1. Natural Roof Slate Varieties Argentinian Slate Used for heritage products in the UK, Argentinian slate may not be as well- known but certain styles will last over a century. Brazilian Slate Durable and created using non-traditional methods, Brazil is now the world’s second largest supplier of slate tiles and a firm favourite for its long-lasting quality. Canadian Slate Designed to withstand extremely harsh winters, Canadian slate tiles work well with both Welsh and naturally mined British products. Spanish Slate A leading design in roofing, Spanish slate is perfect for regulating indoor temperatures and has been used in the UK since the 1300s. Welsh Slate One of the most aesthetically beautiful tiles on the market, Welsh slate is also one of the oldest with deposits dating back 600 million years. https://classicroofingbuilding.co.uk/