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Straw Bale Retrofit Workshop — 4 Comments

  1. I have a question about retrofitting with Straw bales. Is it possible to retrofit with bales on the INTERIOR of a stick frame house? Specifically, a stick frame house wrapped with brick veneer. As with a typical brick veneer, there is an airspace between the house framing and the brick. I realize I would lose some interior space but that’s okay with me. Here’s my proposal. Remove drywall from interior of wall, remove existing insulation and wiring, stick strawbales into the framed wall, notching where needed, so that the wall cavity would be insulated with straw. then run new wiring on inside of straw bale wall. The outside edge of the straw wall would be adjacent to the plywood sheathing attached to the framing. Would this trap moisture? Would I somehow need to plaster the backside of the bale before sticking into the wall? Has this been done before? Thanks for any comments/thoughts.

    • Something very similar to what you describe is shown in my DVD A Sampler of Alternative Homes, available at http://greenhomebuilding.com/store.htm
      With airspace between the brick veneer and the studs, I would not expect condensation at that level. Plastering the backside of the bales would be a good idea for several reasons: earthen plaster can deal with humidity well, and this would contribute to fire safety.

  2. We have a 16×80 single wide mobile home on a permanent foundation. Would like to add a livable “sunspace” on the south side using strawbale construction. Is it allowable in New Mexico. Also have questions about using cargo containers and strawbale

    • Yes, you should be able to build a strawbale sunspace onto your “mobile” home in New Mexico, with drawings stamped by an architect or engineer. NM has a state-based building code, so wherever you are in the state, the code applies, and some cities (like Albuquerque, Santa Fe, & Las Cruces) might have slightly more stringent codes.

      Likewise, you could wrap a cargo container with bales to insulate it, although I don’t personally know of anyone who has done this (yet). This would probably not require a building permit. Obviously, if you choose the wrapping option, you will need to put the bales on a proper foundation, build a roof over them, and plaster them. I would also recommend plastering the inside of the bales, which would touch the container, with a thick coat of mud plaster. The metal will cause moisture to condense on its surface, and over time cause the bales to rot. Adding a mud layer in between (NOT cement stucco), would absorb the moisture and help to mitigate negative effects on the straw. Personally I would suggest doing more research on this topic before moving ahead with the project.
      Best Regards,
      Catherine Wanek

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