Flexible reinforced polyvinyl chloride sheet. Product families can use polyester or fiberglass reinforcement and may be mechanically attached, adhered, self-adhered or fleece-backed.
Aastro Roofing CompanyCommercial PVC & KEE roofing systems · Palm Beach and Broward Counties
Commercial PVC & KEE Roofing Systems
PVC and KEE membranes can be strong options for restaurants, industrial facilities, high-rise buildings, critical operations and other roofs with demanding chemical, grease, fire, traffic or service conditions—but the membrane must be selected as part of the complete approved roof assembly.
PVC and KEE explained separatelyChemical-exposure reviewHeat-welded seam qualityWind-zone attachment
PVC + KEEStandards and formulations distinguished
Chemical reviewGrease, oils, fuels and process exposure
Wind zonesField, perimeter and corner design
Featured systemsSOPREMA and FiberTite pathways
Florida CCC1330967Licensed and insured
Start with the product standard
PVC, KEE-modified PVC and KEE-primary membranes are not interchangeable labels
The proposal should identify the exact product, governing ASTM standard, reinforcement, thickness, backing and approved installation method.
Some PVC membranes use ketone ethylene ester to improve flexibility or performance yet remain evaluated as PVC under ASTM D4434. The product data sheet controls the terminology.
Membranes in which KEE is the primary polymer are evaluated under a separate standard. FiberTite is a major example of this high-performance KEE category.
A white roof is not automatically PVC. TPO, PVC, KEE, white EPDM, coatings and surfaced asphaltic roofs can look similar. Positive identification is required before welding, coating, recovery or tie-in work.
Authority contract
PVC or KEE is a membrane family. Performance still comes from the entire approved assembly.
This authority owns membrane identification, PVC-versus-KEE formulation, chemical/process exposure and PVC/KEE system selection. Deck qualification, wind design, recover eligibility, active-water diagnosis and complete replacement remain separate authorities.
Identify the Membrane
White does not mean PVC. Confirm product, standard, reinforcement, backing and repair/weld compatibility before tie-ins.
Define the Exposure
Grease, oils, fuels, solvents and process exhaust require product-specific review of concentration, temperature, duration and cleaning conditions.
Qualify the Deck
Deck, insulation, cover board, withdrawal resistance and roof-zone pressures control attachment. No generic fastener pattern is responsible.
Recover vs. Replace
Recover retains a qualified existing assembly. Broad moisture, failed attachment, incompatible materials or inadequate drainage can force corrective work or removal.
Specify the System
Only after the first four gates should the proposal lock membrane product, thickness, installation method, details, QA, warranty pathway and closeout.
Interactive system comparison
Six PVC and KEE system directions
No attachment method, reinforcement or formulation is universally best. Select a direction to see what changes.
Common commercial PVC direction
Polyester-reinforced PVC
Chemical and process exposure
The membrane should be selected around the actual rooftop exposure
“Chemical resistant” is not a blanket approval. The exact substance, concentration, temperature, duration, exhaust pattern and cleaning process matter.
Ordinary commercial use
Review the complete assembly, traffic and maintenance conditions. PVC may be appropriate, but chemical performance is not the only selection factor.
Required documentation: product or chemical name, concentration, temperature, frequency, exhaust location, spill history, cleaning chemicals, roof drainage path and manufacturer chemical-resistance guidance.
Membrane specification
Thickness and reinforcement should be compared together
A nominal membrane thickness does not reveal the complete durability, reinforcement or installation package.
| Specification item | What should be identified | Why it matters |
|---|---|---|
| Nominal thickness | 48-, 60-, 72-, 80-mil or exact product value | Influences total material thickness but does not independently define durability. |
| Thickness over scrim | Manufacturer-published top-film thickness | Helps compare the weathering layer above reinforcement. |
| Reinforcement | Polyester, fiberglass or product-specific reinforcement | Affects dimensional stability, strength, elongation and approved attachment. |
| Backing | Bare-backed, felt-backed, fleece-backed or self-adhered | Changes adhesion, substrate tolerance, application and recovery options. |
| Sheet width | Exact roll width used in each roof zone | Can affect seam count, fastening rows and wind-zone design. |
| Color and formulation | White, tan, gray or specialty product | Affects solar behavior, availability and product-specific approvals. |
Proposal rule: “60-mil white PVC” is incomplete unless the proposal also identifies the exact membrane, standard, reinforcement, backing, sheet width, attachment, insulation, cover board, flashings and warranty pathway.
