Aluminium rivets fail. Stainless rivets are the ones BCA is asking about.

Fallen casement windows in Singapore are a rivet problem. The BCA retrofitting order wants SS304 stainless rivets in the friction stays, plus stoppers and angle strips on sliding panels. Penalties for a fallen window run to fines of S$5,000 to S$10,000 and imprisonment of 6 to 12 months. An approved window contractor with RW01 does the replacement. Interior resealing, solar film and an acrylic exhaust panel can be outside that replacement.

A casement window hangs on friction stays. The stay is riveted to the frame and to the sash. Early aluminium rivets corrode in Singapore weather, especially on a west facade and a kitchen window over a stove. When the head fails, the sash can leave the building. That is the fallen-window case BCA’s retrofitting order is aimed at. The compliant rivet is stainless steel, SS304, with a head you can often distinguish from a soft aluminium one once you know the original. Sliding windows are a different mechanism. They need safety stoppers and angle strips so a panel cannot be lifted out of the track by a child or by wind. A missing stopper is not a small plastic extra.

Penalties published for fallen-window offences reach a fine of S$5,000 to S$10,000 and imprisonment of 6 to 12 months, depending on the charge and the harm. The practical duty is to have the stays retrofitted by a BCA-approved window contractor, the RW01 class, and to keep the record. HDB flats need the renovation permit path for that replacement. An interior reseal of the frame, a solar film on intact glass, and an acrylic exhaust panel in a kitchen window are not a sash replacement. They can be done without RW01 if the stay and the rivet are not the work. If the rivet is already suspect, do the rivet first. Film on a failing sash is a decoration on a hazard.

Homey Furnishing will look, photograph and tell you if the head looks like the old aluminium pattern, and will reseal or fit an interior panel when that is the whole job. We will not drill a new rivet and call it RW01. The approved contractor does that, with V On on the HDB permit where one is required. Condos need the MCST as well, because the elevation is common property. Landed houses still fall under BCA if the window is the casement type the order covers. The calendar is not “when it falls”.

Homey Furnishing Pte. Ltd. (ACRA UEN 202018148K), 27 Mandai Estate, #06-10 Innovation Place, Singapore 729931, carries the permit-exempt portion of this work. V On Construction Pte. Ltd. (ACRA UEN 201611708H), listed on the HDB Directory of Renovation Contractors, carries any scope that needs an HDB renovation permit. Those two invoices are not interchangeable. The Building Control retrofitting order for casement windows requires stainless rivets in the stays. Penalties for fallen windows include fines of S$5,000 to S$10,000 and imprisonment of 6 to 12 months. RW01 is the contractor class. HDB permits and MCST approvals still apply.

Spend ten minutes with a torch, your phone camera, and a tape before you buy a product or book a hack. Write down what you see. The safe checks below do not ask you to open a live wire, cut a pressurised pipe, or lean out of a window. From inside, count casement sashes and sliding panels. Photograph each stay’s rivet and each sliding stopper. Note the floor and whether children use the room.

Stop at the red-flag column. Stop if a sash moves when it should hold, if you would need to lean out, or if a quote for rivets does not name an RW01 contractor. The reason DIY fails is almost never a lack of effort. It is that the tool or chemical makes the next professional repair harder, or it hides a leak, a live conductor, or a deposit line until the damage is larger than An inspection visit is S$80 to S$180. Rivet retrofitting is priced by the approved contractor, often several hundred dollars a window..

This is the sequence a careful technician uses so you can tell a shortcut from a finished job. Tools stay in the van. Readings and photos go on the same worksheet as the price. A camera from inside, then the RW01 contractor’s rivet kit and records. Interior seals use a different kit and do not touch the stay.

1. Step 1. Make the area safe and confirm the symptom still matches the photos. For Aluminium rivets fail. Stainless rivets are the ones BCA is asking about., that means Stop if a sash moves when it should hold, if you would need to lean out, or if a quote for rivets does not name an RW01 contractor.
2. Step 2. Measure before touching the finished surface. From inside, count casement sashes and sliding panels. Photograph each stay’s rivet and each sliding stopper. Note the floor and whether children use the room.
3. Step 3. Set protection and lay out the tools that belong to this material. A camera from inside, then the RW01 contractor’s rivet kit and records. Interior seals use a different kit and do not touch the stay.
4. Step 4. Carry out the repair in the order the material allows. aluminium rivets are left in place, a sliding panel has no stopper, or a handyman drill is described as a BCA retrofit is the failure this order is written to avoid.
5. Step 5. Test in place. You leave with photos, a yes or no on the rivet appearance, and either an RW01 booking or a completed interior seal that did not pretend to be one. The record of a real retrofit is the contractor’s, and you keep a copy.
6. Step 6. Clean, label the photographs against the invoice lines, and leave the statutory openings, weep holes, access panels and labels visible.

The order matters because aluminium rivets are left in place, a sliding panel has no stopper, or a handyman drill is described as a BCA retrofit is what happens when a step is rushed. Handover is a measurement, not a handshake. You leave with photos, a yes or no on the rivet appearance, and either an RW01 booking or a completed interior seal that did not pretend to be one. The record of a real retrofit is the contractor’s, and you keep a copy. If the reading or the water test fails, the visit is not closed and a second line is priced before anyone leaves. Permit work, if the diagnosis has moved into hacking, waterproofing, or a new layout, stops here and is repriced through V On Construction Pte. Ltd. UEN 201611708H.

Pay Homey for the look and for interior work. Pay the approved contractor for rivets. Do not accept a single price that blurs the two. Prices below are 2026 Singapore bands for the described scope. They are not a coupon and they are not a guess after an unopened door. A second trade, such as a PUB licensed plumber or an EMA licensed electrician, is named when the law requires it rather than buried inside the labour line. Compare rows by what they include. The planning-life column belongs to that row only.

2026 SGD scope bands

Brand, material and lifespan

Use the permit matrix for the HDB form and the MCST guide if the estate must approve the elevation.

Three worked jobs show how the same symptom is priced differently in a new BTO, an older resale flat, and a private condo or landed house. The totals are the lines a household actually paid, not a national average. Permit-exempt invoices are issued by Homey Furnishing Pte. Ltd. UEN 202018148K.

Case 1: 4-room BTO, low floor

Rivets were already stainless from the builder. A tired gasket was resealed for S$140 by Homey. No RW01 visit. The photos were kept with the defect file.

Case 2: 30-year flat in Queenstown

Powdery aluminium heads on three casements. Homey’s check was S$120. The RW01 contractor replaced the rivets under an HDB permit with V On. A handyman drill was not used. The record went into the resale file.

Case 3: condo study

A sliding panel lifted. The MCST required their contractor for the elevation. Stoppers and an angle strip were fitted. Film the owner had wanted was deferred until the panel could not be lifted. The deposit guide covered the form.

Photograph the stays from inside and book the visual check. Rivets go to an RW01 contractor. Send the photos and the measurements from the ten-minute check. The reply prices the band on this page against what the photos actually show.

• When the HDB permit applies
• Interior window repairs
• Ledges are a different approval