Acoustic door seals, rockwool partitions and secondary windows
Room soundproofing in Singapore starts at S$280 to S$550 for an acoustic door drop seal and runs to S$2,800 for an interior secondary window. A solid-core door upgrade is S$680 to S$1,150. Rockwool partition infill is S$850 to S$1,950. Secondary glazing stays inside the room, so it does not wait on a BCA RW01 facade permit.
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Where the noise is getting in
Most bedroom noise is the door gap and the window, not the painted wall. Seal the gap you can see before you open a partition.
| What you see | Likely cause | What to do first / typical cost |
|---|---|---|
| Light shows under the bedroom door | The leaf has no drop seal | Perimeter and automatic drop seal: S$280 to S$550 |
| Expressway or MRT noise through the glass | Single glazing and a frame gap | Interior secondary window: S$750 to S$2,800 |
| Voices through a drywall | Empty stud cavity | Rockwool and a double gypsum skin: S$850 to S$1,950 |
| Piano or call noise in the room itself | Hard walls reflecting sound | Slatted wood or PET felt panels: S$580 to S$1,600 |
2026 soundproofing price bands
This page is acoustic hardware and interior glazing. It is not a fabric curtain or indoor roller-blind supply page.
| Job | 2026 SGD band | Inclusions |
|---|---|---|
| Acoustic door perimeter and automatic drop seal | S$280 to S$550 | Surface-mounted kit for a hollow-core or solid timber door, aimed at 32 to 38 dB leakage reduction. Fire-door edges are not planed. |
| Solid-core timber door, seals and heavy-duty hinges | S$680 to S$1,150 | Solid-core leaf, acoustic perimeter seals and hinges sized for the extra weight. |
| Drywall opening, rockwool infill and double gypsum reseal | S$850 to S$1,950 | Open the partition, 60 to 80 kg/m3 rockwool, and a double gypsum skin put back. |
| Slatted wood or high-density PET felt acoustic panels | S$580 to S$1,600 | Decorative acoustic wall panels for a study, piano corner or baby room. |
| Interior secondary magnetic or sliding acoustic window | S$750 to S$2,800 | Acrylic-laminated secondary glazing inside the room for PIE, CTE, AYE or MRT noise. No exterior facade change. |
MRT noise and a west window are not the same product
A secondary window is S$750 to S$2,800 and a door seal is S$280 to S$550 when those match. Film for west sun is a different quote. We do not publish a decibel result.
Acoustic door seals, rockwool partitions and secondary windows: access and preparation
Acoustic door seals, rockwool partitions and secondary windows is hardware and carcass work when the kitchen or wardrobe layout stays put. Hinges, runners, a door leaf in the same opening, and a sectional under-sink rebuild do not need an HDB renovation permit. A new layout, a hacked wall, or a moved gas point does.
Brand-matched hardware takes longer to identify than a generic cup hinge. A soft carcass under a leak is a different visit from a dry door that only needs alignment. Condo management may care about noise and disposal of the old board. Landed houses add stair cupboards and taller doors.
- Photo of the hinge or runner stamp
- Count the doors or drawers that fail
- Note a leak under the sink if the board is soft
- Clear the work area
- Say HDB, condo or landed
Plan Acoustic door seals, rockwool partitions and secondary windows
Read the stamp before ordering a look-alike hinge or runner.
Protect the floor and empty the cabinet that has to come open.
Replace the failed part. Do not rebuild the kitchen because two doors sag.
Check that doors close, drawers stay on the runner, and overhead flaps stay up.
- Acoustic door perimeter and automatic drop sealS$280 to S$550
- Solid-core timber door, seals and heavy-duty hingesS$680 to S$1,150
- Drywall opening, rockwool infill and double gypsum resealS$850 to S$1,950
- Slatted wood or high-density PET felt acoustic panelsS$580 to S$1,600
| Access | HDB | Condo | Landed |
|---|---|---|---|
| Permit | Layout unchanged: no HDB permit. A new kitchen layout is V On Construction. | MCST quiet hours and a lift for sheet material. | No HDB permit. A structural opening is still not carpentry. |
| Board | HDB kitchens are often 16mm particleboard with a melamine face. | The same moisture problem, plus a management rule on debris. | Older landed joinery may be solid timber. Match the repair to the timber, not to a flat-pack hinge. |
| Hardware | Count hinges and photograph the angle before anyone buys a set. | Service lifts close early. Book the slot before the parts arrive. | Tall doors need a second person. Do not hang them alone. |
- Photo of the hinge or runner stamp
- Count the doors or drawers that fail
- Note a leak under the sink if the board is soft
- Clear the work area
- Say HDB, condo or landed
Frequently Asked Questions
Do I need BCA approval for a secondary acoustic window?
Not when the second window sits inside the room and the exterior frame is untouched. The band is S$750 to S$2,800. Exterior rivets and glass remain RW01 work.
Can you add a drop seal to a fire-rated main door?
Yes, surface-mounted only, at S$280 to S$550 for a perimeter and automatic bottom seal. SCDF Clause 11.8 does not allow the fire-door edge to be planed.