When we moved into our house, there was a shed in the garden. Its timbers were rotten, the floor had long since disappeared into the ground, there was no door, the window had fallen out and various creatures had moved in.

I decided to rebuild it out of a material that has been used around the world for hundreds of years, but is less commonly seen in modern buildings: straw bales. A year later, and the “work shed” is now nearly finished.

As sustainability assessment lead at Sheffield University’s Grantham Centre for Sustainable Futures, I wanted to make sure my garden office had the lowest possible embodied carbon (a term used to describe the amount of carbon contained, or “embodied” in the materials used to make a product), and low energy use once it was up and running.

That meant the office would need to be very well insulated to avoid using lots of energy to heat it, and made of materials with low carbon content.

Due to its structure, straw is a fantastic insulating material. It’s also cheap, easy to work with, and since the straw absorbs carbon dioxide from the........

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