The cost of roofing materials can vary significantly, depending on the type and quality of the material. Here are some approximate costs of common roofing materials:

• Asphalt shingles: £30 to £70 per square meter
• Clay tiles: £50 to £150 per square meter
• Slate tiles: £80 to £200 per square meter
• Metal roofing: £60 to £180 per square meter
• Flat roofing materials (felt or EPDM rubber): £50 to £150 per square meter

If you're considering replacing your existing roof, the cost will depend on the size of your property and the type of roof you have. On average, a roof replacement can cost between £5,000 to £15,000 or more. However, this cost can be higher if you need to replace other components, such as gutters, fascias, and soffits.

Insulation is an essential component of any roofing system, and it can help reduce your energy bills and make your home more comfortable. The cost of insulation can range from £500 to £2,000 or more, depending on the type and quality of the insulation material.