Complete commercial roof assembly
The membrane is only one part of the roof
Performance depends on twelve coordinated layers and control points.
Identify the membrane, layers, moisture, attachment, previous repairs and warranty history.
Verify deck type, condition, corrosion, deterioration and fastener resistance.
Address interior humidity, air leakage, process loads and condensation risk.
Select compatible thermal layers and confirm thickness, facer and attachment.
Use tapered insulation, crickets, saddles and sumps where the approved design requires them.
Add a compatible protection and attachment layer when required by the assembly or building use.
Coordinate fasteners, plates, adhesives, induction welding or self-adhered technology by roof zone.
Specify exact product, standard, reinforcement, thickness, backing, color and sheet width.
Control welding temperature, speed, pressure, trial welds, probing and repairs.
Detail curbs, pipes, walls, drains, exhausts, skylights and rooftop trades.
Coordinate edge metal, coping, gutters, scuppers, drains and overflow provisions.
Document inspections, punch work, as-builts, warranty records and future repair materials.
Attachment and wind design
Field, perimeter and corner zones may require different assemblies
Calculated pressures, deck type, membrane reinforcement, sheet width and manufacturer approvals determine the attachment—not habit or one generic fastening pattern.
Fasteners and plates
Deck resistance, row spacing, plate spacing, sheet width and membrane reinforcement must match the approved assembly for each zone.
Adhesive and substrate
Adhesive type, coverage, substrate, drying, wind-zone enhancement and perimeter treatment must be specified.
Specialized attachment
Induction welding, self-adhered sheets or hybrid assemblies still require an approved deck-to-membrane load path.
Verified Aastro commercial low-slope project evidence. Images document field conditions; they do not identify one universal PVC assembly.
Heat-welded seam quality
Thermoplastic seams require controlled testing—not visual assumptions
Dependable PVC or KEE seams depend on clean, dry material and verified welding parameters.
Before welding
- Confirm membrane identity and compatibility.
- Remove dirt, moisture, oils and oxidation as required.
- Perform trial welds under current weather conditions.
- Set temperature, speed and pressure for the material.
Quality control
- Probe seams after cooling.
- Test hand-welded transitions and patches.
- Perform destructive testing when specified.
- Repair and reinspect failed areas.
Compatibility and separation
PVC should not be placed in direct contact with incompatible materials
Existing asphalt, coal tar, some insulation facers, residual adhesives and unknown membranes may require an approved separator, cover board, fleece backing or removal.
| Existing condition | Primary concern | Responsible next step |
|---|---|---|
| Asphalt or coal-tar roof | Plasticizer migration and direct-contact incompatibility | Verify layers and select an approved separation or recovery assembly. |
| Existing TPO | PVC and TPO cannot be heat welded into one continuous membrane | Identify tie-in method, separator, removal limits and warranty responsibility. |
| Unknown white membrane | Misidentification can cause failed repairs or incompatible coatings | Use records, manufacturer markings, field testing or laboratory identification. |
| Existing PVC or KEE | Aging, contamination and formulation can affect weldability | Perform cleaning and test welds before relying on a tie-in. |
| Existing coating | Unknown chemistry and adhesion | Identify coating, test adhesion and confirm manufacturer acceptance. |
| Wet insulation or failed attachment | Unsuitable substrate for recovery | Map moisture, replace failed materials and redesign attachment. |
Do not identify the membrane by color alone. A repair technician must know what material is present before using a hot-air welder, solvent, primer, adhesive or coating.
Moisture, air and vapor control
Critical facilities may require a hygrothermal review—not just a membrane choice
Cold storage, hospitals, laboratories, food processing, high interior humidity and sealed buildings can create condensation risks that must be evaluated through the complete roof and building enclosure.
Investigation inputs
- Interior temperature and humidity
- Air leakage and penetrations
- Deck temperature and type
- Existing vapor retarder
- Wet-insulation mapping
- Core cuts and deck condition
Design decisions
- Vapor-retarder location
- Insulation type and thickness
- Air sealing
- Attachment through the assembly
- Temporary dry-in
- Operational shutdowns
Verified Aastro project media: polyiso insulation installation in Fort Lauderdale.
