Install a second window for soundproofing

Hello everyone,

directly in front of my apartment there is a construction site that will last for several more years. Now I am considering how to most effectively keep the noise outside. I had the idea to use the 10-15cm wide windowsill to have a second window installed, so that the sound is doubly prevented from entering.

It would basically be like a box window, where both windows can be opened inward. The function must of course remain so that it is possible to ventilate occasionally.

There are a total of four windows measuring 100x180cm. Since I of course still have to make the whole thing appealing to the landlord, I am also currently looking for offers for reasonable windows. For cost reasons, I would prefer plastic windows. I already found models (e.g. Euro70) with soundproof glass at 340€ each. I suppose the price is hard to undercut, right?

I am absolutely useless when it comes to craftsmanship. So it would have to be done by a craftsman. But I wanted to get your opinion in advance whether there are potential problems with my plan or things I should definitely consider.

It would be nice if you could give me some information on this :-)

Hi,
that will probably not work. With such an arrangement, the inner window openings have to be larger than the outer ones so that they can still be opened.

It is also questionable whether something like that will actually achieve anything in the end. Noise is often transmitted through the masonry or through the [Rollladenkasten]. The trick with the window won't help you there.

Try to find out where the most noise is coming through. If, for example, it is the [Rollladenkasten], it can be insulated. Or replace the panes with soundproof panes, or, or...

Best regards,

Andreas

Hi Andreas,

thanks already for your help!

It is an old building flat - the masonry is accordingly solid. The roller shutter box is outside on the window and not integrated into the masonry. Therefore, I would definitely say that the windows are the weak point here.

Don’t you think that the hinge can be attached on the windowsill about 10 cm away from the other window so that both windows can be opened? I will take a picture now and upload it. Then you can get a better impression.

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

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? Sounds - and looks - like a pipe dream. Better to just have the windows completely replaced with soundproof windows - the landlord would also benefit from that (higher quality apartment, new windows, tax costs...).

Since I naturally still have to make the whole thing appealing to the landlord,

I am also a landlord and I would think you’re crazy with your idea. Costs for temporary windows including installation. Removal after the construction site is finished including costs. No usable windowsill for the next tenant.

Speak to the landlord. Noise can be a defect. There are limits. However, I am skeptical about your construction ideas.