Commercial Reroofing

Commercial Re-Roofing for commercial buildings across Miami.

Most commercial roof replacements in Miami-Dade get scoped reactively. The roof leaks after a king-tide event, or a tropical storm exposes failed perimeter flashings, and someone calls three contractors for bids. The lowest bid wins, the new membrane goes on the same insulation against the same parapet detailing — and then leaks again in two years. We do not work that way.

Our replacement scope starts with a roof walk and a moisture-core pull on any roof we suspect has saturated insulation from chronic water intrusion. We document deck condition, parapet flashing condition, drain status, every penetration, and every prior repair. The replacement scope then specifies the membrane (with its Miami-Dade Notice of Acceptance number), the insulation stack compliant with Florida Energy Code R-value requirements, the fastener density to FBC HVHZ wind-uplift design, the manufacturer warranty path, and the maintenance contract that keeps the warranty active.

Miami-Dade's product approval system matters in ways it does not in most other markets. If a roof assembly — membrane, insulation, fastener pattern, and adhesive system — does not have an active Miami-Dade NOA for the complete assembly as installed, the system is not code-compliant regardless of how well the individual components perform. We specify only assembly systems with current NOA approvals, and we document the approval numbers at closeout.

When Replacement Is the Right Call in South Florida

Recover-versus-replace is the first decision in any aging-roof scope. We pull moisture cores in five to ten representative locations on roofs we suspect have insulation saturation. If more than 25% of cores read wet, replacement is the honest scope — recovering wet insulation traps moisture, creates a perfect mold environment in Miami's humidity, and voids the new manufacturer warranty. If under 25%, a recover with targeted insulation replacement at wet areas can extend the asset another 15 to 20 years at roughly half the capital cost of full replacement.

Deck condition is the second decision. Corroded metal deck or rotted wood sheathing drives the project into a different cost band. In Miami's coastal humidity environment, deck corrosion on older pre-1992 buildings is more common than owners expect — especially on roofs that have had chronic water intrusion. We pull deck inspection ports under wet cores and at visible deflection points before the replacement scope is finalized.

FBC HVHZ compliance is the third decision. Any roofing system installed in Miami-Dade must comply with the Florida Building Code's High-Velocity Hurricane Zone requirements. The key variables are the fastener density in field, perimeter, and corner zones — the three zones that carry progressively higher wind-uplift design pressures per ASCE 7 and the FBC. Buildings close to Biscayne Bay or with open-exposure roof edges require more conservative perimeter fastening than inland buildings sheltered by adjacent structures.

What the Replacement Scope Specifies

Membrane and NOA: TPO 60-mil or 80-mil for most Miami commercial buildings — every manufacturer's TPO system we specify carries an active Miami-Dade NOA for the complete assembly. EPDM 60-mil for buildings with high mechanical traffic or specific owner preference. PVC 50-mil or 60-mil for restaurants and high-chemical exposure. Modified bitumen for buildings where the recover path makes cost sense and a compliant NOA-approved assembly exists. We do not install any assembly that lacks a current Miami-Dade product approval.

Insulation: We spec to Florida Energy Code minimum R-25 for low-slope commercial, often higher depending on building use and utility cost analysis. The stack typically runs polyiso primary insulation with a cover board — HD polyiso, gypsum board, or high-density polyiso depending on membrane manufacturer's installation requirements. Tapered insulation packages are designed against the existing drain layout and documented ponding patterns.

Fastener pattern: Designed against FBC HVHZ wind-uplift requirements using the ASCE 7 design pressure for the specific building, zone (field, perimeter, corner), and exposure category. Biscayne Bay waterfront buildings and rooftop edges with open exposure get the most conservative pattern. All fastener patterns are submitted as part of the Miami-Dade permit application.

Manufacturer warranty: 20-year NDL (no-dollar-limit) warranty is standard for most TPO and EPDM systems. PVC can carry 25-year warranties. The warranty path requires documented annual maintenance — we build that into every replacement closeout.

How We Sequence the Project

Pre-construction: Permits filed with Miami-Dade Building Department (or the relevant municipal building department for Coral Gables, Miami Beach, or other incorporated municipalities), pre-job meeting with the building's facility manager to set crane placement and material lay-down zones, tenant notification distributed, parking and ingress/egress plan documented. Miami-Dade's building department permitting timelines run 3 to 6 weeks for commercial roofing permits — we file early.

Production: Tear-off staged in 5,000 to 10,000 sq ft sections with same-day dry-in on each section, so the building is never exposed overnight. Miami's afternoon thunderstorm pattern from June through October means production work starts at 6 AM and dry-in is complete by 1 PM. Hurricane season (June 1 through November 30) requires heightened daily weather monitoring — we maintain emergency tarping materials on every active project during hurricane season.

