Proudly Serving Long Island NY

Flat Roofing Services Long Island

JAGG Roofing, Siding and Windows produly serves homeowners and businesses across Suffolk and Nassau County with roofing, siding and windows services.

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Flat roofing in Long Island, New York needs a system built for rain, wind, heat, snow, and salt air. Many flat roofs sit on home additions, garages, extensions, multi-family properties, and commercial buildings across Nassau and Suffolk County. When the installation process is rushed, water drainage suffers and small seams can turn into roof leaks. A proper flat roofing system helps protect the structure, improve energy efficiency, and reduce repair costs over time. For local help with flat roofs, JAGG Roofing, Siding & Windows provides roofing service options across Long Island.

Local. Reliable. Proven by Long Island Homeowners.

      EXCELLENT  
   Based on 9 reviews 
    
 
 
 
   
 
 
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   Bernard Colletti 
 
 
 
 Trustindex verifies that the original source of the review is Google. Can't say enough about this company. From beginning to end they assisted me with my remodeling. They were extremely transparent with pricing and showed me every detail of what they were doing as they were doing it. They gave me options and didn't force me into making a decision. They came with an elite team and got right down to business I was really impressed on how clean they were and how proficient they were in the details. I would recommend them to anybody looking to renovate.
  
 
      Posted on Google  
   
   Humberto Kibel 
 
 
 
 Trustindex verifies that the original source of the review is Google. I recently had the pleasure of working with this roofing and window company, and I couldn’t be more impressed with the entire experience. From the initial consultation to the final installation, their professionalism, attention to detail, and commitment to quality truly stood out. The team was punctual, respectful, and extremely knowledgeable. They took the time to explain all my options clearly, helping me choose the best materials for both my roof and windows without any pressure. What really set them apart was their communication. They kept me informed throughout the entire process, answered all my questions promptly, and made sure I was completely satisfied every step of the way. My home looks amazing again! Thanks Tom for making it an easy choice to go with your team.
  
 
      Posted on Google  
   
   Kelly Geller 
 
 
 
 Trustindex verifies that the original source of the review is Google. outstanding work. They were extremely attentive and on time and the roof came out amazing
  
 
      Posted on Google  
   
   Michael Geller 
 
 
 
 Trustindex verifies that the original source of the review is Google. Fantastic work done on my roof. Looks amazing and could not be happier!
  
 
      Posted on Google  
   
   Michael Friedmann 
 
 
 
 Trustindex verifies that the original source of the review is Google. I highly recommend Jagg Roofing and Siding to anyone looking for top-quality work and a smooth, stress-free experience. From the initial consultation to the final walkthrough, everything was handled with professionalism and attention to detail. Tom, the project planner, was exceptional throughout the entire process. He took the time to explain every step, made sure all my questions were answered, and kept everything organized and on schedule. His communication and expertise really stood out, and you can tell he genuinely cares about delivering the best results. The crew did an outstanding jobefficient, clean, and clearly skilled at what they do. The finished work looks amazing, and the quality is something you can see right away. If you want a company that’s reliable, honest, and delivers excellent results, Jagg Roofing and Siding is the way to go. I wouldn’t hesitate to use them again.
  
 
      Posted on Google  
   
   D B 
 
 
 
 Trustindex verifies that the original source of the review is Google. JAGG was an absolute pleasure to work with. I actually found them on Instagram and decided to reach out for a quote. After doing my due diligence and getting a second estimate from another company, it became clear that JAGG was the right choice. From our first meeting, their professionalism and experience really stood out. Jacob and his team did a fantastic job from start to finish, and I couldn’t be happier with the results. I highly recommend JAGG to anyone looking for quality work and a professional, reliable team.
  
 
      Posted on Google  
   
   James Miles 
 
 
 
 Trustindex verifies that the original source of the review is Google. JAGG Roofing, Siding and Windows did an outstanding job from start to finish. Jacob was very easy to work with. Professional, responsive, and genuinely helpful throughout the entire process. He took the time to explain everything clearly, answered all of my questions, and made sure I felt comfortable every step of the way. The quality of the work speaks for itself. The crew was punctual, respectful, and kept the area clean. Everything was completed on time and exceeded my expectations. If you’re looking for a reliable and honest company, I highly recommend JAGG Roofing, Siding and Windows. Ask for Jacob,  you’ll be in good hands!

Our Services

Complete Roofing Solutions.

Roof Repair

Fast, reliable roof repairs for leaks, storm damage, missing shingles, and other roofing problems before they become bigger and more expensive.

Roof Replacement

Complete roof replacements designed to improve protection, curb appeal, energy efficiency, and long-term value for your home or commercial property.

Emergency Roof Repair

24/7 emergency roof repair services for storm damage, active leaks, fallen branches, missing shingles, and urgent roofing issues that cannot wait.

Why Flat Roofs Need the Right System on Long Island

Flat roofs are not truly flat. They need a slight slope so rain and melting snow can move toward drainage systems instead of sitting on the roof surface. Long Island weather conditions can make this more important because coastal storms, freeze-thaw cycles, and summer heat all stress roofing materials. When water sits too long, it can weaken seams, flashing, and membrane application areas. That leads to Flat Roof Repair, Roof Leak Repair, and sometimes full roof replacement. Good design gives the roof better weather resistance and a longer service life.

