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Serving Key West, FL and surrounding areas. (645) 300-7168
Key West's heat, humidity, and salt air demand the toughest insulation available. Closed-cell foam seals your home tight, blocks moisture, and keeps your AC from running constantly - all in one installation.
Closed-cell foam insulation in Key West is sprayed as a liquid that expands into a firm, dense layer - sealing air gaps and blocking moisture at the same time - with most residential attic and crawl space jobs completed in one to two days.
Unlike fiberglass batts or blown-in insulation, closed-cell foam hardens into a solid barrier that doesn't sag, absorb moisture, or leave gaps over time. In Key West, where outdoor humidity stays above 70 percent for most of the year and salt air works its way into every opening it can find, that combination of air sealing and moisture resistance in a single material is hard to match. Many homeowners find their home finally reaches a consistent temperature room to room after installation - because the gaps that were letting the heat and humidity in are simply gone.
Closed-cell foam is one of the top upgrades we pair with our spray foam insulation work, and it's also a natural companion to open-cell foam insulation in situations where different parts of the home call for different approaches.
If your FPL bill has been creeping up month after month but you haven't added new appliances or changed how you use your AC, your home's insulation may be the problem. In Key West's heat, an air conditioner working against a poorly sealed home runs almost constantly - and that shows up fast on your bill.
If one part of your home always feels warmer or stuffier than the rest, hot outdoor air is likely getting in through gaps in the walls or ceiling in that area. In older wood-frame Conch-style homes, those gaps can develop over decades as the structure shifts. Closed-cell foam fills them completely.
Key West's outdoor air is nearly always humid, but if you're noticing that sticky, heavy feeling inside even with the air conditioning on, moisture is getting in through walls or the ceiling. Over time, that moisture encourages mold growth inside wall cavities. Closed-cell foam acts as a moisture barrier, addressing both problems at once.
Many Key West homes were built before modern insulation standards existed, and some have little to nothing in the walls or attic. If your home was built before the 1980s and you've never had an insulation inspection, there's a good chance it's working much harder than it needs to - and paying for it on your monthly energy bill.
We apply closed-cell foam in the areas where it delivers the most benefit for Key West homes: attics, crawl spaces, under floor assemblies, and wall cavities in older homes being upgraded. The material is sprayed in sections, expanding and hardening within seconds to form a continuous, gap-free layer. Because it bonds directly to the surface, it doesn't shift or settle over time the way loose-fill insulation can. For homeowners also dealing with open-cell foam insulation questions, we can walk you through which product suits which part of the home.
When closed-cell foam is applied under the roof deck - directly to the underside of the roof sheathing - it also adds structural rigidity that benefits a home in hurricane conditions. Monroe County enforces some of the strictest wind codes in the country, and this application is one reason coastal homeowners in the Florida Keys have increasingly chosen closed-cell foam as part of their overall storm preparedness. We also coordinate with our broader spray foam insulation services when a project calls for both types in different areas of the same home.
Best for homes where the attic is the primary source of heat gain and the homeowner wants maximum R-value in the least depth.
For homeowners who want to bring the attic inside the conditioned envelope, eliminating ductwork heat loss and adding structural resilience.
For elevated homes or pier-and-beam structures where ground moisture and heat rise are the main comfort and efficiency problems.
For older homes with little or no wall insulation where drilling and injecting foam improves the thermal envelope without a full renovation.
Key West sits at the southern tip of Florida where average humidity stays above 70 percent for most of the year and temperatures rarely drop even in winter. That constant heat and moisture load means insulation here has to work harder than almost anywhere else in the country. Closed-cell foam's ability to block both heat and moisture in a single dense layer makes it particularly well-suited to this climate. The salt air from the surrounding ocean accelerates damage to materials that aren't sealed properly - gaps in your home's envelope let that salty, humid air into wall cavities and attic spaces where it quietly damages wood framing and wiring over time. Sealing those gaps is as much about protecting your home's structure as it is about comfort.
Many of the older Conch-style homes we work on in Key Haven and Shark Key were built with wood-frame construction that wasn't designed with modern insulation in mind. Retrofitting closed-cell foam into these homes requires care around older framing and, for homes in the historic district, an understanding of what changes are and aren't allowed. We know how to work with these homes - respecting the structure while still delivering a real improvement in how they feel and how much they cost to cool every month.
When you reach out, we'll ask a few basic questions - the size of your home, what areas you want insulated, and what problems you're experiencing. You don't need technical knowledge ahead of time. We respond within one business day and schedule a site visit from there.
A contractor comes to your home to look at the areas you want insulated and assess what's currently there. In an older Key West home, this step matters a lot - construction style and any historic district considerations can affect the approach. You get a written estimate after this visit explaining exactly what we'd recommend and why.
Once you decide to move forward, we set an installation date. You'll need to clear the area being insulated and plan to be out of the home on installation day. We schedule early morning starts when possible to work ahead of Key West's peak afternoon heat.
The crew sprays foam in sections - it hardens within seconds. The process produces a noticeable smell, which is why you'll be out of the home during this time. Most jobs finish within one to two days. Your contractor will give you a specific re-entry time, typically a few hours after the crew finishes.
No obligation, no pressure - just a clear written estimate from a contractor who knows how Key West homes are built. We respond within one business day.
(645) 300-7168We work in Key West specifically - not just South Florida in general. Salt air, hurricane-code requirements, Conch-style construction, and historic district guidelines are factors we account for on every job. A contractor from inland Florida brings a different set of assumptions that don't always apply here.
We're licensed through the Florida DBPR and we pull the required permits before work begins on any job that requires one. Permitted work is independently inspected - that protects you, not just us.
We follow the installation standards established by the Spray Polyurethane Foam Alliance - the national industry body for spray foam contractors. That means proper thickness, even coverage, and no shortcuts on application technique.
If your home is in the Old Town Historic District, we'll tell you upfront which parts of the project, if any, need Historic Architectural Review Commission approval before we touch anything. We've worked on enough Key West homes to know where the lines are.
We walk every homeowner through the finished work before we leave - showing what was installed, where, and what to watch for going forward. For work inside attics or crawl spaces you can't easily access yourself, that walkthrough and documentation matters more than most people realize until they need it.
A softer, lower-density foam option that works well for interior walls and areas where maximum soundproofing is also a goal.
Learn MoreOur full spray foam service covering both open-cell and closed-cell applications across every area of your home.
Learn MoreSpots fill up fast as storm prep season approaches. Call today and we'll have a written estimate to you within one business day - no obligation, no sales pressure.