Sibu · Sarawak · QC layer

The renovation QC checklistwe run before you sign off

Most defects in Sarawak homes are not bad workmanship — they are checks nobody ran at the right stage. This is the staged QC checklist ELS uses: what we verify before production, during install, on wet-area and M&E points, and at handover. Use it to hold any contractor accountable, or let ELS run it as your coordination and QC layer behind ALUMAX.

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Who this checklist is for

Homeowners about to approve production drawingsAnyone managing a renovation across multiple tradesBuyers comparing contractor quotes who want a QC standardWet-kitchen, bathroom and flood-prone home projects

Quick decision rules

How to use this checklist

QC is about catching problems at the cheapest stage to fix them — on paper, not after install.

If	Then
A check belongs to an earlier stage but was skipped	Stop and resolve it now — a fix on paper costs a fraction of a fix after fabrication
A cabinet sits in a wet zone (wet-kitchen base, vanity, laundry)	Confirm the carcass is ACP or honeycomb aluminium — not just 'moisture-resistant' board
A board is labelled E0 / E1 / ENF	Treat that as emission grade only — it says nothing about waterproofing
A check fails during install	Log it with a photo and stop that trade before they build over it
You are running this yourself without a coordinator	Insist on one approved scope all trades sign to — undocumented changes are where disputes start

Stage 1

Before production / drawing approval

The cheapest stage to fix anything. Every check here is a line on paper, not a saw cut.

Dimensions match the site, not the floor planDeveloper plans are routinely off by centimetres; an unverified drawing produces a cabinet that won't fit.

Material specified per moisture zoneDry runs can use moisture-resistant board; wet zones need ACP or honeycomb aluminium. This must be fixed on the drawing.

Appliance and sink models confirmed before drawingHob cut-outs, oven housings and sink reveals are model-specific; a late swap means a rebuilt carcass.

Socket, switch and water-point positions overlaidM&E points must be plotted against the cabinet drawing so nothing lands behind a fixed panel.

Door swing, drawer clash and walkway clearance checkedTwo drawers or a door and an appliance that collide are obvious on paper and expensive after install.

One approved scope all trades sign toA single locked scope is what lets you hold tiler, electrician and cabinet maker to the same plan.

Stage 2

During production & install

Catch it while the trade is still on site — not after the next trade builds over the problem.

Carcass material matches the approved specVerify the board or aluminium delivered is the grade specified — substitutions happen quietly.

Edge banding sealed on all cut edgesIn Sarawak humidity, an unsealed edge is the first place a board swells and delaminates.

Carcass level, plumb and securely anchoredOut-of-level runs throw off doors, worktops and the whole alignment downstream.

Hinges, runners and hardware are the agreed brandHardware is the first thing to fail; a cheaper substitute won't survive daily use in a humid kitchen.

Wall fixings suit the actual wall typeHollow block, brick and partition walls each need the right anchor or a loaded wall cabinet pulls out.

Stage 3

Wet-area & M&E checks

Where Sarawak homes fail soonest: moisture, water connections and electrical points.

Wet-zone carcasses are ACP or honeycomb aluminiumMoisture-resistant board is not waterproof; under a wet-kitchen sink it will eventually fail.

Plumbing connections pressure-tested before boxing inA slow leak behind a panel is invisible until the carcass below is already rotting.

Sealant lines continuous at sink, hob and backsplashGaps in sealant are the direct path for water into the carcass and adjacent walls.

Wet-area floor falls toward the drainStanding water from a flat or reverse fall is a daily moisture load on every cabinet base.

Electrical points earthed and clear of water zonesSockets near a sink without correct earthing and spacing are a safety and code problem.

Flood-prone homes have a raised or sacrificial base detailIn flood zones the base detail decides whether one flood ruins the whole run.

Stage 4

Snagging & handover

The final walk where you confirm everything works, aligns and is documented before you pay the balance.

Every door and drawer aligned and soft-closingUneven gaps and slamming doors signal hardware that wasn't adjusted at handover.

Surfaces free of scratches, dents and glue marksCosmetic defects are far harder to claim once the balance is paid and trades have left.

All appliances and water points tested liveA hob, tap or extractor should be run on site, not assumed to work.

