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Thread: sound proof interior doors

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  1. #1
    DIY Junior Member johnapril's Avatar
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    Default sound proof interior doors

    We are turning an exterior porch into an interior space. One thing we would like is to put French doors in the bedroom opening onto the new space. We would like these doors to block the sound from the rest of the house, however, obviously so that anyone sleeping would not be disturbed. Does anyone know about French doors that block sound? How well do they work? Right now we have 40-year-old sliding glass doors (dual glazed) in that space but every sound travels right through them.

    Thanks in advance.

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    Plumber jimbo's Avatar
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    Double glazed glass panels provide excellent sound isolation, compared to single glazing. Probably do not compare to a solid door. Doors with excellent vinyl weatherstrip on all 4 edges will help.

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    DIY Junior Member johnapril's Avatar
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    Jimbo, where should I look for the best soundproof solid door? What thickness? What material?

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    Moderator & Master Plumber hj's Avatar
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    Default door

    ONe thing you have to consider if you are trying to make the room "soundproof". The heating system requires a means of circulating the air, which is usually the space under the door. If you are sealing the door, then the room has to have its own return air ductwork.

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    Retired Defense Industry Engineer jadnashua's Avatar
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    Just an actual solid door may have some resonances and transmit sounds in certain frequencies. It is important to seal all gaps. If you have ever been to a well-designed music practice room, it is nearly impossible to hear them outside. The doors have a retractable sweep that drops when the door is closed, and while it looks like a solid door, is actually a sandwich of various materials to absorb sound. If you want to go that far, you'll probably have to search out for a specialty supplier.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    Plumber jimbo's Avatar
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    The Masonite molded panel doors are very attractive, inexpensive, and are available in the "Safe and Sound" series solid interior doors. These are very good.

    Sound proof is a relative term. We know you are starting with an exterior wall, so presumably it has some insulation. We don't know if you are planning to have a Hooter's convention in the other room, and expect that sound not to travel.

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