Choose the Commercial Roof by the Building, Exposure and Business Plan.
Commercial roofing is not one material category. The correct assembly depends on geometry, deck, drainage, moisture, insulation, wind pressures, equipment, traffic, chemical exposure, phasing, warranty objectives and the owner’s capital plan.
The 8th Edition (2023) is current. The 9th Edition (2026) is in Florida’s 2026 adoption process; verify the effective date before permitting. Verify the code, supplements, product approval/NOA and limits of use for the actual permit.
A commercial roof is an assembly plus an operating environment.
The visible roof material has to work with the structure beneath it and the business below it. That is why system selection begins with the building—not a manufacturer brochure.
Define these before comparing bids.
- Roof geometry, slope and controlled drainage
- Deck type, condition and attachment capacity
- Existing layers, moisture and insulation strategy
- Design pressures and roof-zone requirements
- Equipment, penetrations, traffic and chemical/exhaust exposure
- Occupied-space, phasing and operational constraints
- Repair, restoration, recover or replacement objective
- Warranty, ownership horizon and capital-plan priorities
One parent hub. Detailed authority pages underneath it.
The parent page explains how to choose. Each child page owns deeper product-family design, repairability, manufacturer and proposal questions.
TPO
Heat-welded seams, reflective options and project-specific attachment.
Open Authority →PVC / KEE
Chemical/exhaust exposure can change membrane selection and detailing.
Open Authority →Modified Bitumen
SBS or APP pathways with multi-ply detailing and repairability considerations.
Open Authority →Built-Up Roofing
Redundant plies, surfacing and hybrid options for appropriate commercial assemblies.
Open Authority →EPDM
Rubber membrane family with system-specific seams, attachment and flashing methods.
Open Authority →SPF
Monolithic insulation/weathering strategy requiring substrate, coating and drainage discipline.
Open Authority →Coatings / Restoration
Acrylic, silicone and reinforced liquid systems only when the existing roof qualifies.
Open Authority →Commercial Metal
Standing seam, exposed-fastener and structural metal assemblies with movement and corrosion planning.
Open Authority →Commercial Tile
Concrete or clay tile coordinated with underlayment, attachment, structure and access.
Open Authority →Commercial Shingle
Architectural shingle assemblies for qualifying multifamily and commercial properties.
Open Authority →Roof Decks & Attachment
Steel, concrete, wood and specialty deck conditions can control the roof assembly.
Open Authority →Flat / Low-Slope Authority
Drainage, moisture, insulation, deck and system-family comparison for low-slope roofs.
Open Authority →The roof covering is only one layer.
A commercial proposal should explain how the load path, thermal layers and water-control details connect.
Repair, restore, recover or replace are different strategies.
The lowest initial scope can become the most expensive path when the existing assembly cannot support it. Conversely, replacing a serviceable roof can destroy capital unnecessarily.
Repair
Target defined defects when the surrounding system remains serviceable and the repair can be made compatibly.
Repair pathway →Restore
Evaluate coatings or reinforced restoration only after moisture, adhesion, drainage, flashings and substrate are reviewed.
Restoration pathway →Recover
Consider a new assembly over an existing roof only when layers, moisture, structure, fire, attachment and manufacturer rules support it.
Recover pathway →Replace
Use replacement when condition, moisture, attachment, drainage or long-term economics no longer support narrower scopes.
Replacement pathway →Drainage, equipment and edge details drive real-world performance.
Identify the next technical decision—not a generic material recommendation.
Seven inputs route the property toward the most responsible next authority or service page.
Compare the assembly—not just the manufacturer name.
Two proposals can name the same brand and still describe materially different roofs.
| Scope item | Proposal should define | Why it matters |
|---|---|---|
| Existing roof | Layers, tear-off/recover assumptions, moisture investigation | Changes eligibility, hidden risk and cost |
| Deck | Type, condition, repair allowance and fastening basis | Controls attachment and concealed conditions |
| Insulation | Type, thickness, R-value, taper and fastening | Controls thermal performance, drainage and assembly |
| Cover board | Product, thickness and attachment when used | Affects durability, fire/testing and substrate |
| Field roof | Exact membrane/product line, thickness or ply count | Same manufacturer can have multiple systems |
| Wind zones | Field, perimeter and corner attachment requirements | Design pressures are not uniform across the roof |
| Details | Drains, scuppers, curbs, walls, penetrations, edges | Most leaks occur at transitions and details |
| Warranty | Issuer, term, coverage, inspections and exclusions | Manufacturer, finish and workmanship warranties differ |
| Operations | Phasing, access, tenant communication, equipment coordination | Commercial execution can affect occupied operations |
| Closeout | Permits, inspections, photos, warranty docs and maintenance plan | Documentation supports future ownership decisions |
Commercial roof-system questions that should be answered before procurement.
