J & J Roofing undertake a wide range of slating, tiling and new roof projects, we are able to work with both natural slate or fiber man-made slate plus a wide range of concrete and clay tiles. Affordable, flexible, guaranteed roof repairs Water stains on your ceiling or running down your walls are both sure signs that you could have a leaky roof. While you may well have a list of other pressing priorities, ignoring a leaky roof is never a good idea. Asphalt Roofing also referred to as bitumen is a very popular way of covering flat roofs or roofs where there is a slope, the problem with asphalt roofs is their susceptible to weather damage due to the lovely English weather.