Certified

Ownes Corning

As an Owens Corning Roofing Preferred Contractor GNP Roofing & Siding is part of an exclusive network of roofing professionals who meet the highest standards and strict requirements for professionalism and reliability.

GNP Roofing, Siding and Window Projects

Take a look at a handful of our completed projects across, Suffolk County Long Island. From siding and roof replacement to window, door, and gutter installations, GNP Roofing and Siding is proud to be your local Long Island contractor for any exterior remodeling project you have. Famil-owned and operated contractor for over 30 years.

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    “Outstanding Work”

    Yesterday George and his wonderful team of workers did a roof replacement on my house. They did a superb job. I was very pleased with the quality of work on my roof. After the job was done they did an amazing job of cleaning up which left my property spotless. I hired George on the spot after discussing the job and estimate with him. He’s an honest contractor who delivers what he promises. I would recommend George in a heartbeat.

    Judy