Drainage and ponding water
A PVC membrane does not create roof slope
Ponding can result from blocked outlets, structural deflection, compressed insulation, inadequate tapered design or downstream drainage restrictions.
Primary drains
Confirm drain body, clamping ring, sump, strainer, leader and downstream capacity.
Scuppers and overflow
Coordinate primary and emergency drainage elevations, openings and discharge paths.
Tapered insulation
Use crickets, saddles, sumps and slope transitions from a coordinated drainage plan.
Structural deflection
Membrane replacement cannot correct a sagging deck or framing problem without structural work.
Verified Aastro project media: commercial roof-wall interface work in Hollywood.
Traffic, puncture and rooftop trades
Durability depends on how the roof is used after installation
HVAC technicians, kitchen exhaust service, window cleaning, solar work and other trades can create traffic and puncture risks.
- Use compatible cover boards and walkway systems where traffic is expected.
- Define access routes around equipment and roof hatches.
- Protect the membrane during construction and future service work.
- Coordinate curbs, supports, pipes and conduits before membrane installation.
- Require post-trade inspection and repair documentation.
Repair, recover or replace
Screen recovery candidacy before adding another roof assembly
The tool below organizes the first investigation. It does not provide engineering, code approval or manufacturer warranty authorization.
Manufacturer and credential hierarchy
Featured PVC and KEE pathways
A manufacturer name alone does not establish the exact membrane, assembly, authorization or warranty.
SOPREMA SENTINEL PVC and KEE
Featured commercial pathway for bare-backed, fleece-backed, PVC and KEE-enhanced thermoplastic systems. Exact product, attachment and warranty registration remain project-specific.
Review official SOPREMA system information
FiberTite KEE systems
Featured high-performance KEE-primary pathway for demanding chemical, puncture, weathering and operational environments. Public designation and warranty eligibility remain controlled by current Seaman Corporation records.
Review official FiberTite applicator informationCertainTeedCurrent public profile
Commercial contractor authority
CertainTeed commercial relationships are presented only where the current product and credential scope supports the project. No manufacturer credential is treated as a blanket PVC or KEE authorization; project-specific product and warranty eligibility still control.
See Credentials & LicensingSika Sarnafil and Sikaplan
Fiberglass-reinforced adhered PVC, polyester-reinforced mechanically attached PVC, felt-backed and self-adhered directions.
Carlisle and Versico
Sure-Flex and VersiFlex PVC/KEE product families with adhered, mechanically attached and fleece-backed options.
Johns Manville and Mule-Hide
PVC and fleece-backed commercial systems for applicable chemical, grease and service environments.
Approved Aastro project evidence
Commercial low-slope conditions that influence PVC and KEE design
These verified Aastro photographs document real commercial roof conditions. They do not claim that each photographed roof is a PVC installation.
Personalized commercial planner
Build the correct investigation path
Answer seven questions. The result is an educational routing recommendation—not engineering, a warranty decision or a final roof specification.
Your result will appear here.Complete all seven questions to receive a controlled next-step recommendation.Current primary technical resources · checked August 14, 2026
Use the current standard, product data and approved assembly—not a generic PVC rule.
These links are project-verification starting points. Exact product approval, attachment, chemical compatibility, warranty and permit requirements remain project-specific.
Current ASTM specification for reinforced poly(vinyl chloride) sheet roofing.
ASTM PVC standard →Current ASTM specification for KEE-primary reinforced sheet roofing.
ASTM KEE standard →Current FiberTite membrane resources identify KEE roof membranes and product-specific ASTM D6754 compliance.
FiberTite membrane resources →Current SENTINEL product families include reinforced PVC, fleece-backed PVC and KEE-formulated thermoplastic options.
SOPREMA PVC resources →Verify the exact roof-system approval, deck, insulation, attachment and limitations for the project.
Florida approval search →Where applicable, verify current NOA/system limitations and do not infer HVHZ eligibility from membrane brand alone.
Miami-Dade search →Florida code transition:the 8th Edition (2023) Florida Building Code remains the current statewide basis on this reference date; the 9th Edition (2026) is in Florida’s 2026 adoption process; verify the effective date and adopted edition before permitting. Reverify the adopted edition, local amendments, approval status and permit requirements at permit/project specification time for each project.
Direct answers
Commercial PVC and KEE roofing FAQs
What is a PVC commercial roof?
