The Alterna diamond shaped slates are available in 3 models and 2 color : straight edges or not, with or without hook notch. Of a calibrated and regular thickness, Alterna slates fit every configurations as a roof tile or as a facade cladding.
UPSIDES - Aesthetic even more closer than mineral slate - More robust and lasting - Better guarantees - Outside stockage - Cut corners or not - Diamond shape, straight edges