Kervalet Extension is a minimalist home located in Brittany, France, designed by Exercice. This extension in Brittany opens the house widely to the outside space with large anodized aluminum sliding frames. The structure is designed as a superposition of different materialities that let in as much light as possible. On the outside, three galvanized steel shutters slide thanks to grooved wheels and a series of metal brackets which serve as a guide fixed punctually on the slab nose.