Welsh slate is waterproof and unaffected by normal extremes of temperature, this is why it often remains intact after hundreds of years.
It’s surface is highly resistant to acids, alkalis and other chemicals making it the ideal roof covering in any part of the world.
It’s also colour-fast and non-fading, even in UV light, this is one of the reasons that it can still be found in medieval architecture.
The density of Welsh slate helps to stabilize the interior temperature and create a 21st century roof solution.