Spanish slate is a roofing material that is well-liked in the UK due to its exceptional quality and durability. The material cost of Spanish slate varies depending on its quality, size, and thickness. In contrast, fibre cement tiles cost about £18 per square metre and have an installation cost of around £15 per square metre. These tiles have a lifespan of around 30 years, resulting in an annual cost of approximately £1.10 per square metre. On the other hand, clay tiles cost around £40 per square metre, with an installation cost of £15 per square metre and they last for 40 years. This translates to an annual cost of about £1.25 per square metre. Spanish slate can last up to 100 years or more, resulting in an annual cost as low as 25p per square metre.