24/7 Emergency Available
We're also available for emergency services.
Experts & Professionals
We are versatile, regardless of your home design, so we can help make right decision.
Total Satisfaction
We offer a quality reliable service. We strive for 100% satisfaction for residential and commercial.
Professional Inspection
We know you need professional help to get your project done the right way, that's why we're here.
Why Choose JGR?
Certified Company
Our company understand that in order to meet your needs, we must first understand your goals and maintain that focus throughout the project.
- Preconstruction Services, Cost Estimating & Bidding
- Construction Management
- Project & Contract Administration
- LEED Consultation & Implementation
- General Contracting
Why Our Team
Reasons to Choose Us
The owner of J. Great Roofing has been in this industry for over 20 years.
J. Great Roofing has am A+ rating with The Better Business Bureau, GAF & NRCA.
We offer the best pricing for the best service.
We work with Roofing Liability Insurance and Roofing Workman’s Compensation Insurance.
Licensed with Consumer Affairs with both Nassau And Suffolk County & has an A+ rating with The Better Business Bureau.
- No Subcontractors are ever used.
- All Jobs are completed in One Day.
- No Dumpsters on Jobsite.
1225+
Projects Complete
1345269
Sqft. Shingles installed
32
Active Experts
365
Days a Year
best values
J. Great Roofing & Siding is a Certified roofer with GAF.
GAF is North America’s largest* roofing manufacturer, with over 125 years of expertise in helping property owners and managers make their best and safest roofing choices. GAF products can deliver on any customized solutions.
J. Great Roofing & Siding stands behind GAF roofing products, you can count on consistency and the highest quality the industry has to offer.
our services
What We Offer for You
Our team is well versed in project estimating, management and feasibility.
Roofing
Multiple roofing technologies and solutions for both steep and low slopes.
Maintenance
A comprehensive Preventative Maintenance Program to avoid high cost on repairs in the future.
Affordable & Reliable
Economical roofing and repair solutions. Because it's worth more a happy customer than a full pocket.
Warranty
We offer lifetime warranties on all our products.
Free Inspections
Job site inspections conducted by experienced inspectors that make sure you will get a professional job and reliable products for your home.
Trustworthiness
Don't trust the integrity of your home and roofing system to amateurs and shoddy workmanship.
our mission
Building on Trust
With over 20 years of experience under our hard hat, we partner with owners and design professionals to build high-quality projects.
J. great Roofing will install your roof with an integrated system designed with multiple parts, engineered from advanced material technology. Each part of your roofing system then plays an integral part in waterproofing and protecting your home.
Online Reviews
What Our Clients Say
Howie Frey
Google Review“J. Great replaced the back half of my roof 2 years ago. Today they returned and replaced a large flat roof section over my Garage and an added on room. As always Jose and his team did an excellent job at an affordable price...”
Adrienne Marzano
Google Review“Jose and his crew just installed a new roof and gutters on my home. They were a pleasure to deal with and went out of their way to make sure everything was completed correctly and in one day. Their pricing is fair and the quality of the material and workmanship is excellent.”
Pretzelnek
Google Review“My roof looks FANTASTIC! My gutters reattached to perfection! My entire house looks great!
Thank you “J.Great Roofing” (Jose and crew) for a job well done! ”
Megan Reuss
Facebook Review“Such a great experience with J. Great Roofing! A friend recommended them and they did not disappoint. Great job. Great price. They cleaned up and were respectful of outdoor furniture, etc. And they even finished the job early! Highly recommend!”