Crawl Space Encapsulation in Key West, Florida
19 crawl space companies serve Key West, Florida, with 598 customer reviews between them. Most full-service crawl space contractors handle encapsulation even when it isn't listed separately — confirm scope when comparing quotes. Local encapsulation typically runs $3,000–$8,000.
Get sealed crawl space quotes from Key West contractors who specialize in vapor barriers, vent sealing, and dehumidification. For broader services, see all crawl space repair contractors in Key West.
Key West Encapsulation Cost — Southeast — High Humidity
Average summer crawl space humidity: 75–95%. Primary driver: persistent humidity, mold pressure, termite activity.
Cost varies with crawl space sq ft, vapor barrier mil thickness, dehumidifier sizing, and wall insulation. Get 2–3 quotes for an exact number.
Why Encapsulation Matters in Key West
In the Southeast, vented crawl spaces draw in hot, humid summer air that condenses on cooler surfaces and feeds mold within 24–48 hours. Encapsulation is no longer "optional" here — most Southeast building codes now allow or require sealed crawl spaces. The combination of a sealed vapor barrier, vent caps, and a dedicated dehumidifier is the standard remediation.
What a Key West Encapsulation System Should Include
- ✓12–20 mil reinforced vapor barrier on floor and 6–12 inches up walls
- ✓Mechanical vent sealing on all foundation vents
- ✓R-10 to R-13 wall insulation (rigid foam)
- ✓Crawl space-rated dehumidifier (70–95 pints/day depending on sq ft)
- ✓Antimicrobial pre-treatment if any visible mold
- ✓Pest exclusion at sill plate and penetrations
What to Watch For in Florida
- !Avoid contractors who use thin (6-mil) plastic — it is not a long-term vapor barrier
- !Reject quotes that omit a dehumidifier — vent sealing without dehumidification can trap moisture
- !Confirm the warranty is transferable to the next homeowner (resale value)
Encapsulation Contractors in Key West
Fleming St. Key West House Restoration And Mold Environmental Inspection, FL
800 Fleming St, Key West, FL 33040, USA
5 reviews
Drywall Water Damage Restoration
822 Caroline St, Key West, FL 33040, USA
2 reviews
Fairbank Key West House Restoration And Mold Cleaning Services, FL
3440 Duck Ave, Key West, FL 33040, USA
8 reviews
Goodley 2nd St. Key West House Restoration And Mold Removal Services, FL
6336 2nd St, Key West, FL 33040, USA
11 reviews
AAA American Restoration of the Florida Keys
147 Mohawk St, Tavernier, FL 33070, USA
21 reviews
Votum Construction LLC
711 Amelia St, Key West, FL 33040, USA
1 reviews
Underwater Resources Florida Keys
6801 Shrimp Rd, Key West, FL 33040, USA
67 reviews
Shore Up Foundation Repair
487 Industrial Park, Monticello, FL 32344, USA
361 reviews
Keys Top Construction Inc.
3706 N Roosevelt Blvd Ste 207, Key West, FL 33040, USA
21 reviews
CRH Dryer Vent & Air Duct Cleaning Services Inc Of FL ,
919 Southard St, Key West, FL 33040, USA
13 reviews
Gulfstream Restoration
235 Key Deer Blvd, Big Pine Key, FL 33043, USA
10 reviews
Barracuda Builders of Key West, Inc.
117 Overseas Hwy Unit C1, Key West, FL 33040, USA
11 reviews
All Keys Construction of the Florida Keys
1700 N Roosevelt Blvd Suite 3, Key West, FL 33040, USA
6 reviews
Bella Construction of Key West
35 Diamond Dr, Key West, FL 33040, USA
13 reviews
Znd-US Mold Removal & Mold Remediation Service Florida City, FL
873 SW 5th St, Florida City, FL 33034, USA
23 reviews
EE Builders LLC
1205 20th Terrace, Key West, FL 33040, USA
5 reviews
COC Dryer Vent & Air Duct Cleaning Services LLC Of FL ,
2301 Seidenberg Ave, Key West, FL 33040, USA
20 reviews
Bluebonnet Foundation Repair
623 Duval St #205, Key West, FL 33040, USA
0 reviews
Octopus Builders
1107 Key Plaza #145, Key West, FL 33040, USA
0 reviews
Encapsulation FAQs — Key West, Florida
Which companies offer crawl space encapsulation in Key West?
Fleming St. Key West House Restoration And Mold Environmental Inspection, FL (5.0★), Drywall Water Damage Restoration (5.0★), Fairbank Key West House Restoration And Mold Cleaning Services, FL (5.0★) are the top-rated crawl space companies in Key West, and most full-service contractors handle encapsulation — ask for it specifically when requesting quotes.
How many crawl space contractors serve Key West?
19 crawl space companies are listed for Key West; Shore Up Foundation Repair is the highest-rated at 5.0★ (361 reviews). Pros in nearby Hialeah and Pembroke Pines also cover the area.
How much does crawl space encapsulation cost in Key West, Florida?
Crawl space encapsulation in Key West, Florida typically costs $3,000–$8,000 for a complete system. Pricing depends on crawl space size, vapor barrier mil thickness (12-mil to 20-mil), whether a dehumidifier is included, and wall insulation specs. Southeast — High Humidity pricing reflects local labor rates and climate-driven scope.
What vapor barrier thickness is best for Key West?
20-mil reinforced is recommended in this climate. Cheaper 6-mil or 10-mil sheeting will tear and degrade within 3–5 years under Southeast humidity.
Do I need a dehumidifier with encapsulation in Key West?
A dedicated crawl space dehumidifier sized for 90+ pints/day is standard for 1,500–2,500 sq ft homes. Maintain humidity below 55% year-round — this is non-negotiable in the Southeast.
How long does crawl space encapsulation last?
A professional encapsulation system in Key West lasts 15–25 years. The vapor barrier itself (especially 20-mil reinforced products) can last 25+ years. Dehumidifiers should be serviced annually and replaced every 8–12 years. Most contractors offer transferable warranties of 10–25 years on the vapor barrier and 5–7 years on the dehumidifier.
When is the best time of year to encapsulate a crawl space in Key West?
Schedule between November and March. Crawl space humidity is lowest, contractors are less booked, and you avoid the May–September peak when most encapsulations get installed reactively after mold discovery.
Expected ROI
Energy savings: 8–18% of total home heating/cooling. Resale value: most appraisers add $5K–$15K for a fully encapsulated, transferable-warranty system. Many buyers in the Southeast now expect encapsulation in homes with crawl spaces.
Best Season to Schedule
Schedule between November and March. Crawl space humidity is lowest, contractors are less booked, and you avoid the May–September peak when most encapsulations get installed reactively after mold discovery.
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Southeast — High Humidity
Average summer crawl space humidity: 75–95%.