Sibu · Sarawak · Semi-D & detached

Room to breathe —and room to overheat.

A semi-D or detached house has what a terrace never will: three or four external walls, big openings, a garden, an outdoor kitchen. But the same walls that bring in light bring in the west sun, the outdoor and utility kitchens live fully exposed to weather, and a larger perimeter is more to secure and more to keep dry. ELS by ALUMAX plans the openings and shading, the outdoor wet zones, the security routing and the storage as one coordinated scope — so the house is bright without being an oven, and the outdoor rooms are as built to last as the indoor ones.

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Best for

Where a semi-D or detached specification earns its fee in Sarawak conditions.

Semi-detached, bungalow and detached homesBig west- or afternoon-facing glazingAn outdoor, utility or dirty kitchenCovered patios and outdoor living areasA larger perimeter to secure and keep dry
Quick decision rules

How to decide before you build

On a bigger house, the wins and the mistakes are both outdoors — sun, weather and the perimeter. Decide these before quotation.

IfThen
Large glazing faces the afternoon / west sunShade it and specify the glass and opening before you size the A/C — orient living away from the west heat rather than cooling it all day.
There is an outdoor / utility / dirty kitchenSpecify full or honeycomb aluminium and weather-tolerant hardware. Board carcasses and standard hinges do not survive outdoors in Sarawak.
There is a wet entry, porch or garden doorPlan a drained, hard-wearing threshold — foot-wash, fall and durable floor — so water and dirt stop at the door.
The perimeter is large, with several access pointsRoute CCTV, alarm and access-control conduit on the plan — before plaster. Bolting cameras on afterwards means surface trunking everywhere.
You want large wardrobes or a dressing roomPlan ventilated internals, not a sealed damp box — humidity and mould collect fastest in a big, closed wardrobe.
There is a covered patio or outdoor living areaTreat it as a real room — shade, drainage, weatherproof finishes and power / lighting routed early — not a leftover slab.
Openings, sun & outdoor rooms

The outside is half the house.

A detached house lives outward — big openings, a garden, an outdoor kitchen. Each of those is a chance and a weather exposure at once.

West sun & big glazingThe openings that make the house bright also load it with afternoon heat through unshaded west and rear glass.ELS checks: Shading, orientation and glass specified before the cooling load is sized.
Outdoor / utility kitchenThe dirty kitchen takes the heavy wok cooking and the weather — the harshest place in the house for a cabinet.ELS checks: Full or honeycomb aluminium and weather hardware, supplied and installed by ALUMAX.
Covered patio / outdoor livingA covered outdoor area only becomes a room people use if it is shaded, drained and finished for weather.ELS checks: Drainage, shade, weatherproof finishes and power routed as a real room.
Wet entry & garden transitionsDoors to the garden, porch and outdoor kitchen track in water and dirt unless the threshold is planned to stop them.ELS checks: A drained, hard-wearing threshold detailed so the mess stops at the door.
Security, storage & wet zones

More house, more to hold together.

A bigger house means a bigger perimeter to secure, more to store, and more wet zones inside. Routing and materials decided early keep it all coordinated.

Perimeter securityCCTV, alarm and access-control need conduit, power and camera positions decided before the walls close.ELS checks: Cabling routes and device positions coordinated on the plan — equipment by a specialist.
Large wardrobes & dressingA big, sealed wardrobe traps humidity against clothes and grows mould — the bigger the box, the worse it gets.ELS checks: Ventilated internals and moisture-tolerant fit-out specified to the climate.
Whole-house storage & utilityLaundry, store and pantry are usually left as whatever is spare — so they never quite work.ELS checks: Utility spaces planned deliberately, not as leftover floor.
Wet zones insideBathrooms and the indoor wet kitchen carry the same swelling risk as any Sarawak wet zone.ELS checks: ACP or honeycomb aluminium bases where water stays, board where it is dry.
What's included

What the semi-D specification covers

ELS specifies, coordinates and QCs the whole property, indoors and out. ALUMAX supplies and installs the cabinetry. Some scope is ALUMAX-direct; some is multi-trade on a project basis.

Included in the specification
  • Whole-property layout across every external wall
  • Sun, shading and opening strategy for west / afternoon exposure
  • Outdoor / utility kitchen material, hardware and services
  • Covered outdoor area treatment — drainage, shade, power
  • Security cabling routes and device positions (CCTV / alarm / access)
  • Ventilated wardrobe and dressing-room fit-out
  • Moisture-zone material schedule and QC hold-points
Not included (coordinated separately)
  • Structural, roof and facade works — project basis, licensed
  • Waterproofing / tanking works — project basis, multi-trade
  • CCTV / alarm equipment supply and licensing — specialist
  • Landscaping and external civil works — project basis
  • Plumbing and electrical works — licensed trades
  • Final renovation price — confirmed after measurement and quotation
What drives the price

What drives a semi-D quote

The specification fee starts from RM1,500 (excl. SST). The build cost that follows depends on these.

