Sibu · Sarawak · The seam

Where cabinets meet ceiling,clashes get decided.

Cabinet, ceiling and lighting coordination for Sibu and Sarawak. The seam where wall units meet the bulkhead, where downlights compete with trunking, where the cornice fights the cabinet top and where a hidden LED driver still needs to be reached — ELS by ALUMAX resolves these on paper, then coordinates ALUMAX and the M&E trades to one approved set of levels.

Start ELS Pre-CheckSee how ELS worksWhatsApp ELS
Best for

Jobs where more than one trade lands in the same ceiling-to-cabinet zone, and someone has to own the levels before fabrication.

Full-height wall units under a bulkheadKitchens with cooker-hood ductingCove or cornice lighting over cabinetsCassette / concealed A/C near cabinetryTV feature walls with concealed wiringRenovations reusing an existing slab/beam
Quick decision rules

How the seam gets resolved before anyone cuts

Quick rules for the cabinet–ceiling–lighting–M&E overlap.

IfThen
Wall units run full-height to a bulkheadFix the finished ceiling level first, then size the cabinet — never the reverse, or the top filler is uneven.
Downlights and ceiling trunking share one zoneSet out lighting against trunking and ducting on one reflected ceiling plan before either is ordered.
A cornice or shadow gap sits over wall unitsDecide the cornice depth and the cabinet-to-ceiling gap together, so the profile lands clean, not clipped.
An LED strip or driver is concealed in the joinDesign an access route to the driver now — a hidden driver with no access means tearing the ceiling or cabinet later.
A cassette or concealed A/C unit is near cabinetryReserve airflow, drain-pipe falls and a service-access clearance before the cabinet line is finalised.
It's a single cabinet run with no ceiling workCoordination may be unnecessary — ALUMAX can supply and install the product directly.
The clashes we prevent

What collides at the ceiling-to-cabinet line

Each of these is cheap to decide on paper and expensive to discover on site, after the bulkhead is closed.

Cabinet top vs bulkhead levelWall units sized to a guessed ceiling height leave a wedge-shaped filler gap when the real bulkhead is out of level.ELS checks: Finished ceiling level set and signed off before cabinet heights are fixed.
Downlight vs ceiling trunkingDownlights, wiring trunking and duct runs all want the same ceiling void — set out separately, they clash above the board.ELS checks: One reflected ceiling plan reconciling lights, trunking and ducting.
Cornice vs wall unitsA cornice or skirting profile run after cabinets get hung is forced to stop short, notch around, or sit proud of the units.ELS checks: Cornice depth and the cabinet-to-ceiling reveal decided together.
Hood ducting vs cabinet carcassCooker-hood ducting routed after the units are built often has to cut through a cabinet back or drop below the door line.ELS checks: Duct path and rise reserved in the carcass at specification.
Service & access

The parts that have to be reached again

Concealed kit fails eventually. If access wasn't designed into the seam, a small fault becomes a demolition.

LED driver accessStrip drivers buried in a sealed bulkhead or cabinet top have a service life shorter than the cabinetry around them.ELS checks: A reachable driver bay or hatch on the reflected ceiling plan.
A/C drain & service clearanceCassette and concealed units need filter access and a drain fall — a cabinet line run too close traps both.ELS checks: Filter-access and drain-pipe clearance reserved against the cabinet line.
Junction & isolator accessJunction boxes and isolators behind tall units or above bulkheads must stay reachable to meet basic electrical practice.ELS checks: Accessible points kept off the back of fixed cabinetry.
Plumbing behind base unitsStop-valves and connections trapped behind sealed base units turn a routine leak fix into cabinet removal.ELS checks: Removable panels or service gaps over key connections.
What's included

What coordination covers — and what it doesn't

ELS owns the seam and the levels. ALUMAX supplies and installs; the M&E trades execute their own works.

ELS coordinates
  • A reflected ceiling plan reconciling lights, trunking, ducting and bulkheads
  • Finished ceiling and bulkhead levels fixed before cabinet heights
  • Clash-checking cabinet tops, cornices and reveals against the ceiling
  • LED, driver, A/C and junction access routes designed into the seam
  • One approved set of levels and setting-out the trades build to
  • Sequencing so ceiling, M&E and cabinetry land in the right order
Not included here
  • Electrical, lighting or A/C installation work itself (the trades' scope)
  • Cabinet fabrication and installation (ALUMAX supplies and installs)
  • Structural ceiling, slab or beam alterations
  • Supply of light fittings, drivers or A/C equipment
  • Full M&E re-design or load calculations
  • Waterproofing, ducting fabrication or false-ceiling carpentry
What drives the price

What drives the coordination fee

Coordination scales with how many trades and seams have to be reconciled to one plan.

