ᐅ Install a second window for sound insulation

Created on: 17 Jan 2022 16:29
M
maniman
M
maniman
17 Jan 2022 16:29
Hello everyone,

Right outside my apartment, there is a construction site that will continue for several more years. Now I’m considering how to most effectively keep the noise outside. I thought about using the 10-15cm (4-6 inches) wide window sill to install a second window, so the sound would be blocked twice.

It would be like a box window, where both windows can open inward. The function must of course remain so I can still ventilate occasionally.

There are a total of four windows, each measuring 100x180cm (39x71 inches). Since I need to convince my landlord, I’m also looking for reasonable window offers. For cost reasons, I would prefer PVC windows. I’ve already found some models (e.g., Euro70) with soundproof glazing for about 340€ each. I suppose that price is hard to beat, right?

I’m absolutely not skilled at DIY, so this would have to be done by a professional. However, I wanted to get your opinion in advance on whether there might be potential issues with my plan or any important things I should consider.

I’d appreciate any information you can share :-)
andimann17 Jan 2022 17:15
Hello,
that probably won’t work. With such a setup, the inner window openings would have to be larger than the outer ones in order to still be able to open them.

It’s also questionable whether this would actually be effective in the end. Sound often travels through the wall structure or the roller shutter box as well. In that case, adjusting the window arrangement won’t help.

Try to find out where most of the noise is coming through. If, for example, it’s the roller shutter box, you can insulate it. Alternatively, you could replace the panes with soundproof glass, or try other solutions...

Best regards,

Andreas
M
maniman
17 Jan 2022 17:50
Hi Andreas,

thank you already for your help!

It’s an older apartment – the masonry is quite solid. The roller shutter box is mounted outside on the window and is not integrated into the masonry. So I would definitely say that the windows are the weak point here.

Don’t you think it would be possible to install the hinge on the windowsill about 10cm (4 inches) away from the other window, so both windows can be opened? I’ll take a picture now and upload it. Then you can get a better idea.
M
maniman
17 Jan 2022 18:03
So, I just took a photo. I would like to place the second window at the front edge of the windowsill.

Interior corner with window above the radiator; white walls and wooden floor.
B
Benutzer200
17 Jan 2022 18:38
maniman schrieb:

So I just took a picture. I would like to place the second window at the front edge of the windowsill.

And how is the rear window supposed to open then? That sounds—and looks like—a pipe dream. It would be better to completely replace the windows with soundproof windows instead—then the landlord benefits as well (higher-quality apartment, new windows, tax advantages, etc.).
maniman schrieb:

Since I still have to make the whole idea appealing to the landlord,

I’m also a landlord, and I would strongly disapprove of your idea. Costs for temporary windows including installation, removal after construction completion including costs, and no usable windowsill for future tenants.
G
guckuck2
17 Jan 2022 19:40
Talk to the landlord. Noise can be considered a defect. There are limit values. However, I am skeptical about your construction ideas.