Flat roofs or roof with a very low angle can be covered in a number of materials depending on budget, use and exposure.
This is the most cost effective method of covering a flat roof of a garage or extension, the down sides are;
This is a tar product that is melted a poured over the roof it is therefore more expensive than felt. It usually has a 20-25 year life span.
The cons to using asphalt are;
A glass fibre mat is laid over the roof, then a resin is applied and finally a coloured topcoat is applied. This gives a very strong roof covering in any one on a hundred different colours, it in ideal for roofs that are very exposed to the elements of where you wish light pedestrian access. It can also be applied to shallow pitched roofs. A GRP roof should have a life span of at least 25 years.
The cons with GRP roofs are;
Lead covered roofs have been around for hundreds of years and it is still used today. It can be used on any flat and most pitched roofs. It is very flexible and so can be shaped to most positions required. It is life span of hundreds of years if fitted correctly and has an attractive finish when weathered in. It is widely used on listed buildings.
The cons to Lead are;