Roofing Contractors NYC includes installation of roofing on commercial buildings, repairing of existing roofs, installation of single-ply membrane roofing over concrete slabs, sanding and finishing of roofing surfaces. Furthermore, they can be called upon to install fixtures and devices like Automatic Identification System (AIS) and Automatic Drive Head systems. They also get involved in making alterations to electrical and ventilation systems and wiring. Their duties are completely professional and they adhere to the strict codes of construction and maintenance of buildings. This means that they should maintain safety standards at all times while undertaking tasks related to building construction or renovation.