Number of trades at the seamCabinets plus lighting alone is lighter than cabinets, lighting, ducting and A/C all meeting in one ceiling.
Ceiling complexityFlat ceilings coordinate fast; multi-level bulkheads, coves and dropped trays add set-out and clash points.
New build vs renovationReusing an existing slab, beam or out-of-level ceiling needs measurement and reconciliation a new build skips.
Lighting and LED detailCove lighting, concealed drivers and feature walls add access design that simple downlights don't.
Site measurementFrom RM300 in Sibu / RM500 outstation, creditable on confirmation — levels can't be reconciled from a photo.

Indicative only — the final quotation follows site measurement, material selection and approved scope. Prices exclude SST.

How to prepare

Bring these to the coordination session

The more of the ceiling and services we can see up front, the fewer surprises survive to site.

  • Any existing floor plan or layout, even a rough sketch
  • Current ceiling height and where beams or drops sit
  • Where the cooker hood, A/C and main lights need to go
  • Photos of the existing ceiling, walls and any trunking
  • Which cabinet runs are meant to go full-height
  • Any lighting mood or cove/cornice look you want
  • Whether the electrician and A/C installer are already chosen
Where ELS works

Based in Sibu — across Sarawak by appointment.

SibuKuchingBintuluMiriMukahKapit
Cabinet, ceiling & lighting coordination in Sibu

Common questions

What is cabinet, ceiling and lighting coordination?

It's resolving the seam where cabinets, ceiling bulkheads, lighting, electrical trunking and air-conditioning all meet — before fabrication. ELS by ALUMAX fixes the finished ceiling levels, lays out lights against trunking and ducting on one reflected ceiling plan, clash-checks cabinet tops and cornices against the ceiling, and designs access to hidden drivers and services. The trades and ALUMAX then build to one approved set of levels, instead of each guessing and colliding on site.

Why does the ceiling level have to be fixed before the cabinets?

Because full-height wall units are sized to the finished ceiling. If the cabinet height is decided against a guessed or out-of-level ceiling, the top filler ends up wedge-shaped or the cornice can't run clean. Fixing and signing off the bulkhead level first means the cabinet is cut to fit reality, not to a number that changes once the ceiling is actually built.

What are the most common clashes you prevent?

Four recur: cabinet tops against an out-of-level bulkhead; downlights fighting wiring trunking and duct runs for the same ceiling void; cornices that can't run clean over wall units; and cooker-hood ducting forced through a cabinet back because its path wasn't reserved. All four are cheap to settle on a drawing and expensive to fix once the ceiling is closed.

Why does LED driver access need to be planned into the seam?

Strip lighting and its drivers fail well before the cabinetry or ceiling around them does. If a driver is buried in a sealed bulkhead or cabinet top with no hatch, a simple replacement means tearing open the ceiling or the cabinet. Designing a reachable driver bay or access hatch into the reflected ceiling plan up front costs almost nothing; retrofitting access does not.

Do you install the lights, wiring and air-conditioning yourselves?

No. The electrical, lighting and A/C works stay with those trades, and cabinet fabrication and installation stay with ALUMAX. ELS by ALUMAX coordinates the seam between them — the levels, the set-out, the clash-checks and the access — so each trade builds to one approved plan. We own the overlap, not the individual trade scopes.

Is coordination always needed, or can I just order cabinets?

If it's a single cabinet run with no ceiling, lighting or A/C work around it, coordination may be unnecessary — ALUMAX can supply and install the product directly. Coordination earns its place when more than one trade lands in the same ceiling-to-cabinet zone: full-height units under a bulkhead, cove lighting, hood ducting, or cassette A/C near the cabinetry. That's where an owned seam saves the cost of rework.

How does coordination handle a renovation with an old, uneven ceiling?

We measure the existing slab, beams and ceiling on site — levels can't be reconciled from a photo — then set the finished bulkhead level and work everything else to it. Reusing an out-of-level ceiling is exactly where guessed cabinet heights and clashing services cause the worst surprises, so the measurement and reconciliation are part of the fee for renovation jobs.

How much does cabinet, ceiling and lighting coordination cost?

It's delivered from RM1,500 (excl. SST), scaling with how many trades and seams have to be reconciled — a flat ceiling with cabinets and downlights is lighter than multi-level bulkheads with cove lighting, ducting and A/C. Heavier multi-trade jobs run on a project basis. Site measurement is from RM300 in Sibu / RM500 outstation, creditable on confirmation, and the final figure follows that measurement and the approved scope.

References

External references for the standards and climate data cited above. ELS by ALUMAX is not affiliated with these organisations.

Prepared by George Wong — Founder, ELS by ALUMAXFormer senior research engineer, Fortune 500 · Based in Sibu, Sarawak · Last updated: July 2026
Keep planning with ELS

Related ELS services

Every path starts the same way — the free Pre-Check tells you which one your project needs.

Not sure which you need? Start with the free Renovation Pre-Check — two minutes, and your next step is clear.

Start ELS Pre-Check
Resolve the seam before fabrication

Settle the clashes on paper — before the bulkhead is closed.

Start ELS Pre-CheckWhatsApp ELS
Cabinet, Ceiling & Lighting Coordination | ELS by ALUMAX