PVC is a reinforced thermoplastic membrane installed as part of a complete low-slope roof assembly. The installed roof also includes the deck, air or vapor control, insulation, attachment, flashings, drainage, perimeter and closeout requirements.
What is KEE roofing?
KEE means ketone ethylene ester. Some membranes use KEE as the primary polymer and are evaluated to ASTM D6754; other products are PVC membranes modified with KEE and remain evaluated to ASTM D4434. The exact product data must control.
Is every white membrane PVC?
No. White TPO, PVC, KEE, EPDM, coatings and surfaced asphaltic roofs can look similar from a distance. The membrane should be positively identified before repairs, welding, coatings or recovery work.
Why is PVC often considered for restaurants?
PVC and KEE systems are commonly evaluated where grease, animal fats, oils or process exhaust may contact the roof. The exact chemical, concentration, temperature, duration and manufacturer guidance still have to be reviewed.
Is PVC chemical-proof?
No. Chemical resistance varies by membrane formulation, chemical type, concentration, temperature and exposure duration. A chemical-resistance review is required for industrial or process facilities.
Does a thicker membrane automatically make the roof better?
No. Thickness may improve certain durability characteristics, but reinforcement, thickness above the scrim, attachment, cover board, traffic, details, workmanship and maintenance can be equally important.
What is the difference between polyester and fiberglass reinforcement?
Polyester reinforcement is commonly used in mechanically attached thermoplastic membranes because of its strength and elongation characteristics. Fiberglass reinforcement can provide dimensional stability and is common in adhered PVC systems. The manufacturer-approved assembly controls.
Can PVC be installed over an existing asphalt roof?
Not directly without an approved separation or recovery design. PVC can be incompatible with asphalt, coal tar, some insulation facers and other materials. The existing assembly, moisture, layers, fire classification and manufacturer requirements must be verified.
Can PVC be installed over TPO?
A recover or tie-in may be possible only after the existing membrane is identified, moisture and attachment are evaluated, and an approved separation or recovery assembly is selected. PVC and TPO are not welded to each other as one continuous membrane.
How are PVC seams joined?
Thermoplastic seams are typically heat welded. Dependable seams require clean, dry material; correct temperature, speed and pressure; trial welds; probing; repairs; and documented quality control.
Can PVC solve ponding water?
No membrane by itself corrects structural deflection, blocked outlets or inadequate drainage. The project may require tapered insulation, crickets, drain work, scuppers, overflow or structural correction.
What causes punctures in PVC roofs?
Service traffic, dropped tools, sharp debris, equipment work, unprotected pathways and incompatible rooftop trades can damage a membrane. Cover board, walkway pads, access planning and maintenance controls can reduce risk.
Can an existing PVC roof be restored with a coating?
Sometimes, but only after the membrane is identified and the coating manufacturer confirms compatibility, preparation, primer, adhesion and warranty requirements. A coating should not cover wet insulation, failed attachment or unresolved drainage.
How do wind-pressure zones affect PVC attachment?
Field, perimeter and corner zones may require different sheet widths, fastener spacing, plate patterns, adhesive coverage, cover boards, edge systems or other enhancements. The approved assembly must meet the calculated pressure in each zone.
Does a manufacturer warranty mean the roof will not leak?
No. Warranty terms, exclusions, maintenance, notification, inspections, workmanship responsibilities and covered remedies vary. The written contractor and manufacturer documents control.
How should PVC and TPO be compared?
Compare the complete assemblies: chemical exposure, reinforcement, thickness, attachment, insulation, cover board, details, wind design, traffic, maintenance, warranty pathway and contractor qualifications—not membrane color alone.
South Florida service area
Commercial PVC and KEE roofing across Palm Beach and Broward Counties
Project acceptance depends on scope, access, schedule, system requirements and Aastro’s current service capacity.
Boca RatonBoynton BeachDelray BeachDeerfield BeachFort LauderdaleHollywoodPompano BeachWest Palm BeachPalm Beach GardensWellingtonCoral SpringsCoconut CreekDaviePlantationSunriseTamaracParklandWestonPembroke PinesPalm BeachLake Worth BeachNorth Palm BeachRiviera BeachMargate
Commercial PVC consultation
Send the roof records before the system is selected
Useful records include roof plans, prior proposals, moisture surveys, warranty documents, leak history, chemical or exhaust information, photographs and maintenance records.
