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Serving Key West, FL and surrounding areas. (645) 300-7168
Key West Insulation helps homeowners across the Florida Keys stop paying to cool the outdoors. We assess your home, recommend the right solution, and install it properly - with permits handled and no shortcuts taken.
Key West Insulation is a licensed insulation contractor serving Key West, FL and the surrounding Florida Keys. We offer 16 insulation and air sealing services built for the specific demands of coastal South Florida - where heat, humidity, and salt air require more than a one-size-fits-all approach. From historic Conch-style homes on small lots to commercial buildings along the Overseas Highway, our crews work across 12 communities in Monroe County.
High energy bills from your AC running nonstop? Spray foam seals air leaks and locks in cool air all year long.
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Heat pouring through your ceiling? Proper attic insulation keeps your living space cool even on the hottest Key West afternoons.
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Thin or missing attic coverage? Blown-in insulation fills every corner evenly and cuts cooling costs fast.
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Every part of your home loses cool air differently. We assess and insulate walls, attic, and crawl spaces as a complete system.
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Old, wet, or moldy insulation makes new material underperform. We remove it safely before installing a fresh, effective layer.
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An unsealed crawl space lets humid Florida air creep into your floors and walls. We insulate it to stop moisture at the source.
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Hollow wall cavities let heat push straight into your rooms. Wall insulation reduces heat gain and cuts your cooling load.
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Insulation alone can not stop air leaks. We seal gaps around pipes, wires, and framing so conditioned air stays where you put it.
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Uninsulated basements and under-floor areas are a major source of heat gain. We insulate them to improve comfort throughout your home.
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Need a strong moisture and air barrier for coastal conditions? Closed-cell foam bonds to the structure and resists humidity.
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Want effective insulation at a lower cost? Open-cell foam fills interior cavities and absorbs sound without breaking the budget.
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Running a business in the Keys? Commercial insulation keeps your space comfortable and your utility costs manageable.
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Ground moisture and humid air rising through your crawl space causes wood rot and mold. A vapor barrier stops it before it starts.
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Proper vapor barrier installation protects floors, framing, and walls from the moisture that coastal Florida climates produce daily.
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Hot air sneaks into living spaces through unsealed attic gaps. Attic air sealing stops it before insulation even needs to work.
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Own an older home that was never properly insulated? Retrofit insulation upgrades it without tearing down walls.
Learn MoreReach out by phone or online form and we'll ask a few quick questions about your home and what's been bothering you - high bills, hot rooms, or moisture concerns. We respond within 1 business day, and you don't need to know anything technical before this call. We'll figure out the rest together.
A technician visits your home to look at the attic, walls, and any crawl spaces. We check what's already there, identify air leaks and moisture issues, and assess the condition of existing insulation. In older Key West homes, this step matters more than anywhere else - we assess your specific situation before recommending anything. You'll receive a written estimate before any work begins.
We handle permits, show up prepared, and install the insulation correctly. Most jobs are completed in one to two days. Before we leave, we walk you through what was done so there are no questions. If a permit inspection is required, we coordinate it for you. You keep the documentation for your records.
We carry active contractor licensing and full liability insurance on every project we take. You get documentation you can hand to your insurer or a future buyer without hesitation.
We visit your home, assess what's actually there, and give you a written quote before any work begins. No pressure, no vague ranges over the phone, no surprises on the invoice.
We have been working on homes and commercial properties throughout Monroe County since 2017. We know older Conch-style construction, island logistics, and what actually holds up in this climate.
We pull the permits, coordinate the inspections, and give you the paperwork at the end. No shortcuts, no unpermitted work that comes back to hurt you at closing or after a storm.
Ready to get started? Call (645) 300-7168 or send us a message.
"I had been putting off insulation for years because I thought it would be a huge hassle. The crew finished the attic in one day, handled the permit themselves, and my electric bill dropped noticeably the following month. Worth every dollar."
Marcus T., Key West
Attic Insulation
"Our crawl space was a mess - damp, musty, and clearly not sealed. They came out, assessed it, and explained exactly what needed to happen before touching anything. The vapor barrier and insulation work was clean and they left the space in better shape than they found it."
Sandra R., Marathon
Crawl Space Insulation
"We have a 1920s Conch house and were nervous about finding someone who knew how to work in a tight old attic without cutting corners. The team took their time during the walkthrough and gave us a detailed quote. Spray foam was the right call - the house holds temperature like it never has before."
David and Lena F., Big Pine Key
Spray Foam Insulation
We respond within 1 business day. There is no commitment required to request an estimate. After you submit, someone from our office will call to schedule a free on-site assessment at a time that works for you.
