Observing readymade installations of huge tetrapods on the coast of South Korea, I was overwhelmed by the sheer amount of concrete required to construct just one unit.

Video Jeremy Weihrauch

Each concrete tetrapod is a four legged unit, in a roughly pyramid form that stacks loose, modular pattern with other tetrapods to create sea walls.

I set about to re-create their forms, which appears simple but have a geometric complexity. In doing this I also came to realise just how much concrete is in each tetrapod. There is a tension here in the amount of heavy material used to protect coastlines from environmental degradation.

The forms of tetrapods remain beguiling but I have chosen to fill them with air, moving in and out of each sculptures walls. They become much lighter objects and have also been made with only recycled and re-used inflatable fabrics. As they move against each other, inflating and deflating, they behave like the waves that break upon tetrapods on coastlines around the globe. They become the storm surge.