Common Flat Roofing Materials for Nassau and Suffolk County

Flat Roofing materials are chosen based on the building, budget, roof use, and exposure. EPDM rubber roofing is known for flexible waterproof protection, while TPO Systems and PVC roofing can support UV resistance and energy efficient performance. Modified bitumen roofing, Built-up roofing, and Torch Down Roofing are also common choices for flat roof installation and Commercial Roofing. The U.S. Department of Energy explains that cool roof materials can reflect more sunlight and absorb less solar energy, which can help lower roof surface temperatures. This matters for Long Island buildings that get strong summer sun.

Why Delaying Roof Replacement Can Cost More

Small leaks can lead to damaged plywood, mold, insulation issues, and structural problems. Addressing them early with a full roof replacement can save thousands in future repairs.

Signs It May Be Time to Replace Your Roof

Missing Shingles

Water Stains in the Attic

Sagging Roofline

Curling Shingles

Granule Loss

Repeated Repairs

Serving Suffolk County and Nassau County Property Owners

From roof repairs and full roof replacements to siding upgrades and new window installations, JAGG Roofing, Siding and Windows proudly serves homeowners, business owners, property managers, and commercial properties across Long Island. Browse your area below to explore the roofing, siding, and window services available near you. If you do not see your town listed, contact us to confirm nearby service availability.

Suffolk County

We serve towns and hamlets across Suffolk County with reliable roofing, siding and window services built for Long Island changing weather conditions.

Nassau County

From established suburban neighborhoods to coastal communities, JAGG helps Nassau County residenets protext and imporve their properties.

Why Choose EPDM for Your Flat Roof?

EPDM Systems are often used because the material is flexible, durable, and well-suited for low-slope roofing. This commercial-grade rubber membrane can expand and contract as New York temperatures change through the year. That movement matters because heat, cold, and moisture can pull at seams and flashing. If the system is installed correctly, EPDM Rubber Roofing can create a strong waterproof seal for homes, garages, and commercial properties. It is still important to schedule flat roof inspections because even strong membrane technology can fail when punctures, clogged drains, or poor flashing are ignored.

Flat Roof Repair, Leak Repair, and Drainage Problems

Flat Roof Repair usually starts with finding where water is entering the building. The problem may come from damaged seams, chimney flashing, vent penetrations, ponding water, or old coating applications. Roof Vent Pipe Repair and leak repair should be handled early because moisture can move under the membrane before it shows indoors. The EPA explains that roof choices can affect heat absorption and building performance, so repairs should protect both waterproofing and energy efficiency. If a leak is ignored, insulation, ceilings, walls, and interior finishes can all be damaged.

Flat Roofing Materials for Long Island Properties

Different flat roofing systems offer different benefits. The right choice depends on the building, drainage needs, weather exposure, and long-term maintenance plan.

Flat Roofing Material	Best For	Main Benefit	What to Watch For
EPDM Rubber Roofing	Garages, home additions, extensions, and low-slope residential roofs.	Flexible rubber membrane that helps create strong waterproof protection.	Punctures, open seams, clogged drains, and flashing issues should be checked during inspections.
TPO Roofing	Residential and commercial flat roofs exposed to strong sun.	Reflective surface can support better energy efficiency and lower roof surface heat.	Seams need proper installation and welding to help prevent future roof leaks.
PVC Roofing	Commercial buildings, high-exposure roofs, and properties needing strong membrane performance.	Durable membrane with strong UV resistance and reliable waterproofing when installed correctly.	Material cost can be higher than some other flat roofing options.
Modified Bitumen	Older flat roofs, repairs, and low-slope roofing systems.	Layered protection that can perform well when drainage and flashing are handled correctly.	Heat, sun exposure, ponding water, and aging seams can lead to repair needs over time.
Built-Up Roofing	Commercial flat roofs and larger buildings that need multi-layer protection.	Multiple layers can add durability and waterproofing strength.	Heavier system, more labor, and proper drainage planning are important.

Helpful tip: Long Island flat roofs should be inspected for drainage, seams, flashing, roof penetrations, and signs of ponding water. The best material is the one that fits the building, budget, and local weather exposure.

Preventative Maintenance Helps Lower Repair Costs

Preventative maintenance is one of the best ways to protect flat roofs in Nassau and Suffolk County. A roof inspection can catch small cracks, soft spots, clogged drains, loose flashing, and coating wear before they become expensive roofing repairs. This is especially important after heavy rain, snow, strong wind, or nearby tree damage. Routine maintenance also helps property owners plan for new roofs before an emergency happens. For commercial buildings, multi-family properties, and residential roofing, maintenance can support customer satisfaction because owners get fewer surprises and better cost control.

Flat Roof Installation and Replacement Considerations

Flat roof installation should include moisture evaluation, drainage planning, material selection, and careful membrane application. The roof deck must be checked before new roofs are installed because trapped moisture can shorten the life of the new system. A full roof replacement may also involve building and construction permits, depending on the town, village, or scope of work. Property owners should check local rules before starting major roofing work. OSHA also notes that roofing work requires fall protection planning, which is one reason experienced roofing contractors matter during installation.

Choosing a Flat Roofing Service on Long Island

A strong flat roofing service should explain the roofing materials, installation process, warranty details, drainage systems, and maintenance plan in clear language. Long Island property owners should also ask how the roof will handle weather conditions, UV resistance, waterproof protection, and future needs like solar panel installation or flat roof restorations. Some properties may also need related work such as chimney repair, copper and metal work, Metal Roofing, Shingle Roofing, or Architectural Shingles. The right roofing contractors focus on customer service, clean communication, and customer satisfaction from inspection to final cleanup.