Why Choose Us

Tom Jannace Roofing Offers Service You Can Trust

Why Choose Us

Tom Jannace Roofing features and installs GAF roofing materials and accessories. Founded in 1886, GAF Materials Corporation is one of the oldest manufacturers of commercial and residential roofing materials in the United States, and its proud tradition of innovation and excellence has made it one of the most respected.

GAF Materials Corporation offers the most comprehensive line of quality roofing systems in the industry. Whether your design calls for a standard 3-tab shingle, an architectural shingle, a conventional built-up roof, a modified bitumen system or a composite system, GAF’s superior products and roofing specifications will meet your needs for a complete single-source installation.

Celebrating 30 Years Of Custom Satisfaction Serving Long Island

  • We have roofing liability and roofing workers compensation insurance.
  • We never subcontract any of our work.


  • No dumpsters used on job site.
  • Roofing is our only business.
  • Most jobs are completed within 1 day.
  • We invite you to our office to pick and choose references.
  • We have an A+ rating with the Better Business Bureau.
  • Specially trained GAF certified company, license #CE18434.
  • Preferred contractor with Owens Corning, ID #208339.
  • Select Shingle Master with CertainTeed.
  • You deal directly with the owner.
  • Free written estimate and complete inspection, no obligation.
  • Updated insurance certificates provided with detailed written estimate.
  • Offering a full line of seamless gutters and leaders.
  • Our office staff is available Monday through Friday from 8AM-6PM and on Saturday from 9AM-3PM.