R W Mulligan

We install durable residential roofing systems using asphalt shingles, cedar, and slate. Our solutions protect homes against weather damage while enhancing curb appeal. Backed by GAF warranties, our work ensures long-term performance and peace of mind for homeowners.

Our flat roofing services cater to modern homes and commercial properties. Using high-quality EPDM and energy-efficient materials, we deliver low-maintenance, cost-effective solutions. Expert installation ensures watertight protection and compliance with industry standards for lasting durability.

We specialize in cedar shingle installations, combining natural aesthetics with energy efficiency. Our cedar roofs offer lightweight, sustainable options with unique design versatility. Regular maintenance services preserve their beauty and extend lifespan for discerning homeowners.

We provide vinyl siding and custom metal work to enhance building exteriors. Our siding solutions improve insulation, weather resistance, and visual appeal. Expert craftsmanship ensures seamless integration with roofing systems for cohesive, long-lasting protection.

Our gutter installation and repair services prevent water damage by ensuring proper drainage. We use durable materials compatible with all roof types, including seamless gutters for optimal performance. Regular maintenance preserves system integrity and protects property foundations.

We specialize in residential and commercial roofing, including asphalt shingles, cedar, slate, flat roofs, siding, gutters, and custom metal work.

We offer GAF’s Weather Stopper System warranties, including lifetime material coverage and up to 25-year workmanship protection for qualifying installations.

GAF certification ensures rigorous training, adherence to quality standards, and access to premium materials with industry-leading warranties for superior protection.

We begin with a consultation, followed by material selection, tear-off of old systems, and certified installation. Disposal and cleanup are included in our comprehensive service.

We serve eastern Long Island, including Riverhead, Cutchogue, and Southampton, with expertise in local building codes and climate challenges.

Contact us directly to inquire about current financing programs for qualifying roofing projects and upgrades.

We cannot say enough about the service and quality of RW Mulligan. Luis is a hard-working, honest and dependable professional. Catie, is incredible in the office. All the workers were respectful and dedicated. We cannot stop talking about how great our experience was with this business! Look no further. Need a new roof? This is the business to go with!

Got to tell you how happy I was dealing with Mulligan. Thorough evaluation and estimate, professional suggestions and fast written estimates. The office staff was responsive to all my questions and worked with my schedule to have my new roof done at a time that was very helpful to me. Catie was super knowledgeable and helpful. The team arrived on schedule at the appropriate time and they work like a well practiced orchestra. Luis the owner was on the job supervising and answering any questions I had.

The installers were very efficient impeccably clean and amazingly professional. They exuded pride in their craft. And the job foreman was exceptionally knowledgeable. They completed the job in one day as promised including a complete protection of the house from any debris, protecting the windows from any possible damage, and a complete cleanup at the end of the job. Their estimate was competitive, the work was professional, and the materials and prep work we're done as promised. I couldn't be more satisfied, very happy that I chose Mulligan.

Needed a new roof on my house after 30 years and really was unsure what company to go with. Thrilled that I contacted R W Mulligan! The entire process was handled professionally. I set up appointment through Catie and Tom came out and walked me through what the job would entail. I got a detailed written estimate on every aspect of what was to be done. Good price. We scheduled appointment and the day of the job Luis, Damien and entire crew were terrific in getting the entire project done to perfection just as had been outlined in estimate. Don't hesitate!

Outstanding job and a very reasonable price. I'm glad I cancelled my appointments with company up west.

Can't speak for quality of the actual work or price as it wasn't my house. They showed up at my neighbor's at 7:30am right outside my bedroom window and started throwing large sheets of metal around. They set up the gutter brake in front of my house and put their garbage can and a couple tools in my garden ON TOP OF my plants. After they left I went out to check for damage and found numerous metal shards and shavings in my grass (where my daughter walks barefoot). I also picked up 3 metal screws along the side of the road in front of my house along with various bits of tar paper. Totally unprofessiona.

From the first call to request an estimate, to watching the trucks pull out of the driveway at the end of the job, the whole project was executed flawlessly. Even though RW Mulligan came highly recommended, we were truly impressed with how our house roof replacement was performed. Every member of the team was professional, friendly and excelled at what they do. I unreservedly recommend RW Mulligan, It was a pleasure doing business with them! Paul Savage Southold

We recently used the services of R W Mulligan for reroofing and gutter installation. The entire process was smooth and without any stress. Tom who did the estimate was friendly, answered all questions with no pressure to use their company. The written estimate was extremely detailed and cost was fair. The office staff through the process were just great. Gisela and Catie are friendly, upbeat, have a lot of patience and return emails and calls within hours.

The foreman Luise is polite, friendly and easy to work with. The workers were efficient and the job was completed in one day. As for the cleanup it was hard to tell they were even there. Found one stray nail on the deck but otherwise they left the property immaculate. the roof itself is beautiful. Great job done by all.