Long Island Roofing and Siding Contractor You Can Trust

Residential & Commercial Roofing and Siding Pros

Residential & Commercial Roofing and Siding Pros

Serving Long Island for 30+ Years. Family-Owned & Operated Long Island Roofing, Siding, and Window Installation Contractor

Suffolk County Roofing Contractor


Our Owens Corning Preferred Roofing Contractor Accreditations have earned the trust of Long Island for over 30 years! Free quotes for roof repair, replacement, and new construction installation.

Suffolk County Siding Contractor


GNP Roofing and Siding offers a wide variety of vinyl siding installation options, including modern board and batten, classic lap, scalloped or staggered shake. We’re Long Island’s Premiere Siding Contractor.

Suffolk County Window Installation


Upgrade your home’s beauty and functionality by replacing your windows. We offer energy-efficient and user-friendly windows installation with top-name brands. Replacement window experts.

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Roofing Siding Window Contractor Serving Long Island, Suffolk County

5 Star Long Island Roofing & Siding Contractor.
We’re On Top Of Roofing, Siding & Window Installations & Repairs.

  • 24/7 Emergency Repair

  • New Roof Install/Repair
  • Flat Roof Install/Repair
  • Shingle Roof Install/Repair
  • Siding Repair & Install
  • New/Replacement Window Install

  • Entry Door Installations

  • Ornamental and Decorative Additions

  • Gutter Repair

  • New Gutter System Installations

  • Commercial  Flat Rubber Roof Installations

Window Installation Suffolk County
Suffolk County Liscensed Contractor

Highly Experienced Long Island Contractor 30+ Years

Licensed Contractor in Suffolk County

For over 30 years, GNP Roofing and Siding has been a licensed and insured contractor servicing Long Island Suffolk County. As a family-owned and operated business, we prioritize fairness and honesty in all our services. We set ourselves apart from the competition in the industry by delivering quality contractor services, using the best products at a fair price. The owner is at every job overseeing The project with all work done by GNP Roofing and Siding Employees and no sub-contractors.

Contact us today for a free estimate on your roofing, siding, and window needs!

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.

Get in touch today – Long Island COntractor

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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.