Aluminium window and door cost in Penang by home type

A standard aluminium casement window in Penang costs RM 280-600 per panel installed, a 3-panel sliding door runs RM 1,800-4,000, and a full terrace house re-window package (including all bedrooms, living hall, kitchen, and sliding back door) typically lands between RM 9,000 and RM 22,000. The spread comes down to two things: aluminium grade (Series 55 vs Series 66 vs Series 88) and glass specification.

What aluminium contractors charge for

Aluminium works break into four job types:

1. Window replacement: remove old frames, supply and install new aluminium casement or sliding units
2. Sliding door installation: living hall, balcony, or back-door sliding-panel doors
3. Partition or room divider: aluminium frame + glass partition inside a unit
4. New opening or extension: structural hacking, lintel, then frame supply and installation

Window prices by type

Casement windows (hinged, outward-opening)

Series 55 is the entry-level profile used in most post-2000 terrace houses. Series 66 and 88 use thicker profiles with better weather sealing, which matters more in Penang's northwest monsoon belt (Tanjung Bungah, Batu Ferringhi) than in sheltered condo corridors.

Sliding doors

Bi-fold doors are common in shophouse living halls where space is too tight for a full swing door.

Aluminium partitions (interior)

Office and home-office partitions in George Town shophouses run 25-40% higher when non-rectangular shapes or heritage-style profiles are specified.

Full house packages

Most Penang aluminium contractors price a full terrace house as a single package:

Package pricing saves 10-20% versus ordering window-by-window, and the contractor handles all frame disposal.

What drives variance

1. Aluminium series (profile thickness): Series 55/60 is fine for low-rise sheltered units. Series 88 or above is worth the 30-40% premium for northwest-facing facades, upper-floor units with wind exposure, and coastal-belt properties where rain infiltration is a persistent problem.

2. Glass specification: Clear 4mm is the cheapest option and compliant for most uses. Tinted (green, bronze, blue) adds 20-35% but reduces solar heat gain, which meaningfully cuts aircon load in west-facing rooms. Laminated glass adds another 30-50% but is required for upper-floor windows under Uniform Building By-Laws 1984 for openings above 2m from finished floor level. Double-glazed units (IGU) are rare in residential Penang but available from premium contractors; add 80-120% over single-pane pricing.

3. Frame-to-wall condition: If the existing wall reveal is sound and the old frame dismantles cleanly, replacement is straightforward. Heritage lime-plaster walls (George Town, older Butterworth shophouses) often spall when frames are removed, adding RM 200-600 per opening for re-plastering before the new frame goes in.

How to compare quotes

Three things make aluminium quotes comparable:

• Series number: confirm whether Series 55, 66, or 88 profile is quoted. Contractors sometimes quote Series 55 as standard; ask if Series 66 is available for the same price (often yes if you're ordering a package).
• Glass mm and type: specify whether 4mm clear, 5mm clear, or tinted is included. Request an upgrade price to 6mm laminated for upper-floor windows.
• Nett including installation and frame disposal: some quotes list material only; others bundle labour and waste removal. Get an all-in nett price.

Also confirm that the frame comes with a rubber gasket weather seal and a stainless steel (not mild steel) locking mechanism. Mild steel handles rust and seize within 2-3 years in Penang's salt-air climate.

Browse aluminium works contractors on /aluminium-works-in-george-town or /aluminium-works-in-bayan-lepas.

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Drafted with AI assistance and editorially reviewed by Wei Han. Prices are Penang market estimates based on contractor data as of 2026 and should be used as a planning guide, not a fixed quote.