(645) 300-7168Key West Insulation serves homeowners and businesses throughout Monroe County. In addition to Key West, we regularly work in Marathon, Big Pine Key, Cudjoe Key, and all surrounding communities along the Overseas Highway. We cover 12 service areas in total and can typically schedule an on-site estimate within the same week.
In most cases, the problem is not your air conditioner - it is heat pouring through an under-insulated attic or walls. Your roof can reach extreme temperatures in direct sun, and without proper insulation, that heat radiates straight down into your living space faster than any AC can remove it.
Insulation itself does not remove moisture, but it reduces the amount of warm, humid outdoor air that infiltrates your living space. Pair it with proper air sealing - closing gaps around pipes, wires, and framing - and your home will feel noticeably less sticky even on the most humid Key West days.
Closed-cell spray foam is generally the better choice for exterior-facing surfaces in Key West because it creates a moisture and air barrier in one application. Open-cell foam costs less and works well in interior walls. For attics and any surface exposed to salt air, closed-cell holds up significantly better over time.
Yes - especially in South Florida. An open or poorly sealed crawl space allows ground moisture and humid air to rise directly into your floors and wall cavities. Insulating and sealing the crawl space is one of the most overlooked ways to reduce humidity inside the home and prevent wood rot underneath it.
If existing insulation is wet, compressed, or shows signs of mold, adding new material on top of it will underperform from day one. Old insulation in Key West homes is particularly susceptible to moisture damage from decades of high humidity. A contractor should inspect what is there before recommending whether removal is necessary.
Florida has one of the most demanding residential energy codes in the country, and Monroe County enforces it. Any permitted insulation project must meet minimum R-value standards for your climate zone. The good news is that a licensed contractor handles all of this - you just need to make sure permits are being pulled. Learn more at the{" "} U.S. Department of Energy.
Key West Insulation is a licensed and insured insulation contractor based in Key West, FL, serving Monroe County and the surrounding Florida Keys since 2017. We hold active contractor licensing issued by the State of Florida and carry full liability insurance on every project we complete.
Since 2017, we have completed insulation and air sealing projects across all 16 service types we offer - from spray foam and attic insulation to vapor barriers and commercial work. Our crews specialize in the older wood-frame and Conch-style homes that make up a large share of Key West's housing stock.
Want to learn more about our team and how we work? Visit our About page.
If your home is more than 20 years old and has never had insulation work done, now is the right time. If your electric bills have climbed without explanation, or certain rooms are never comfortable, those are clear signals. The longer you wait, the more you pay every month.
Adding insulation without sealing air gaps first is like wrapping yourself in a blanket with holes in it - heat still gets through. Contractors who skip this step produce jobs that underperform from day one. Always confirm your contractor includes air sealing as part of the scope.
Ask to see depth markers in the attic - these small plastic stakes show the insulation coverage level at a glance. For spray foam jobs, the coverage should be even with no thin patches or bare spots. A good contractor welcomes these questions and will walk you through the completed work.
For official guidance on insulation R-values and energy efficiency standards, the ENERGY STAR Seal and Insulate program is a reliable starting point. Ready to take the next step? Call (645) 300-7168 or request a free estimate online.
Key West covers just about 5 square miles at the southern tip of Florida and is home to roughly 25,000 permanent residents. The city is packed with older homes - many of them wood-frame Conch-style structures built in the late 1800s and early 1900s - on small lots with little yard space. Because the island has almost no room for new construction, most of the housing stock is aging and in constant need of maintenance in a climate that is hard on buildings. The city's historic character is part of what makes it special - and part of why insulation work here requires a contractor who understands older construction.
A large portion of Key West - especially the western end of the island - falls within the Old Town Historic District, where exterior changes require review before work begins. Landmarks like the Ernest Hemingway Home on Whitehead Street and the waterfront at Mallory Square are just blocks from residential properties that regularly need insulation, moisture control, and air sealing work. Many homes near Duval Street and throughout the historic district are over 100 years old and were built before modern insulation standards existed.
Key West also sits in one of the most hurricane-exposed locations in the continental United States, and many homes are built on concrete piers or wood stilts to meet flood zone requirements. Year-round heat, high humidity, salt air corrosion, and the risk of heavy tropical rain make insulation and moisture control a practical necessity - not just a comfort upgrade. Whether your home is a classic Conch cottage a few blocks from Mallory Square or a newer elevated structure on the east end of the island, Key West Insulation has worked on properties just like yours throughout Monroe County.
By appointment only, no walk-ins.
Key West Insulation
1719 Johnson StAlways open, 24/7.
Call today or request a free estimate online - our team covers all of Key West and the surrounding Florida Keys.