Straw Bale Isolation?

Started by feralfrequency on 11 September 2009. 5 replies.

Originally posted at johnlsayers.com, topic 13606.

I have searched around the site and found some helpful insight on this. I am throwing around the idea of building the walls in my studio with straw bales. It seems people think that it would work well for broadband absorption. I am curious however of what kind of isolation a wall like this is capable of? Would it be sufficient enough for isolation between live and control rooms? How would it compare (isolation wise) to a double wall with staggered studs, air gap, rockwool and 2 sheets of drywall on each side? I am new here and have found so much useful information. Thanks in advance for everyones input. -Jay Henderson
I seem to remember a thread years ago about this. Two things were discussed. 1. Concerns of molding 2. If it was dry how to fire proof. Peace Tom
I saw that thread it helped a lot. The fire hazard part isnt an issue. They have tested the walls and they are more flame retardant than most standard construction. They are so airtight that there isnt enough oxygen to burn. (so they say) I found an STC rating for one certain house built in Idaho I believe. They stated that it had an STC of 57. We all know a double wall with 2x4 studs, rockwool, air gap and 2 pieces of 5x8" gyp on the exterior walls is anywhere from STC 58-63 or so. Any ideas of how to make the straw bale wall up around STC 67 without adding much more mass to it? The suckers are already going to be huge as is. Thanks again. -Jay Henderson
Your may find that your local code administration is going to dictate how you implement this type of green building in your community. CALIFORNIA HEALTH AND SAFETY CODE Guidelines for Straw Bale Structures http://strawbuilding.org/tech/code/cahnscode.html CALIFORNIA STRAW BUILDING ASSOCIATION http://www.strawbuilding.org/pages/main.php?pageid=1 Building with bales of straw has become almost mainstream http://www.greenhomebuilding.com/strawbale.htm Some good ideas about how to actually build and add walls with dowels and such.
Oh man, thank you all so much!! You have a great community here. This will be super helpful. Please if anyone else want to chime in. Please do.