Silicone, caulk and trims cleanly finishedMessy sealing is both a look problem and the most common spot for early water ingress.

Defects logged with photos and a fix dateA written snag list with dates is your leverage; verbal promises rarely get honoured.

Warranty, care notes and material list handed overYou should leave knowing what was installed and how to maintain it in this climate.

What's included

What QC covers — and what it doesn't

A QC walk verifies that approved work was built correctly. It is not a redesign and it cannot fix decisions that were never specified.

A QC walk includes

Verifying built work against the approved scope and drawings
Checking material grade by moisture zone
Wet-area, sealant and M&E point inspection
A documented snag list with photos

A QC walk does not

Redesign work that was never specified or approved
Make 'moisture-resistant' board waterproof after the fact
Cover structural, façade, drainage or waterproofing trades unless scoped as a project
Replace a written contract or warranty with the contractor

What drives the price

What a QC engagement depends on

ELS runs QC as part of a coordination engagement. These are the factors that shape it.

Number of stages walkedA single handover walk differs from staged QC across drawing, install and wet-area stages.

Trade count and coordination loadMore trades to one scope means more interfaces to verify and align.

Site locationSite measurement is from RM300 in Sibu and from RM500 outstation, creditable on confirmation.

Wet-area and flood-risk complexityFlood-prone and heavy wet-zone homes need more inspection points and detailing.

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

How to prepare

What to have ready for a QC walk

The walk goes faster and catches more when these are on hand.

The approved production drawings and final scope
The material and hardware specification list
Confirmed appliance and sink models
M&E layout showing socket, switch and water points
Any quote or contract terms covering defects and warranty
A phone or camera to photo-log every snag
Notes on which areas are wet zones or flood-prone

Where ELS works

Based in Sibu — across Sarawak by appointment.

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Renovation QC in Sarawak

Common questions

What is a renovation QC checklist actually for?

It's a staged set of checks that confirm work is specified and built correctly at each point — before production, during install, on wet-area and M&E details, and at handover. The aim is to catch problems at the stage where they're cheapest to fix, ideally on paper before anything is cut or fabricated.

Can I run this checklist myself?

Yes — it's written so a homeowner can hold a contractor accountable stage by stage. The hard part is having one approved scope that every trade signs to, and knowing the material logic, especially that 'moisture-resistant' board is not waterproof in a wet zone. Where coordination across trades gets heavy, that's the layer ELS runs.

Why does material choice keep coming up in QC?

Because the most common Sarawak defect is the right-looking cabinet built in the wrong material for its moisture zone. We choose by moisture zone, not budget: dry runs can use moisture-resistant board — a substrate rating, which is a separate axis from the E0/E1/ENF emission grade and is still not waterproofing — while wet-kitchen bases, vanities and laundry zones need ACP or honeycomb aluminium.

When in the project should QC start?

Before production. The drawing-approval stage is where a fix costs a fraction of what it costs after fabrication or install. Starting QC only at handover means you're inspecting decisions that were locked in weeks earlier, when changing them is expensive or impossible.

How is ELS different from an interior designer running site visits?

ELS is the risk-control, specification, coordination and QC layer behind ALUMAX — not a generic design firm. ALUMAX supplies and installs the products; ELS plans scope, specifies materials, lighting and M&E, coordinates trades to one approved scope, and runs QC before work starts. The checklist is the operational side of that role.

What does a wet-area check focus on?

Carcass material (ACP or honeycomb aluminium, not moisture-resistant board), pressure-tested plumbing before anything is boxed in, continuous sealant at sink, hob and backsplash, floor falls toward the drain, and earthed electrical points clear of water. In flood-prone homes we also check the base detail so one flood doesn't ruin the whole run.

What should I bring to the QC walk?

The approved drawings and final scope, the material and hardware spec list, confirmed appliance and sink models, the M&E layout, any contract terms on defects and warranty, and a camera to photo-log every snag. Note which areas are wet zones or flood-prone so those get the right level of scrutiny.

Does QC replace a warranty or contract?

No. QC verifies that approved work was built correctly and produces a documented snag list — that's leverage, not a legal substitute. You still want a written contract and warranty with whoever supplies and installs. The QC record makes those documents far easier to enforce.

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

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