Soundproof Windows
Laminated, Double Glazing & Secondary Windows (2026)

Name the noise first

Before spending on glass, stand in the room with the window shut and then open. If most of the noise disappears when the window is closed and sealed, the window is your problem and a better window will help. If the noise is almost as loud with the window shut, it is coming through gaps, the wall, the aircon opening or the floor, and new glass will disappoint. Our soundproofing guide makes the same point: name the noise before you touch anything.

Traffic, an elevated rail line, a flyover or a busy junction is airborne noise, much of it low-frequency rumble from engines and tyres. Low frequencies are the hardest to stop, which is why mass, airtightness and a wide air gap matter more than any single product.

Why ordinary windows leak sound

The default Klang Valley window is a single-glazed aluminium slider. It runs on a track with brush seals, and a brush seal cannot compress, so there is an air path around the moving sash by design. Where air goes, sound goes. A casement that closes onto a compression gasket seals in a way a slider mechanically cannot.

Old louvre (nako) windows are worse still. Our louvre window guide notes that the gaps between the blades let cooled air out and traffic noise in by the same route.

The options compared

Step one: make the window you have seal

The cheapest improvement is often the biggest. Replace perished gaskets and weatherstripping, adjust the sash so it closes tight, and re-seal the gap between the frame and the wall, which is often open and is also a common cause of damp walls. Our window repair guide prices a full perimeter re-seal and gasket resealing per window.

Check the other holes in the same wall too: the aircon pipe sleeve, an old exhaust opening, or a gap under the frame. Sound finds the weakest path, and an unsealed pipe hole next to a new window undoes the work.

Laminated glass

Laminated glass is two sheets bonded with a plastic interlayer (PVB). The interlayer damps vibration in a way a single monolithic pane does not; our doors and windows guide puts it simply: the PVB interlayer damps mid-frequency noise well, at a premium of roughly +30–50% on glass cost. It is also a safety glass: if it breaks, the pieces stay stuck to the interlayer.

Laminated glass works best in a frame that seals. Putting it into a leaky slider improves the glass but leaves the air gaps around the sash, which is why it is usually combined with new gaskets or a casement frame.

Double glazing: heat or noise?

A sealed double-glazed unit (two panes with an air or gas gap) is sold mainly for heat. For noise, ask the supplier a direct question: is this unit specified for heat or for noise? Our soundproofing guide explains that two panes of identical thickness with a narrow gap tend to resonate together, while an asymmetric pair with a wider cavity is the arrangement that favours noise. A laminated pane on one side of the unit helps further.

Double glazing is still not common in Malaysian homes, so the frame has to be designed to take the thicker unit. That usually means new frames rather than new glass in old aluminium sections.

Secondary glazing: the second window

Secondary glazing is an entirely separate inner window, fitted inside the existing one with a generous air gap between them. The wide gap, two independent frames and fresh seals make it one of the most effective ways to cut traffic noise, and it leaves the outer window and the building’s facade untouched.

It is under-used in Malaysia and often the best answer for a condo or a rented unit, for the reason in the next section. The trade-offs are practical: it takes up the depth of the window reveal, you open two windows for fresh air, and the inner frame has to be neat enough to live with.

Condos: the facade is not yours alone

In most strata buildings the external window is part of the common property, or is at least controlled by the by-laws, so replacing it, or changing its colour or style, is not yours to decide alone. Check with management before ordering anything. Secondary glazing on the inside, re-sealing and a gasket upgrade normally avoid the facade question entirely; our strata common property guide explains where the boundary usually falls.

What quieter windows cost

These are indicative Klang Valley ranges for 2026 from the ClickBina guides named in the sources section. Secondary glazing and acoustic double-glazed units are quoted on the window sizes and the system chosen.

A realistic noise job often combines two or three of these: re-seal everything, upgrade the worst window to a gasketed casement with laminated glass, and add secondary glazing in the bedroom that faces the road.

How ClickBina can help

WhatsApp us your job details for a quote: which rooms face the noise, the window type and sizes, whether it is a landed house or a condo, and what the noise is (road, rail, school, construction). We reply within the hour. Where the windows are part of a wider refurbishment, we handle whole-house refurbishment and coordinate the trades, including the window specialist and the making good around new frames. A site visit is RM150, waived if you go ahead, and the price we agree is a flat price with no hidden charges.

Sources & methodology

• ClickBina soundproofing guide — window order of work, sliders versus casements, double glazing for noise, secondary glazing, strata facades.
• ClickBina sliding door cost guide — double-glazed unit upgrade per panel.
• ClickBina doors and windows guide — laminated glass damping and premium.
• ClickBina window repair and louvre window guides — re-seal, gasket and replacement window prices.
• ClickBina glass types guide — laminated glass supply price.

How we estimated prices: every RM figure on this page is quoted unchanged from the ClickBina guides named above. They are typical Klang Valley market ranges for 2026, not fixed rates.