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Top-Rated Flat, foam, or single ply roofing installers and replacers in Greenport - Updated Nov 2026

Avatar for Four Seasons Roofing
Four Seasons Roofing
4.6(
150
)
Flat, Foam, or Single Ply Roofing - Install or Replace

Serving Greenport, NY and surrounding areas

Approved

In business since 1983

Free estimates

Emergency services offered

"Bill Taylor, the President of the company, carefully surveyed the condition of the roof. His detailed, clear estimate addressed all of my concerns. The crew assigned to the project was efficient and courteous. The company is GAF certified, ensuring the warranty will be honored. I highly recommend Four Seasons Roofing."
GAF Preferred Contractor Badge
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+19

Response time2 days
Response rate100%
15 neighbors recently requested a quote
Avatar for JI ROOFING & EXTERIORS CORP
JI ROOFING & EXTERIORS CORP
4.9(
94
)
Flat, Foam, or Single Ply Roofing - Install or Replace

Serving Greenport, NY and surrounding areas

Approved

In business since 2012

Free estimates

Warranties offered

"This was the best experience I have ever had dealing with a contractor. Jacob and his team went above and beyond my expectations. Jacob was able to stay within our budget. Cost that was estimated is what was invoiced at the end of the job. We started off with just getting our roof replaced but then decided to put a new roof and siding on our garage. Everything was done within two days. Left the outside of our house spotless. I recommend JI Roofing to everyone that needs to get their roof and or siding done."
Termination
Work Completed
New Roof
Rip existence Roof
Roof Installed

+81

Response time7 hrs
Response rate96%
Recommended by94%of homeowners
Avatar for Non Stop Home Improvements Inc
Non Stop Home Improvements Inc
5.0(
57
)
Flat, Foam, or Single Ply Roofing - Install or Replace

Serving Greenport, NY and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Nonstop home improvements were great! They were recommended to us, and I would highly recommend them as well. They thoroughly took care of us, addressing any concerns we had and made the roof replacement easy. They tore up two layers of shingles, replaced the wood underneath and layered new shingles. All for a fair price!"
New Roof - Setauket
New Roof - Setauket
New Roof - Setauket
New Roof - Setauket
New Roof - Setauket

+12

Response time1 day
Response rate100%
2 neighbors recently requested a quote
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.8(
154
)
Flat, Foam, or Single Ply Roofing - Install or Replace

Serving Greenport, NY and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"We just had a roof done by home genius exteriors. We started with Justine at our door setting up an appointment for someone to tell us about the process. The next day Dan came and explained how the company works. He even crawled around our attic to show us the damage. Within 2 days our roof was in the process of being installed. Zach the project manager stopped by 3 times during that day to see how the work was being done. What a professional company. Everyone that we spoke to or met was very professional and friendly,. I would highly recommend this company for installing a roof."
Roofings
Roofings
Roofings
Roofings
Roofings

+86

Recommended by97%of homeowners
Avatar for Alta Renovations Corp
Alta Renovations Corp
5.0(
30
)
Flat, Foam, or Single Ply Roofing - Install or Replace

Serving Greenport, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"If I could give 10 stars I would. Jose and his crew showed up every day, on time…even working Saturdays AND a holiday! I am beyond thrilled with the results of our remodel. Jose was professional, fair and meticulous with his work. He went above and beyond in so many aspects, and gave excellent expert advice. Any time I EVER need anything done again, I will be calling Jose and Alta Renovations!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+26

Response time8 hrs
22 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for JAGG Roofing, Siding and Windows
JAGG Roofing, Siding and Windows
5.0(
9
)
Flat, Foam, or Single Ply Roofing - Install or Replace

Serving Greenport, NY and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"Jake and his crew did a great job, I was adding solar panels to my roof and wanted new shingles and plywood to support the installation. I called several companies and found JAGG to offer the best price. I was very happy with the work, one day, full crew everything done. very impressed with the cleanup, not a nail to be found. LI Solar even asked for there information!! If you need Roofing , siding or Windows give JAGG a call. Excellent, 5 star work!!"
73 neighbors recently requested a quote
Avatar for Riteway Roofing and Chimney
Riteway Roofing and Chimney
5.0(
9
)
Flat, Foam, or Single Ply Roofing - Install or Replace

Serving Greenport, NY and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

Welcome to Riteway Roofing and Chimney! We are committed to exceeding your expectations. As experts, we will handle your needs with the high quality expertise that your home or business deserves. We offer competitive prices and customer satisfaction is our number one priority. Call us today!

29 neighbors recently requested a quote
Avatar for King Quality Roofing and Siding
King Quality Roofing and Siding
4.5(
20
)
Flat, Foam, or Single Ply Roofing - Install or Replace

Serving Greenport, NY and surrounding areas

Approved

In business since 1988

Free estimates

Emergency services offered

King Quality Roofing and Siding is proud to be a locally owned and operated business that has been serving the community since 1988! With years of experience and unmatched expertise, we can help with any and all of your roofing and siding needs. Since opening our doors we have built our business on providing customers with the highest quality products and craftsmanship, at a fair price. You can count on our team to be timely, tidy, and when the job is done, that you will be 100% satisfied with the work completed. Let us show you the King Quality difference, get in touch today!

North Babylon Home After
North Babylon Home Before
Jeff and Crew
Beach house Shake Shingles
Beach house Shake Shingles

+1

Response time1 day
1914 neighbors recently requested a quote
Recommended by80%of homeowners
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Showing 1-10 of 265
FAQs for flat, foam, or single ply roofing installation and replacement projects in Greenport, NY

Many roofing pros point to PVC as the top performer on flat roofs thanks to its tough seams and long-term waterproofing. A properly installed PVC membrane can last 30 years or more, resisting ponding water and harsh weather with ease. You will pay more up front than you would for EPDM, but the added durability often translates into fewer repairs and a lower cost per year of service.

Yes, a rubber roof is an environmentally friendly choice. Most rubber membranes contain recycled content and can reflect heat, which helps trim cooling bills in hot weather. Manufacturing has a lighter footprint than many traditional materials, and the long lifespan means fewer tear-offs headed to the landfill. If sustainability is a priority, ask your roofer about brands that carry third-party eco-certifications and confirm they meet local environmental standards.

The Greenport, NY homeowners’ guide to flat, foam, or single ply roofing installations and replacements

From average costs to expert advice, get all the answers you need to get your job done.