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Author Topic: Replaced Door but No Improvement?  (Read 2601 times)

Vermithor

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Replaced Door but No Improvement?
« on: July 17, 2016, 02:01:23 PM »

So I've been trying to soundproof my bedroom. I previously had a Masonite Safe N' Sound door (rated at 27 STC) with an automatic bottom door seal and weatherstripping around the stop.

It was definitely an improvement over the hollow-core that was there before but I wanted more so I got a solid-core wood door to replace it with. This door is a bit thicker than the last one and substantially heavier. From 1-3/8" to 1x3/4" and around 42lbs to around 78lbs. I replaced the weatherstripping and the door seal.

What's strange is that there doesn't seem to be a significant change in it's sound reduction. If anything it seems worse than before!

I don't understand this since I've always heard that mass is king when it comes to sound reduction and this door is almost twice as heavy and thicker as well.

What do you think might be going on?

Randy S

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Re: Replaced Door but No Improvement?
« Reply #1 on: July 18, 2016, 04:46:29 PM »

do a light test and see if you can see any leaks in the system.

you also could have a gap between the rough frame and the door casing, normally hidden by molding.

If you have no leaks then your door could simply not be heavy enough, normally good sound blocking door can range minimum 100lbs. to 200lbs.

Randy S.

Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

Vermithor

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Re: Replaced Door but No Improvement?
« Reply #2 on: July 19, 2016, 01:26:17 PM »

When you say 'rough frame' do you mean the internal support/frame of the door? It's all 2 x 4 under the molding, I don't think there are any gaps.

I tried the light test and noticed a few leaks. what's the best way to go about fixing those?

Thanks.

Randy S

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Re: Replaced Door but No Improvement?
« Reply #3 on: July 19, 2016, 05:02:25 PM »

here is the link to address the door leaks and more.
http://www.soundproofing.org/infopages/soundproofing_doors.htm

do this first and see what it yields and from there you can increase the mass of the door by adding mass loaded vinyl to the door.

Randy S.
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

Vermithor

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Re: Replaced Door but No Improvement?
« Reply #4 on: October 04, 2016, 01:11:27 AM »

So I'm planning to get some soundproofing adhesive tape. Another thing suggested on that page was so add a second door to improve soundproofing.

How much of an improvement could I expect by fully sealing the door's perimeter + adding another door with about an 8" gap between?

Thanks.

Randy S

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Re: Replaced Door but No Improvement?
« Reply #5 on: October 04, 2016, 04:48:09 PM »

Depending on the weight if the doors and the seals created you could see quite a reduction, this is an application we use for recording studios often and yields great results...remember it is the weight of the doors that counts. ex 2" solid oak doors are about 8lbs sqft.

Randy S.
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040