What is a commercial roof system?
A commercial roof system is the complete weatherproofing and load-transfer assembly above the building structure. The membrane, panels, tile or shingles are only the visible layer; deck, insulation, cover board, attachment, flashings, drainage, perimeters, penetrations and project-specific approvals work together.
Are all commercial roofs flat?
No. Many warehouses, retail buildings and offices use low-slope systems, but commercial, condominium and multifamily properties can also use metal, tile and shingle roofs. Geometry, structure, drainage and use should be identified before the system is selected.
Is TPO automatically the best commercial roof?
No. TPO can be a strong option for many low-slope buildings, but PVC or KEE, modified bitumen, built-up roofing, EPDM, SPF, coatings, metal and other assemblies can be more appropriate depending on exposure, deck, drainage, traffic, equipment, warranty and ownership goals.
What is the difference between repair, restoration, recover and replacement?
Repair corrects defined defects. Restoration uses a compatible surface or reinforced liquid-applied system when the existing roof is a suitable candidate. Recover installs an eligible new roof assembly over an existing roof under code, moisture, load, fire and manufacturer constraints. Replacement removes or replaces the existing system to the extent required by the final design.
Why does the roof deck matter?
The deck or structural support is where roof loads and attachment are resolved. Steel deck, concrete, wood, gypsum, cementitious wood fiber and other substrates can change fasteners, attachment patterns, insulation, fire classification, repairability and engineering requirements.
Why is moisture investigation important before a commercial reroof?
Moisture trapped in insulation or beneath an existing membrane can reduce thermal performance, damage materials and make some recover or restoration strategies inappropriate. Investigation can include records, probes, core cuts and non-destructive moisture screening when justified.
How are commercial roof fastening patterns determined in South Florida?
Fastening is not chosen from a generic rule of thumb. The final pattern depends on project design pressures, roof zones, deck and substrate, the exact tested or approved assembly, fastener and plate capacity, insulation configuration, edge conditions and engineering where required.
Does an approved product mean it can be installed any way the contractor wants?
No. Florida Product Approvals and Miami-Dade Notices of Acceptance include specific assemblies, substrates, attachment limits and other conditions. The exact current approval and manufacturer requirements should be checked against the project before permitting and installation.
Can a commercial roof be replaced while the building stays occupied?
Often yes, but the plan must address access, staging, noise, odors, debris, rooftop equipment, tenant or resident communication, temporary protection, phasing and safety. Some buildings or scopes require additional operational controls.
Do roof coatings work on every old commercial roof?
No. Coatings are a restoration strategy, not a universal substitute for replacement. The existing roof must be evaluated for moisture, adhesion, drainage, structural condition, attachment, contamination, flashing and manufacturer compatibility.
What should be compared when two commercial roof proposals use the same manufacturer?
Compare the exact membrane or product line, thickness, insulation and R-value, cover board, attachment, perimeter zones, flashings, drains, penetrations, accessories, warranty pathway, tear-off or recover assumptions, moisture work, deck repairs, exclusions and closeout requirements.
Does a new commercial roof guarantee an insurance discount?
No. Roofing work can affect underwriting or mitigation documentation, but insurers determine eligibility, premiums and credits. Code compliance, roof condition, mitigation reporting and insurance underwriting are related but separate processes.
Which Florida Building Code edition applies in August 2026?
The Florida Building Commission lists the 8th Edition (2023) as the current code, effective December 31, 2023. The 9th Edition (2026) is in Florida’s 2026 adoption process; verify the effective date and adopted edition before permitting. Project permitting must use the code and supplements applicable when the permit is processed.
Where does Aastro evaluate commercial roof systems?
Aastro Roofing Company serves commercial, multifamily, condominium, HOA, retail, industrial and other qualifying properties throughout Palm Beach and Broward Counties, subject to project scope, access, scheduling and final intake review.
Define the roof, the risk and the operating constraints before selecting the system.
Use the navigator for education, open a child authority page, or move into inspection, repair or replacement planning.