Built-up roofing (BUR) is the most common roofing material used in flat roof surfaces or low-slope roof styles. Made up of layers of material that are laminated together, it is primarily composed of four components: a base sheet, felt, bitumen and a surfacing component like gravel or asphalt on top.
A quick search for local roofing contractors online will give you a great number of results. Not all of them, however, can be considered trustworthy. It pays to be careful when you are dealing with an unscrupulous contractor, which means you have to be aware of the signs. Kirtley & Sons Roofing discusses them here […]