Repair or Replace an Aluminium Window in Singapore?
A decision that looks like a cost comparison, but is really a question about the condition of the frame.
Should I repair or replace an old aluminium window?
Repair while the frame is sound and only the working parts have worn — which describes most Singapore windows, including old ones. Replace when the frame has corroded, distorted or been damaged, when repairs will not hold because the fixings have nothing solid to bite into, or when the window type can no longer be matched to available parts. Age alone is not the deciding factor; the frame is.
| Default answer | Repair — hardware wears out long before frames do |
|---|---|
| Deciding factor | Condition of the frame and its fixing points |
| What changes on replacement | It becomes regulated work needing an approved contractor |
| Full-height windows | Special case — generally not replaceable except with permission for a damaged frame |
| How the decision is made | On site by the contractor, not from photos |
The decision table
| What you are seeing | Points toward | Why |
|---|---|---|
| Handle, latch, roller, stay or hinge worn out; frame sound | Repair | These are consumable parts. Replacing them restores the window fully. |
| Gasket hardened, rattling or minor leakage; frame sound | Repair | Gasket is a serviceable item with a normal replacement cycle. |
| Cracked pane, frame undamaged | Repair | The pane is replaceable within the existing frame. |
| Window is old but works after servicing | Repair | Age is not a fault. A sound frame can outlast several rounds of hardware. |
| Fixings will not hold — screws spin in corroded material | Assess for replacement | Hardware needs something solid to fix into. Repairs will keep coming loose. |
| Frame visibly corroded, pitted or flaking through | Assess for replacement | Structural condition, not a hardware problem. |
| Frame distorted or damaged by impact | Assess for replacement | A distorted frame cannot be aligned back into reliable operation. |
| Same fault returns repeatedly after proper repairs | Assess for replacement | The recurrence is usually the frame, not the parts. |
| Window type has no obtainable matching parts | Assess for replacement | Adapted parts are a stopgap, not a long-term fix. |
| Full-height window, any of the above | Special case | Replacement is generally not allowed; permission may be granted for a damaged frame. |
The part most people leave out of the comparison
Replacing a window is not simply a larger version of repairing one. It changes the regulatory category. HDB states that installation or replacement of new aluminium windows must be carried out by a BCA-approved window contractor listed in HDB's directory, and BCA defines an approved window contractor as a firm registered under workhead RW01. Repair of an existing window sits under the flat owner's or occupant's responsibility to maintain.
So the choice is not only "which costs less" — it is also "which contractor am I now required to use, and have I verified them". The contractor rules guide covers how to check.
How to get a straight answer for your window
Photos will tell us the window type and the likely fault category, and that is enough to route the case correctly. Whether the frame can still hold a repair is a judgement made on site, with hands on the fixings. What we require of the partner is that the recommendation names the specific failed component and the reason it cannot be repaired — not a general statement about age.
Related
- HDB window repair rules — where the maintenance and replacement line falls.
- Window repair prices — what drives the cost of either route.
- Window parts guide — which components are consumable and which are structural.
Frequently asked questions
Should I repair or replace an old aluminium window?
Repair while the frame is sound and only the working parts have worn — that covers most windows, including quite old ones. Replace when the frame itself has corroded, distorted or been damaged, when the same fault keeps returning after proper repairs, or when the window type can no longer be matched to available parts. The frame is the deciding factor, not the age.
Is replacing a window always more expensive than repairing it?
Per job, yes, and by a wide margin. Over time it is not always that simple: repeated repairs to a corroded frame that keeps loosening its fixings can cost more than one replacement and still leave a window you do not trust. The test is whether the frame can hold a repair, not the number of past visits.
Does replacing the window change who can do the work?
Yes, and this is the part people miss. Repairing an existing window is maintenance. HDB states that installation or replacement of new aluminium windows must be carried out by a BCA-approved window contractor listed in HDB's directory. Deciding to replace moves the job into a regulated category.
Can I replace a full-height window in an HDB flat?
Full-height windows are a special case. HDB states that replacement is generally not allowed, except where permission may be granted for a damaged frame. Do not assume it can be done; the case has to be assessed against the current rules first.
How long should an aluminium window last in Singapore?
The frame usually outlasts everything attached to it. What wears out on a normal cycle is the hardware — rollers, friction stays, hinges, gaskets and handles. A window whose frame is sound can reasonably be kept in service through several rounds of hardware replacement, which is why repair is the default answer here.