Sound Proofing a Waste Pipe (PICS included)

[mrmichaeljmoore]

I have a waste line from the upstairs bathroom in the ceiling of my new basement bathroom.
I will be boxing in the waste line (like a soffit).

But I wanted to know if anyone had any tips for adding some soundproofing to the soffit.

When the upstairs toilet flushes, it is quite loud in the basement bathroom.

Thanks.
mm

 

[begreen]

I used some 1" styrofoam lining when we boxed in our waste pipe from upstairs. It's not perfectly silent, but it did help. Be sure to leave a removable cover for the cleanout.

Maybe install an intercom system between bathrooms? That way at least you could warn the person. Look out below! Outgoing!

 

[mrmichaeljmoore]

Hmmm...styrofoam....good idea.

I just hope I will have enough room for it after I box it in. Unfortunately, the pipe is quite low.....
if not, I may try a little bit of fiberglass stuffed in there.

thanks for the help.
mm

 

[LLigetfa]

Sound proofing is a science. It is about decoupling, harmonics, and mass. For example, when soundproofing windows, they use different thickness of glass and vary the spacing. Batt insulation for soundproofing is less fluffy than thermal insulation. Drywall is hung from Z channel to decouple it from the supporting structure.

It doesn't look like you have a whole lot of headroom under the pipe. I would build a double soffit using 1/4" hardy backer. Leave a small air space between the inner and outer soffit.

 

[North of 60]

Cast is what would of done the trick if doing it from scratch.

 

[Reggie Dunlap]

Cast iron is much quieter than PVC. If you are going to stay with the PVC I'd wrap it in fiberglass, then box it with plywood and then drywall.

Doesn't look like you are going to have room for the door head casing if you build a soffit around the pipe?