Amount of glazing and shadingHow much west / afternoon glass there is, and whether it needs external shading or a glass upgrade.
Extent of outdoor / aluminium workThe outdoor and utility kitchens and any exposed cabinetry must be full or honeycomb aluminium.
Covered-area finishing levelWhether the patio is a basic covered slab or a fully finished outdoor room.
Security scopeNumber of camera and access points and how far the cabling has to run.
ALUMAX package levelEssential, Signature or Bespoke — product pricing confirmed by ALUMAX after measurement.
Site condition & accessSibu site measurement from RM300, outstation from RM500 — creditable on confirmation.

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

How to prepare

How to prepare for the Pre-Check

A few things that make the specification faster and the quote more accurate.

  • A site plan or photos of every elevation — note which faces west
  • Where the afternoon sun hits, and which rooms overheat
  • How you use the outdoor kitchen — heavy wok, BBQ, wash-up
  • Your security concerns and the main access points
  • Your wardrobe, dressing and storage wishlist
  • What you want from the covered outdoor area
  • What stays and what is new
Where ELS works

Based in Sibu — across Sarawak by appointment.

SibuKuchingBintuluMiriMukahKapit
Semi-D & detached renovation in Sarawak

Common questions

My semi-D gets brutally hot in the afternoon — what can be done?

The heat is almost always the west and afternoon sun loading unshaded glazing and walls. Before adding more air-conditioning, the fix is to cut the heat that gets in: external shading over west and rear openings, the right glass specification, and — where the layout allows — orienting living spaces away from the worst exposure and letting a cross-breeze carry heat out. Shade and ventilation reduce the load first, so the A/C you then size is smaller and cheaper to run. ELS plans this before finishes, not after you have already fought it for a season.

What material should an outdoor or dirty kitchen be?

Full aluminium or honeycomb aluminium, with weather-tolerant hardware — supplied and installed by ALUMAX. An outdoor or utility kitchen takes the heaviest wok cooking and is exposed to rain, sun and humidity, which is the harshest environment in the whole house for a cabinet. Board carcasses swell and standard hinges corrode outdoors within a year or two. Aluminium does not swell when it stays wet, and the hardware is chosen to survive the exposure. It is the one place where paying for the right material is not optional.

How do you plan security into a renovation?

By deciding camera and access positions and routing their cabling on the plan, before plaster goes up. On a larger, detached property the perimeter is longer and there are usually several access points, so CCTV, alarm and access-control wiring — and the power for them — should be concealed in conduit that is run with the electrical first fix. Bolt the cameras on afterwards and you are left with surface trunking around the house. ELS coordinates the routes and device positions; the equipment itself is supplied and licensed by a security specialist, which we scope separately.

Can a covered patio become a proper living area?

Yes, if it is treated as a real room from the start rather than a leftover slab. That means planning shade against the sun and driven rain, drainage so the floor never holds water, weatherproof finishes and cabinetry, and power and lighting routed to it early. Done that way, a covered outdoor area becomes the room a Sarawak family actually lives in — for cooking, eating and gathering in the cooler part of the day. Done as an afterthought, it stays a hot, wet slab nobody uses. The difference is decided in the plan.

How do you stop big wardrobes going damp and mouldy?

By ventilating the internals instead of sealing them. A large walk-in wardrobe or dressing room is a big, still, closed volume — exactly where Sarawak humidity condenses and mould takes hold, especially against an external or bathroom-adjacent wall. The fit-out is specified for airflow: ventilated backs and bases, gaps that let air move, moisture-tolerant materials, and hardware chosen for humidity. Where needed we coordinate active measures too. The aim is a wardrobe that breathes, so your clothes are not sitting in a damp box.

How much does a semi-D or detached renovation specification cost?

The Design + Specification service starts from RM1,500 (excl. SST), depending on scope — a detached house with outdoor kitchens, covered areas and a security scope sits at the higher end. Site measurement is from RM300 in Sibu and RM500 outstation, creditable on confirmation. The fee covers the layout, the sun and material specification and the coordination; the final build cost is confirmed after measurement, material selection and an approved scope. Prices exclude SST.

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
How ELS coordinates it

The weeks ELS saves — by ordering, not waiting.

Freeze the drawings, order every long-lead item the same day, and the 8-week factory lead runs concurrent with demolition and wet works instead of after them.

Semi-D / detached · ~14–15 weeks10 QC hold-points+ external envelope

The binding constraint here: The external envelope — roof, facade, boundary and drainage — added to the prep phase.

  • Adds roof, external door/window casings, rainwater goods, boundary and drainage into Phase 2.
  • Lintel checks for the larger openings; west-sun shading decided in the design freeze.
  • Often 3-phase M&E; the outdoor / utility kitchen orders full aluminium at W0.
See the full coordination blueprint

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Related ELS services

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Semi-D & Detached Renovation Sarawak | ELS