Do skylights let in more noise than windows?

A wall is heavy and upright. A rooflight is a sheet of glass laid into a thin roof, pointed straight at the weather and the flight path.

Sound gets into a room by two routes. It can travel through the material itself, making the glass and frame vibrate, or it can slip through gaps at the edges. A brick wall with a window set into it has a lot of mass around a small pane. A loft room has the opposite arrangement: a light roof build of tile, battens, insulation and plasterboard, with a large pane in the middle of it.

The angle matters as well. A window in a wall sees rain at a slant and often has a sill, a reveal or a neighbouring building in front of it. A rooflight takes the rain square on. Every drop strikes the pane from above, and the sound has only a short drop through the loft space to your ears.

Aircraft work the same way. Around Crawley, where Gatwick sits inside the borough, the noise arrives from above. A roof window is the part of the house most directly exposed to it. Walls are shielded by other walls, trees and fences. The roof has nothing in the way.

The gap is not one single thing. It is four small differences that add up, and you can close each one separately.

The last row is the one we can change. Two rooflights of the same size and price band can sound very different, because the glazing inside each one has a different make-up.

Rain is the easiest place to hear it. Drumming on a thin outer pane carries straight into the loft. The same shower on a thicker outer pane, over a laminated inner one, is a soft hush by comparison. The page on rain noise under skylights goes through that case in detail.

Four choices do nearly all of the work: the inner pane, the outer pane, the seals and the upstand. None of them is exotic.

The inner pane is the big one. Laminated glass is two sheets bonded with a soft interlayer. That layer damps vibration, so the pane does not ring the way a single sheet of toughened glass does. Overhead glass is also a safety matter, and the safety glazing rules sit in Part K of the Building Regulations. Laminated glass answers that concern and helps with sound in the same stroke. The glass is explained in the acoustic laminated glass guide.

The outer pane sets the first note. A thicker outer sheet, paired with a different thickness inside, helps because two panes of different thickness do not vibrate at the same pitch. Matched panes can reinforce each other. Mismatched panes cancel some of that.

The seals and the upstand are where sound gets round the glass. A gap you cannot see will let through what a thick pane has stopped. Gaskets need to be continuous and firm, and the upstand beneath the frame needs to be solid and properly lined, not hollow. A tired seal on an older unit is a common reason a rooflight sounds worse than it did when new.

The right build depends on what the room actually hears, so the first job is to listen. We do that at the survey, in the room where the glass will go.

A loft bedroom on a Gatwick approach has a different problem from a kitchen lantern in a quiet cul-de-sac. The bedroom needs to handle aircraft overhead in the early morning and late evening. The kitchen needs to handle a downpour on hard surfaces, with tiled floors and stone worktops to throw the sound around. A roof window over a stairwell near the M23 has a third problem again, a steady low road noise that comes in at every hour.

We write that down. The quiet spec that comes with every quote names the noise we heard, the glazing build we propose for it, and how the seals and upstand will be finished. You can hold it against any other quote on the same terms. If you want the ingredients laid out first, what goes into a quiet rooflight specification lists them.

Daylight is still the reason for the rooflight. The glazing also has to keep your heat in, and the spec weighs all three together, so a quieter build does not turn into a darker or colder room.

These are the points that come up once the main answer is clear.

Will I hear planes through a new rooflight?

Possibly, depending on the room and the build. Aircraft noise is low and broad, and thin glazing passes it easily. A laminated inner pane with a different thickness from the outer one reduces what comes through. The full discussion is in can you hear planes through a skylight, and the local side is covered under Gatwick flight paths.

Is a roof window quieter than a flat rooflight?

Neither is quieter by nature. A roof window sits on the slope of the tiles, so rain hits it at an angle and partly runs off. A flat rooflight takes it more squarely. What decides the result is the glass make-up and the seals, which is why a roof window installed with a good specification can beat a flat unit with a poor one.

Should I replace an old skylight just for the noise?

If it is also tired, misted or draughty, it is a good moment to. Renewing the unit lets you choose the glazing build and fit fresh seals in one go. If it is sound and only mildly noisy, a spec comparison in the quote will show you whether the change is worth it. Our page on whether acoustic glass is worth it helps you decide.

Does a blind help?

A blind softens light and can take a little edge off a high note, but it does not stop sound coming through the glass. The work is done by the glazing build, not by what hangs below it.

To see what your own room would need, ask for a quote and mention the noise you live with. Everything starts from the skylight and rooflight installation overview.