Spec roofing contractors supl at 10305 gardner rd, dallas, tx 75220, find spec roofing contractors supply company details - roofers in dallas tx. let ehardhat help you do the research before you hire!. Roofing dallas as compared to other cities. roofing varies state to state, not just in installation traditions but in color and styles available.in the dallas area there are several roofing factories., roofing dallas as compared to other cities. roofing varies state to state, not just in installation traditions but in color and styles available.in the dallas area there are several roofing factories.