It is a little nice being in the'do it yourself kind of business' like soundproofing. In today's world taking the family out on a Fri. night for dinner and a picture might cost you more than your monthly mortgage payment. That is why many families are opting for their own home Theater. If you've a spare room or an empty space in your basement or attic, you have got a potential Home Theater.
A better idea is to work with your present window exhaust fan walls by applying a new layer of
Windows Exhaust Fan drywall to the existing walls and ceiling but trying a layer of a product called Green Glue on the new drywall and sandwich it between the present wall and the new drywall. Now if your house theater is on a second floor, the ceiling now becomes less of a concern and now the floors become more of an issue . If you are planning on having carpet and pad for the finished floor in your theater, then a soundproof floor underlay would be in order. Something like Yank Impactless soundproof floor underlay or Yankee Impact Standard underlay. These are both recycled rubber products that would lie on top of of the wood or concrete sub floor to stop the airborne sounds of the home theater from traveling down to the people below.
The Impactless is a less dense rubber underlay and would be ideal for under carpet and
Attic Ventilation Fans pad. The North American Impact Standard would also be effective under the carpet and pad, but is more suited for hardwood and ceramic tile floors due to its sheer mass.
Other fears that you might have with your house theater would be doors and windows. Let's talk about doors for a minute ; if you're making an attempt to keep the movie in the home theater, then a hollow core door could be your worst enemy. Your best chance would be to go to Home Depot or Lowe's and purchase a solid core MDF or solid wood door. A genuine soundproof door could cost thousands, with a little time and well thought out planning ; you can get similar results at 1/4 the price tag.
the very last thing we want to talk about are the windows in your home theater. If neighbours are a concern, then I might suggest building window plugs with the 2' America Mat closed cell vinyl nitrile froth mat. As an example, if your window
Wall Exhaust Fan were 3' X 3', you would cut the foam to 3'1' X 3' 1' so giving the window plug and additional 1/2' around it's whole perimeter. This additional 1/2' will help to hold the window plug tightly into the window frame very like a cork in a bottle. If the window is 4' or more on either dimension, it is advised that the window plug be stuck to a backer board, something like wood paneling or Luaan. These wood panels can be found at home Depot or Lowe's.
Bob.... Out!!!