Closeout: Punch walk with the building's facility manager and our project manager, manufacturer warranty inspection with the manufacturer's field representative, Miami-Dade final inspection and certificate of completion, closeout package delivered — warranty document, NOA approval documentation, photo-keyed zone diagram, maintenance contract.

Frequently asked questions

What is a Miami-Dade NOA and why does it matter for my roof replacement?

NOA stands for Notice of Acceptance — Miami-Dade County's product approval process for building materials used in the High-Velocity Hurricane Zone. Every roofing assembly installed in Miami-Dade must have an active NOA that covers the complete system as installed: membrane, insulation type, attachment method, and adhesive or fastener system. If a contractor installs a system without a current NOA — even if the individual components are high quality — the installation is not code-compliant and will fail Miami-Dade final inspection. We specify only NOA-approved assembly systems and document the approval numbers in the permit application and closeout package.

How long does a Miami commercial roof replacement take?

For a 50,000 sq ft single-story commercial building with no deck replacement and no major structural issues: approximately 3 to 4 weeks of production from tear-off through closeout, assuming no hurricane weather delays. Add 3 to 6 weeks for Miami-Dade permitting before production starts. During hurricane season we build weather contingency into every production schedule.

Will my building be exposed to rain during the replacement?

No. We tear off only what we can dry-in the same day. During Miami's summer rainy season (June through September), we structure production phases to reach same-day dry-in before the typical 2 to 3 PM afternoon thunderstorm window. Each section gets a temporary dry-in — single-ply membrane lap with mechanical fasteners — before the crew leaves for the day. We do not leave the building's interior exposed overnight.

Do you work on buildings in Coral Gables, Miami Beach, and other incorporated cities?

Yes. Coral Gables, Miami Beach, Hialeah, Doral, Opa-locka, and other incorporated municipalities each have their own building departments and permit processes, but all still operate under Miami-Dade's HVHZ requirements and product approval system. Our project managers are familiar with each municipality's specific permitting requirements and inspection schedules.

Get a written replacement scope for your Miami building.

Our project managers will walk the roof, pull moisture cores if the recover-vs-replace decision depends on them, and deliver a written scope detailed enough to bid against — with NOA numbers and wind-uplift design included.

Commercial Re-Roofing in Miami, FL begins with a structural load check. Before any tear-off is priced, the building's roof deck capacity must be verified against the weight of the proposed new assembly — new insulation, cover board, membrane, ballast if applicable, and any required drainage improvements. For commercial re-roofing in Miami, the code also controls how many membrane layers can remain on the deck: most jurisdictions follow the two-layer maximum specified in the International Building Code, which means full tear-off may be required even when the top membrane looks serviceable.

Insulation is the largest cost driver in commercial re-roofing after tear-off labor. Energy codes in FL — whether Title 24, ASHRAE 90.1, or a local supplement — set minimum R-value targets for roof assemblies above conditioned space. A commercial re-roofing project that does not meet the current energy code may require additional insulation thickness to obtain a permit, which changes the scope, the deck load, and the tapered insulation design around drains. Commercial Roofing works through those calculations before presenting a commercial re-roofing budget so the number in the estimate reflects the actual permitted scope.

Permit documentation for commercial re-roofing in Miami typically requires product data sheets, a roof plan or sketch showing drainage and slopes, a disposal plan for tear-off material, and sometimes a structural engineer review letter when the new assembly is heavier than the existing one. We assemble that documentation package and coordinate with the building department on the inspection schedule so the commercial re-roofing project closes without a certificate-of-occupancy hold.

Warranty implications matter for commercial re-roofing decisions. A roof manufacturer will not extend a new system warranty over a tear-off site with an unaddressed deck repair or compromised substrate. We document deck conditions found during tear-off, provide photographic evidence of substrate quality, and give ownership the information needed to decide whether manufacturer warranty coverage is worth the additional substrate repair cost. Call or email to schedule a commercial re-roofing assessment in Miami.

Questions Owners Ask

Widespread wet insulation, a second membrane layer already present, deck deterioration, repeated failed repairs, and energy code compliance gaps on a permit-requiring scope all push toward full re-roofing.

ASHRAE 90.1 or state-specific energy codes set minimum insulation R-values that may require added insulation thickness beyond what the existing assembly provides, increasing both cost and structural load.

Product data sheets, a roof plan or sketch, a disposal plan, sometimes a structural engineer review, and contractor licensing documentation. We assemble the permit package and coordinate the inspection schedule.

Membrane layer count, deck condition found during inspection, moisture scan results, and the code-required maximum layer count all determine whether full tear-off or partial removal is required.

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