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Adventures in Straw Bale Home Building
The March Hare: Issue 35

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Dancing Rabbit Ecovillage

Footprints in the Snow * Hopper's Index * New Member Bio: Gare * Lying alone in plush tufts *
Adventures in Straw Bale Home Building * Nature Corner * New Member Bio: Tamar


Adventures in Straw Bale Home Building

by Andra Eaks

This September, Penn and I began building our cabin. Somehow it seemed reasonable that two people, neither of whom had built a home before, could construct a cabin in a few short months. Boy those months felt long. We were part of a mad dash of folks trying to make their homes livable before the weather became too cold. Such pressure made for a few frenzied and tired months.

Sledgehammering the wall into place
Sledgehammering the wall into place

By Thanksgiving, Penn and I were at a point where we had our cabin ready for winter and could (whew!) take a break. We returned to Dancing Rabbit after a short holiday trip, only to find our building work wasn’t complete. While cleaning up the cabin one afternoon, we discovered our straw bale walls didn’t look as stable. In fact, some bales looked rather out of place. Uh oh, it seemed to be because…. our roof was moving! (yikes!)

[brief interlude to explain our house]
We did some experimenting when we were building. Instead of a concrete foundation, we used gravel and gravel filled bags. Our cabin is a loadbearing strawbale structure. It’s about as tall as it is long, with a 45 degree pitch and features a sleeping loft that spans half the cabin length. Atop the bale walls sits a rectangular frame, or roof bearing assembly (RBA). Connected to the RBA are the trusses, roof metal, you know, the parts that comprise the roof. The gravel foundation, the steep roof pitch, and the sleeping loft were construction ideas that hadn’t been used yet on loadbearing strawbale homes at Dancing Rabbit.

Tom gives it a shot
Tom gives it a shot
When you experiment, you learn, and in this experiment, we learned that a sleeping loft causes differential settling in the walls, and in our case, caused the roof to slide. Due to the extra weight of the sleeping loft, the RBA and all that was attached (i.e., the roof) slid westward. Actually, the roof movement wasn’t that drastic. The RBA slid along the bale walls about 6 inches. What drew our attention to the problem was the slumping of the bales in the walls. The bales in all but one corner of our cabin were no longer straight. Granted, our walls had a certain degree of wonkiness in their original state. But our walls looked as if they had been built by Dr. Seuss, curving in or out; they didn’t know the meaning of the word plumb.
[back to our story]

Needless to say, this discovery was a bummer. Our first plan of action? Stop sleeping in the loft. Then we came up with some fix-the-roof ideas that sounded reasonable and a few that weren’t so reasonable. Unfortunately, we couldn’t find any “how-to” or instructions on how to reposition the roof on your strawbale house. (Is this not a common problem?) Penn and I figured out a logical plan, from the list of reasonable ideas. We got our supplies together and asked for a few volunteers give us a hand. The morning of the big event, everyone (including dogs) was at our cabin to help, take photos, or sit in the cheering section. We were ready to start. What’s the worst that could happen?

A chain was attached to two eye bolts in the RBA. Another chain was attached to the locust tree in front of the cabin. The two chains met at a “comealong,” which is a tool used to move heavy objects. The comealong would pull the chains taut and move the roof back into place. Everyone was silent (including the dogs) as Bob cranked on the comealong. People were stationed at every corner to watch the walls for “we’re-gonna-collapse”-like movement. What would that look like anyway? We didn’t want to find out. Then, whoa, the roof started to slide, and after a few cranks on the comealong had moved back toward its original position. It was amazing to see the one and a half ton roof slide so easily. It was also rather scary, because we weren’t certain what would result from the movement. After the roof was moved about six inches we coaxed the bales back into place with sledgehammers.

Bob at work
Bob at work
The hammering also massaged out any tension that had built up in the walls during the movement process, thus preventing a spring-like effect in which the walls would just push the roof back out of alignment once the tension was let off the chains. Our walls had gone from wonky to pretty plumb. (You can’t have perfection with straw.)
Rachel and Gare watch the action
Rachel and Gare watch the action
While the roof was held under tension, we put posts against the loft side of the RBA. That way, if the roof wanted to move again the weight would be transferred to the braces and movement would be stopped. Not that we wouldn’t want to relive this fabulous experience, but now, hopefully, the next surprising structural problem won’t be a sliding roof.

This winter, with months of frenzied building and roof fixin’ behind us, I’m ready to hibernate, back in our sleeping loft again. But, our building days are far from over. Presently, our outside walls are covered with stylish blue tarps to keep the bales protected from the elements, until they can be painted with plaster this spring. The floor is gravel covered with rugs. Some doors are in place but have yet to be hung correctly. Not much can be done to complete such tasks during the winter, though. The cabin feels cozy now, but will be even more so once completed. It will be interesting to see how our gravel foundation handles the weather and how our RBA braces hold the loft. There are more building adventures waiting for us in the future, to be sure.

Learn more about Straw Bale House Construction


Footprints in the Snow * Hopper's Index * New Member Bio: Gare * Lying alone in plush tufts * Adventures in Straw Building * Lady Builder * Nature Corner * New Member Bio: Tamar


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