[FYTON2V]

I'm setting up my HT in an existing room on the 1st floor of my house. My house is in Southern California so insulation is only a myth. Not much is used when building new homes and it's only used in outside walls. Since I watch movies mostly at night I want to keep the sound from waking up my family as much as possible. However, I don't want to tear out all the existing drywall in this room. SWMBO (she who must be obeyed) would find that unacceptable.


So... I'm wondering if there is a company out there that makes some sort of expandable foam insulation that can be sprayed through a small hole in existing finished walls. I'm hoping this foam can fill most of the empty space between my frames and joists and I would just have to patch a bunch of little holes in the drywall when done. Does such a thing exist? If it does, will it accomplish my goal?


Thanks.

 

[FYTON2V]

If there is another alternative by all means give me some advice. I could use all the adivce I can get.


Gracias.

 

[Toxarch]

Urethane Foam spraying companies are pretty new but I imagine you could find one out there. From what I have been told, urethane foam is a very good sound and temperature insulation. I do believe you can inject this foam into a wall like you are talking about. Only problem is that this can get expensive. I've considered doing this as well, but the cost and the thought of not being able to change it and wiring later were the major deterents for me.

 

[robertmee]

I don't know about foam, but you can rent the paper based shredded insulation sprayer from a Home Depot or Lowes. It works the same way....You cut a small hole into each cavity, about 1 1/4", and fill the cavity with the insulation. The sprayer has a hopper that you fill with insulation. There was just a recent thread on this, and several forum members have had good success with this very method.

 

[settopguy]

Some types of spray insulation settle leaving cavities at the top. I think shredded paper is prone to that.


The urethane foam probaly retains its shape, and may do a better job of getting into small nooks and crannies.


If the spray on insulation doesn't fully do the job, you may need to add layers to the theater walls, like a layer of gypsum board.


Remember the sound goes in all directions so think if there are any other paths through the ceiling, floors, around wires, pipes, or ducts.