How To Soundproof Existing Windows
Feb 20, 2023Do you have existing windows in the room where you want to build a soundproof home recording studio? If you don't want to remove them entirely this article will show you two ways to create soundproof window inserts.
1) Seal The Window With Particle Board
I learned this method from the Master Handbook of Acoustics by Ken C. Pohlmann and F. Alton Everest. This design involves building a seal either in front of or behind your existing window in the window cavity. The idea is to use four layers of 3/4" particle board sandwiched together. You can see in the diagram below how this works.
You place the particle board in a wood frame and use four carriage bolts to secure the board together. The last board creates a full seal around the window opening and must be airtight for the system to work.
2) Creating A Door In Front or Behind Your Window
The second design is from Home Recording Studio: Build It Like The Pros by Rod Gervais. This design allows you to open or close a massive door in front of or behind your existing window.
This design involves installing a solid core door cut to the size of your window opening. You then attach the door using two to three hinges. You add more mass to this mini door by sandwiching 8psf of sheet lead between the door and 3/4 plywood.
Next, you need to build two gaskets to seal both the solid core door and the 3/4 plywood add on. It is best to add a third final seal. This can be magnetic weather stripping or a door seal kit like this one: Door Seal Kit. This system will allow you to open or close your window door when you are recording or not.
3) Conclusion
If you want to keep your existing windows as is then either of these designs will work to isolate your window for home recording. The downside will be the window will be blocked during times when you need maximum isolation. These means you won't get any natural light.
The benefit of the door method is that you can open your window and allow fresh air into your studio on nice days. This is something even professional studios do not usually have and could be a nice plus to your home studio design.
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