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ntrainer

04:31AM | 04/02/04
Member Since: 12/15/02
33 lifetime posts
Bvwindows
We have a baby on the way and the location of the baby's room is much too close to the living room of our home... which means that if we have a light-sleeping baby, we will have a problem with sound (primarily talking and even low-volume television) making its way into the baby's room.

We figure that step #1 in solving this problem is to replace our "vintage" 1959 hollow-core doors with something that provides good sound insulation; much of the sound seems to seep into the baby's room through the hollow-core door. So I have a few questions:

a) Who makes the best quality solid-core or solid-wood door for purposes of sound deadening? Note that I probably don't need to replace the framing, but just the door. And note that this is for RESIDENTIAL applications, so I'm looking for something attractive for that purpose (i.e. a craftsman-style 3- or 5-panel door, or even a traditional 6-panel colonial-style door).

b) In order to improve the sound-deadening qualities of the door even more, do I need to build a threshhold under the door? Right now the hardwood floors simply flow into the bedroom from the hallway with no threshhold, so sound can travel underneath the door. I assume this is an important sound-deadening step, but having never replaced doors before I just don't know?

c) Do I have to buy solid wood doors in order to get maximum sound control... or is there such a thing as a solid-core door built from other materials (that might be better for sound insulation and/or less expensive)?

d) Any other suggestions would be helpful. Thanks!

homedoc

11:40AM | 04/04/04
Member Since: 05/21/01
71 lifetime posts
MDF doors do a pretty good job at blocking more sound than hollow core. Your mission should you choose to accept it should really be how can I have less sound in the living room. A local architect is probably your best bet. There are an incredible amount of variables that can add great expense to a project like this. Some inexpensive quick solutions for sound absorption are thick carpeting, furniture and added insulation in the interior walls. Good luck. I would add a second wall in front of the first wall. Space them so they do not touch each other. This would be the best method of preventing sound transmission. Otherwise, blown in insulation will help, and the heavier it is the better. Cellulose might be the low cost best choice. With a home built in 1959 however the walls should not be the issue.


homebild

05:44PM | 04/05/04
Member Since: 01/28/03
693 lifetime posts
The fact is, that solid doors conduct more sound than do hollow doors.

I cannot agree with homedoc any less.

That is the problem with designing 'soundproof' walls.

It is not the open, hollow, spaces between the studs that conducts the sounds, it is the solid studs themselves.

MDF will only make a bad situation even worse.

homedoc

05:45AM | 04/06/04
Member Since: 05/21/01
71 lifetime posts
Homebild, your original post to this duplicate one almost said the same thing except for the door. So you agree with everything except for the door. I agree a truely hollow door without connections from front to back would conduct less sound. In reality a hollow core door is connected from the front to the back along not just its edges but though a series of wood pieces that run throughout the door to give it rigidity. These are glued from one veneer to the other creating a solid point to point transfer for sound along a solid surface. If you have never cut a hollow core door in half try it. An MDF door is much heavier and will not vibrate as much from light noise as a hollow door would and therefore conduct less noise. I am talking ambiant noise from a TV or soft conversations. Loud noises will pass through either door quite easily. Whichever door door you choose make sure you pick one that architecturally matches the rest of the doors in your house so you don't have an odd ball when you go to sell.
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