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Chimney & Fireplace System Installations

At Guaranteed Chimney Service, we love helping homeowners add and maintain a brand new heating appliance that will provide years of enjoyment, ambiance, and warmth. Whether you’re looking for a completely new fireplace, prefab chimney, or a protective cap, we install it all! Just give us a call and tell us what you need!

You Name It, Guaranteed Chimney Service Builds And Installs It

We pride ourselves on being the place our customers can turn to for any and all chimney needs, from regular maintenance and service, to repairs and installations. Whether you’re looking at new parts or new appliances, let us help you find the right item, and install it properly.

We love seeing our customers take their first look at the brand new masonry fireplace that we’ve built in their home. Whether you prefer a traditional-looking brick fireplace or something more bold and modern, our technicians can breathe life into your vision. With our knowledge, experience, eye for design, and attention to detail, you’ll have a beautiful, safe and highly efficient appliance.

Chimney Caps
A chimney cap provides protection to your flue, blocking off a flue opening that would otherwise be an open void at the top of your home. Chimney caps work to keep out water, animals, and debris, so if your chimney cap is missing or damaged, let us install a new one that will keep your chimney protected and looking great!

Energy-Top Damper
If your old throat damper is stuck or damaged, or if you’re looking to make your home more energy-efficient, an energy-top damper can be a great item to invest in. These dampers seal off the top of a flue to minimize the transfer of conditioned air and block off the intrusion of water. They’re a great improvement from throat dampers, and we highly recommend them.

Pre-fabricated Chimney Installation


Guaranteed Chimney Service technicians regularly build masonry chimneys, but we also install factory-built chimneys, which are designed and tested for safety and efficiency. Plus, we build custom chases to enhance the looks of your pre-fab chimney and protect it from the elements.

Refractory Fireplace Installation
Refractory fireplaces offer benefits of both masonry and pre-fabricated fireplaces — they’re made of highly-durable masonry material (like volcanic pumice stone), but are factory-built as modular units that make for fast and efficient installation. Our technicians can tell you all about the benefits of these units, so you can decide whether a refractory fireplace is right for your home!

Whatever your fireplace or chimney needs, call Guaranteed Chimney Service at 631-288-9009– our experienced technicians would love to help!


Professional chimney sweeping is one of the most basic and common services we perform. We would love to take care of this important chimney service for you today, so give us a call.



Certifications/ Associations

Why Choose Guaranteed?

  • Expertise - This is what we do! We focus 100% of our business on all things chimney related. You could even say we are "chimney geeks".
  • Safety, Safety, Safety! - Your safety is our number one priority. We take no shortcuts. We're your neighbors! The owner and crew live, work and play in Eastern Long Island.
  • CSIA Certified Technicians - You get the guys who know right from wrong. Our technicians have been educated, tested and certified by the Chimney Safety Institute of America. There's more to a simple chimney sweep than meets the eye. An educated technician can spot a potential problem and recommend the correct repair - not just sell you something you don't need.
  • Reliable - we keep our appointments. We know your time is valuable. When you schedule an appointment with us, we show up! If unavoidable changes happen, we'll call you.

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