Netnull’s visit to Mahu village

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Spring brought us the opportunity to visit Netnull in the village of Mahu, where we were welcomed by the company manager Magnus. This visit was an eye-opening experience for us, where we learned how to make straw bales and straw panels.

It was a hands-on experience, where we learnt about the way in which straw bales are made and how they in turn are used to build structural wall panels. Throughout the project, it has been important for us to physically test the different parts that make up the design and construction of a building in order to better understand the whole process. One part of this has been physical testing, to get a feel for the properties of the materials and the ways in which they can be put to good use.

In Netnull, we started with a straw-bale machine, into which we lifted loose straw. The machine moulded the straw into bales and we were able to adjust the density and size of the straw bale. The width and height of the bale were fixed by the machine, but the length could be adjusted as needed. Lifting the straw bales was a useful lesson about the size and weight of elements that can be carried and assembled by a human, and when it is necessary to use technological support.

Once the packages were ready, we started to build the wooden frame that formed the supporting structure of the panel. Inside the frame we started to stack the straw bales, using a crowbar to press the straw as tightly as possible into the frame. As a second method, we experimented with pressing the straw into the frame using a hydraulic press, which allowed the straw to be pressed much more tightly into the frame. Using the press, the frame was  built much faster and the work could be done with less manpower.

In addition to all the above, we were also given a strawbale to build a 1:1 scale mock-up of the floor to wall junction detail of the straw panels.

The hands-on collaboration with Netnull has been very valuable for our project as we have gained a lot of practical knowledge. 

We are grateful for the experience!