Externally, there is a very wide range of finishes to choose from. While tiles still account for most residential roofing jobs, they certainly aren't the end of the story. Sheet metal, cement tiles, traditional slate or ceramic tile are all readily available. For low-slope roofs, high-tech polymer membranes now compete with the old asphalt roll roofing, coal tar, and asphalt-mop technologies. Your decision will probably be driven by appearance, cost, ease of installation and practicality.

The roof will, of course be well insulated with a suitable type of cladding, which will need approval from the planning office.

You will also need to ensure you keep all the heat in your property by using sufficient loft insulation

As much as a third of your heating costs could escape through your roof.  Loft insulation is a very effective way to reduce your heating bills.

Insulating your loft to a recommended depth of 270mm (10.5 inches) and you can save wasted energy and money.

Loft insulation brings many benefits, and these include:

• Reduced heating bills by up to one third.
• A warmer, more comfortable home in winter.
• A cooler house in summer.
• Improved resale of your home.
• Reduced risk of condensation.

Once your loft has been insulated, the roof space will be much colder than before.  This is because less heat will be lost through the roof.  Before insulating your loft, you should consider the following:

• Any tanks and pipes in the roof must be properly insulated to avoid frost damage.
• The roof space must be properly ventilated to prevent condensation forming on timbers and causing decay. 
• Try to seal all holes around pipes and cables leading to the loft, to prevent entry of moist air from the home.
• Add a walkway or platform in the loft (for access to tanks, etc.).  Ensure it is adequately supported above the insulation (this is to avoid compressing the insulation, which will reduce its insulating qualities).
• Try to re-route electric cables above the insulation, to avoid overheating of cables.
• Your installer will advise on all the above points.

While considering the roof, you also need to think about your guttering and down pipes. These are typically available in cast iron, aluminium or plastic and will affect appearance and cost. Wolseley's Drain Center offer advice and products to fit every need.