and extinguishers complete the system, and in cold stores sprinkler pipework in freezing areas must be dry-pipe or pre-action to avoid ice.
- Storage scenario recorded: commodity, packaging, rack height, aisle width
- Sprinkler concept chosen: ceiling plus in-rack, or ESFR where permitted
- Racking layout frozen before sprinkler shop drawings
- Fire water tank and pumps sized for the governing hydraulic demand
- Dry-pipe or pre-action systems in sub-zero areas
- Rack guards and clear heights checked against final racking installation
Smoke venting and ventilation of large volumes
Large single-volume warehouses fill with smoke quickly, so the fire strategy usually includes roof smoke vents or mechanical smoke extract with smoke curtains to form reservoirs, and an inlet air path through doors or louvres. Smoke vents interact with sprinklers, so the sequencing must follow the approved fire strategy. Day-to-day ventilation is a separate question: an unconditioned warehouse under a metal roof in a UAE summer becomes extremely hot, which affects staff and many goods. Options range from roof ventilators and high-volume fans to evaporative cooling or full air conditioning for temperature-controlled goods.
Battery charging areas for forklifts need dedicated extract to remove hydrogen, and dusty operations need attention to filter access and fan placement.
Loading docks and external services
Docks look simple but concentrate many services: dock levellers and doors need power and controls, dock shelters reduce heat and dust ingress, lighting must work for both inside and outside the trailer, and drainage at depressed docks needs adequate capacity for UAE cloudbursts and sand-laden runoff. In cold stores, docks are where most energy and condensation problems start, so they are often enclosed in a conditioned dock area with fast-acting doors and air curtains. External fire hydrants, tanker access, fuel storage for generators and transformer locations must be agreed with the authority and the utility early, since they affect site layout.
Refrigeration interface in cold stores
In most projects the refrigeration plant is supplied and installed by a specialist refrigeration contractor, while the MEP contractor provides the services around it. That interface must be defined clearly: power supplies and isolators to condensing units and evaporators, condensate drains with heat tracing in freezer rooms, defrost water disposal, BMS or monitoring links for temperature alarms, refrigerant leak detection and ventilation of machine rooms, and fire stopping around refrigerant pipe penetrations. Condensing units on the roof must be selected for high ambient temperatures and protected from dust, and coastal sites need coil coatings against corrosion.
Underfloor heating or ventilation beneath freezer rooms is needed to stop the ground freezing and heaving the slab, and it must be designed with the civil engineer.
- Responsibility matrix between refrigeration specialist and MEP contractor
- Heat-traced condensate drains in sub-zero rooms
- Underfloor heating or ventilation below freezer slabs
- Refrigerant leak detection and machine-room ventilation
- Temperature monitoring and alarms linked to BMS or a remote system
- High-ambient-rated condensing units with corrosion-protected coils near the coast
Insulation, vapour barriers and condensation
Cold stores are built from insulated panels, and the warm side of every joint, penetration and door frame must be vapour-tight. Hot, humid UAE air driven towards the cold side condenses or freezes inside the insulation, causing ice build-up, panel damage and hygiene problems. MEP penetrations are the weak point: every pipe, cable tray and duct passing through the envelope needs a sealed, insulated sleeve detail approved before installation. Doors need heated frames and good seals, and anterooms or air curtains reduce moisture entering with traffic. Lighting fittings must be rated for low temperature and humidity.
Power supply and electrical design
Warehouse electrical demand comes from lighting, forklift charging, docks, conveyors or automated systems, offices and, in cold stores, refrigeration plant that runs continuously. The load estimate must include realistic diversity and planned expansion, because a later increase in utility capacity can be slow and require a new substation. Utility applications to DEWA, SEWA, ADDC/AADC or Etihad WE depend on location, and free zones may have their own procedures. Standby generators are common for cold stores to protect goods during outages, with the refrigeration load prioritised. LED high-bay lighting with occupancy and daylight control is now standard and helps with green building requirements.
Approvals, testing and handover
Warehouses in free zones are typically approved by the zone authority's building department together with Civil Defence, while those in municipal industrial areas go through the municipality. Civil Defence will test sprinklers, pumps, fire alarm and smoke venting as a working system. For cold stores, pull-down testing of the rooms to operating temperature, alarm verification and door heater checks should be completed before stock arrives.
Manolia, established in 2001, has delivered MEP for warehouses including a warehouse in Technopark Dubai and Manolya Warehouses in Dubai, and HVAC works for a cold store in Dubai Investments Park. We apply our 8-stage delivery process with an early storage-scenario review so that fire protection, power and refrigeration interfaces are fixed before procurement.
Frequently asked questions
Do I need in-rack sprinklers in my UAE warehouse?
It depends on the commodity, packaging, storage height and the sprinkler system chosen. Many high-bay installations with conventional ceiling sprinklers need in-rack protection, while ESFR systems can sometimes avoid it if the building geometry, water supply and obstructions allow. The fire consultant determines this under the UAE Fire & Life Safety Code, and Civil Defence approves it, so racking details should be fixed before design.
Can a tenant change the storage use after the warehouse is approved?
Only with care. If the new use involves higher racking, more combustible goods or different packaging, the existing fire protection may no longer be adequate, and a revised fire strategy and Civil Defence approval may be needed. Tenants should check the approved storage scenario before signing a lease or ordering racking.
Why does ice form around cold-room doors and panels?
Because warm, humid air is reaching the cold side through gaps. Common causes are unsealed MEP penetrations, damaged vapour barriers, doors left open, failed door heaters or seals, and missing anterooms or air curtains. Fixing it requires sealing the envelope from the warm side, not just removing the ice.
Who is responsible for the refrigeration system, the MEP contractor or a specialist?
Usually a specialist refrigeration contractor supplies and commissions the plant, while the MEP contractor provides power, drainage, fire stopping, monitoring links and coordination. The split should be written into the contracts as a responsibility matrix, otherwise items such as heat-traced drains, underfloor heating and alarm wiring are easily missed.
How should power capacity be planned for a warehouse?
Start from the operation: lighting, charging, docks, automation, offices and refrigeration, with realistic diversity. Then add a margin for expansion agreed with the owner, because upgrading utility supply later can be slow. The application goes to the relevant utility or free zone authority, and the design should allow space for a future transformer or panel if growth is likely.