Author Topic: Soundproof a condo against neighbor's rooftop HVAC noise  (Read 5287 times)


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Soundproof a condo against neighbor's rooftop HVAC noise
« on: May 16, 2011, 12:43:51 AM »
I own an upper condo unit. On rooftop are my HVAC heat pump and my downstair neighbor’s HVAC heat pump. After a storm, my neighbor's HVAC started to create loud noise, measured up to 62dB in my room. It depressed me, as I am a sensitive listener. What are the best soundproof solutions to this? How effective can it be? I am not sure how cooperative the owner will be, as I described below.

The owner does not live here and did not give any positive response back. HOA sent the owner a non-compliance notice. But the owner did nothing. HOA has a difficulty in fixing the problem on its own, as they can access HVAC, but cannot access the switch without agreement, as the switch is in the owner's home. As I ask HOA resolve this, I need to have a pesudo-permanent solution, as I need to rent and sell the property in the future.

The solution needs to be good enough so my disclosure upon home sale will not be a problem for me. Any suggestions?

Randy S

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Re: Soundproof a condo against neighbor's rooftop HVAC noise
« Reply #1 on: May 16, 2011, 06:03:01 PM »
You will need to decouple the unit from the roof and all hard connections with anti vibration pads.The you will need #2 MLV (mass loaded vinyl) in a footprint 2' around larger than the unit or cluster of units.

This will give the best reduction value for the cost. Now keep in mind you will still have the hard pipe connection that go into the building, this transmission path will remain unless you open walls.