When to Replace Building Caulking & Sealants
Professional planning, suitable materials, and licensed coordination for South Florida properties.
Waterproofing • Fort Lauderdale, FL
Caulking & Sealant Replacement in Fort Lauderdale
Failed caulking is the #1 source of building leaks in South Florida. We replace sealants at windows, joints, penetrations, and seams with products engineered for the specific exposure.
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Sealant Replacement That Actually Stops Leaks
Caulking and sealant replacement in Fort Lauderdale is one of the highest-return waterproofing maintenance services available — and one of the most frequently deferred until water infiltration has already done significant damage. Every window frame, door frame, expansion joint, penetration, and transition detail on a building's exterior is sealed against water entry with caulk or sealant — and South Florida's UV radiation, thermal cycling, and hurricane-force rain are extraordinarily effective at aging and failing these materials. At Planet Construction FL, we replace building sealants systematically, closing every water entry point before the next storm season.
Failed Sealants Are Where Most Leaks Begin
The Planet Construction Approach
Caulking and sealants have a finite lifespan — and in Florida's UV and humidity, that lifespan is shorter than most people realize. Once sealant cracks, dries out, or pulls away from the substrate, water has a direct path into the building. Most leak investigations end at a failed sealant joint, but most building maintenance plans skip sealant replacement until the damage is already done.
Sealant Replacement With the Right Product for Every Joint
Service Details
What You Should Know
Types of Sealants — Matching Material to Application
Professional planning, suitable materials, and licensed coordination for South Florida properties.
Window & Door Perimeter Caulking
Professional planning, suitable materials, and licensed coordination for South Florida properties.
Building Exterior Sealant Programs
Professional planning, suitable materials, and licensed coordination for South Florida properties.
Common Questions
Frequently Asked Questions
Call us for project-specific information and a free consultation.
Call (754) 301-6747How long does building caulk last in Fort Lauderdale?
South Florida's UV intensity and thermal cycling shorten sealant service life compared to other climates. Quality polyurethane sealants at window and door perimeters last 7–12 years in Fort Lauderdale conditions. Expansion joint sealants under vehicle traffic loading last 5–8 years. Silicone sealants on UV-exposed south facades last 15–20 years due to silicone's inherent UV stability. Annual inspection of all exterior caulk and sealant joints is the best maintenance practice — catching failures before they allow significant water infiltration.
Can caulking be applied over existing caulk?
No — applying new caulk over old, failing caulk is not an effective repair. Old sealant must be fully removed to allow the new sealant to bond directly to the substrate on both joint faces. Bonding new sealant to old sealant produces a layered assembly that fails at the old sealant-to-substrate interface, typically sooner than the original installation. Complete removal is non-negotiable for a lasting sealant repair.
What is the difference between caulk and sealant?
In common usage, caulk and sealant are used interchangeably, but technically a caulk is a lower-flexibility, often paintable material suitable for interior gaps and joints with minimal movement. A sealant is a higher-performance product with greater elongation, UV stability, and adhesion designed for exterior joints subject to thermal movement and weather exposure. For building exteriors in Fort Lauderdale, sealant-grade products are always the correct specification — caulk-grade products will fail prematurely in outdoor applications.
How do I know if a failed sealant is causing my building's water intrusion?
Water testing — applying water at specific joint locations while observing for infiltration inside — is the most direct method for confirming that a specific sealant joint is the source of water entry. Planet Construction FL performs water testing as part of leak investigation assessments, systematically identifying the entry points before specifying repairs. This approach prevents the common mistake of replacing sealant at visible joints while missing the actual entry point, which may be at an adjacent penetration or flashing detail.
Get Your Sealant Inspection & Estimate
Free sealant inspection. We'll identify failed joints, scope the replacement, and quote it honestly.