In the past, the villagers used larch planks for the roofs of their houses, a fine choice of material given that it is waterproof, long-lasting and aesthetically pleasing, because even without treatment the shingles take on a silver-grey hue.It has to be dried for three to five years and two grooves need to be cut into it so that rainwater will run off the roof. Then, the two metre planks have to be offset so that water does not leak through the joints.Today, people often put corrugated iron for the first layer and then a single layer of planks on top for aesthetic reasons: this is false cladding.