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Soundproofing Forum Topics => Other Soundproofing Questions => Topic started by: Jeanne on July 14, 2010, 05:51:32 PM

Title: AN ICF wall as a sound-blocking fence?
Post by: Jeanne on July 14, 2010, 05:51:32 PM
I live on a busy road and want to block as much traffic noise as possible from my backyard. We've narrowed it down to a wooden fence with MLV inside and a stuccoed concrete wall.  But then someone told me to consider an ICF wall (2 rigid sheets of insulation with rebar and poured concrete inside). Its main application is for exterior walls of buildings. Some websites say it has an STC rating of 55. But when I google it, I can't find any info on it being used as a sound-blocking fence. 

Has anyone heard of this being done?
Title: Re: AN ICF wall as a sound-blocking fence?
Post by: Randy S on July 14, 2010, 07:46:07 PM
Ok, both ideas will deliver reduction. Here is how you address outside noise issues, the denser the wall (lb. per sqft. weight) the better the noise reflector (barrier) you have.
Now to actual get results you have to understand the defracted path. The closer to the source and the higher the wall the better reduction value you achive, at the same time your distance to the wall also dictates how much value you will experience this is known as the shadow path.
These variables should be assessed before you worry about materials or cost because you might need a wall that exceeds 12' in height or higher and where it needs to be placed in relationship to the source. Noise abatement walls next to freeways normally are or exceed 20' and are placed next to the freeway in order to achieve the best reduction value.

You can contact me directly if you would like me to help you figure this out.

Randy S.
760-752-3030 ext 104
Title: Re: AN ICF wall as a sound-blocking fence?
Post by: Jeanne on July 15, 2010, 02:17:09 PM
Thanks for the reply. I've already figured out the size and location. The fence/wall needs to be 8' high x 30' long. As I understand it, the fence should be either close to the source of the noise or close to the receiver of the noise. In my case, it cannot be close to the source because we live on a corner lot and the fence/wall would block views of the intersection. Therefore, the fence/wall will be situated close to the receiver, i.e., my family relaxing on the patio.

I'm trying to figure out what the material should be. Has ICF been used as a sound-blocking fence/wall? If it is such a good sound-blocker, why can't I find anything about it being used for residential fences? Is it too expensive? Is it not stable enough to be used as a free-standing wall?

Any info is greatly appreciated!