Snagging versus defects: getting the terms right
A snag is usually an item of incomplete or poorly finished work identified before or at handover: a missing grille, a loose cover plate, an unlabelled valve, a scratched fan coil casing. A defect is a failure of work or equipment to meet the contract, whether visible at handover or appearing later, such as a leaking joint, a tripping circuit or a room that never reaches its set point.
The distinction matters because the contract treats them differently. Snags are normally closed before or shortly after the taking-over certificate, sometimes with an agreed list of minor outstanding items. Defects notified during the defects liability period (DLP) must be rectified by the contractor at its own cost within a reasonable time, and retention money is commonly held until the DLP ends and defects are closed.
What to check in an MEP snagging inspection
A useful snagging inspection goes beyond what is visible from the floor. Ceiling access panels should be opened at a sample of locations to check insulation continuity, condensate drain falls, hanger spacing and labelling. Plant rooms and roofs need the most time, because that is where installation quality, access and corrosion protection are tested by the UAE climate.
Functional checks belong in the snag walk too: every light and socket working, every FCU controlled from its own thermostat, every tap and drain flowing, every fire alarm device in its approved position and not obstructed by fit-out. A thermal camera on switchboards under load quickly finds loose terminations that would otherwise surface as failures during the first summer.
- HVAC: thermostat control, diffuser balancing, condensate traps and drain falls, insulation gaps, filter access, noise and vibration
- Plumbing: water pressure at outlets, hot-water temperature, leak checks at joints and mixers, trap seals, tank access and overflow screening
- Electrical: DB labelling and schedules, RCD trips, earthing, cable glanding, thermal scan of terminations
- Fire and life safety: device positions versus approved layout, sprinkler head obstructions, damper access, extinguisher and hose reel signage
- Roof and plant: equipment anchoring, anti-corrosion treatment, sand protection on condenser coils, cable tray covers against UV
How to log defects so they actually get closed
A defect log is only useful if each line is specific and assignable. Every entry should record a unique number, building and room reference, system, a short description of what is wrong rather than what to do, a photo, the responsible trade, the date raised, a target date and the closure evidence. Vague entries such as check AC in flat 1203 create arguments; room 1203 bedroom 2 FCU not cooling, supply air temperature measured above design, gives the technician something to act on.
Shared digital logs, even a well-controlled spreadsheet, work better than paper lists because the consultant, contractor and client facility team see the same status. Closure should require evidence, a photo or a test reading, and verification by the party that raised the item. Grouping recurring defects by type often reveals a root cause, for example one batch of faulty valves or one installer's workmanship.
The defects liability period in practice
The length of the DLP, the notification procedure and the response obligations are set by the contract, so the first step is to read those clauses and agree a practical protocol at handover: who raises defects, by what channel, and what counts as an emergency. Leaks above occupied areas, loss of cooling in peak summer and any life-safety fault should have a defined urgent route.
The contractor's obligation is to rectify defects caused by its workmanship or materials, not damage from misuse or lack of maintenance. This is why the client should have a maintenance regime in place from day one of the DLP: filters changed, water treatment maintained, fire systems serviced. Without maintenance records, warranty and DLP claims become difficult to sustain.
- Agree the reporting channel and an emergency contact at handover
- Keep maintenance records from the first day of occupation
- Run a seasonal check before the first summer peak
- Hold a joint inspection before the DLP expires
- Close all notified defects before retention release
Warranties: manufacturer, contractor and how they interact
Equipment warranties from manufacturers, for chillers, compressors, pumps, VRF systems and water heaters, often start from delivery, start-up or handover depending on the supplier's terms, and they may require authorised servicing to remain valid. Compressor warranties in particular can be longer than the general equipment warranty. The handover file should list every warranty with start date, duration, conditions and the contact for claims.
The contractor's workmanship obligation under the DLP and the manufacturer's equipment warranty overlap but are not the same. A refrigerant leak at a brazed joint made on site is a workmanship issue; a compressor failure with no installation fault is a manufacturer claim. Keeping start-up reports and commissioning data helps settle which applies.
End-of-DLP inspection and how Manolia supports it
Before the DLP expires, a joint inspection should repeat the key handover checks after a full year of operation, including one UAE summer. It is the right time to review BMS trends, check chilled-water delta-T and power consumption, inspect roof equipment for corrosion and sand damage, and confirm that all logged defects are closed with evidence before the final certificate and retention release.
Quality inspection and testing are separate stages in Manolia's eight-stage delivery process, and its QMS structured to ISO 9001 requirements includes corrective action and follow-up procedures, which suit a disciplined defect log. For buildings that move into long-term care, the group also provides annual maintenance contracts, so DLP findings can feed directly into the maintenance plan.
Frequently asked questions
How long is the defects liability period for MEP works in the UAE?
There is no single fixed length; it is set by the contract between employer and contractor, and subcontracts often mirror the main contract. One year from taking-over is common in practice, but some contracts specify longer periods for particular systems. Always check the particular conditions rather than assuming a standard period.
Who pays for defects found during the DLP?
The contractor normally rectifies defects caused by its workmanship or materials at its own cost. Damage caused by misuse, lack of maintenance or third-party alterations is usually excluded. Clear maintenance records and photographic evidence help decide which category a defect falls into and avoid disputes.
What are the most common MEP defects in the first year?
Typical first-year issues include condensate leaks from FCUs and drain pans, rooms not reaching set point due to balancing or controls, loose electrical terminations, noisy pumps or fans, water pressure problems on upper floors, and fire alarm false alarms after fit-out dust. Most are traceable to commissioning shortcuts or later fit-out works.
Do equipment warranties depend on maintenance?
Often yes. Many manufacturers require scheduled servicing, sometimes by authorised technicians, and documented records to honour a warranty claim, particularly for chillers, compressors and VRF systems. Starting an AMC or planned maintenance regime at handover protects warranties as well as equipment life.
Should snagging be done by the consultant or an independent inspector?
The consultant normally carries out the contractual snagging inspection. Owners of villas or individual units sometimes add an independent inspection for their own assurance. Either way, the inspection should use a structured checklist per system and produce a log with photos and responsibilities.