01
ROOF DECK
The deck must provide a sound structural base for insulation, attachment and the selected roofing assembly.
SYNTHETIC RUBBER • SINGLE-PLY • FLEXIBLE MEMBRANE
EPDM ROOFING IN ATLANTA, GA
EPDM is a durable synthetic-rubber single-ply roofing system used on low-slope commercial buildings, with performance driven by seam detailing, attachment, flashing, substrate condition and drainage.
COMMERCIAL SINGLE-PLY
RUBBER MEMBRANE
LOW-SLOPE ROOFING
ATLANTA, GA
QUICK ANSWER • WHAT IS EPDM ROOFING?
EPDM is a synthetic rubber roofing membrane used primarily on low-slope commercial roofs. It is commonly installed in fully adhered, mechanically attached or ballasted assemblies depending on the system. Because EPDM sheets can cover large areas with relatively few field seams, edge securement, seam preparation, flashing and protection from punctures become especially important.
EPDM ROOF SYSTEM ANATOMY
FLEXIBLE MEMBRANE. DISCIPLINED SEAMS AND DETAILS.
The membrane may look simple, but a complete EPDM roof still depends on the layers and transitions beneath and around it. Deck condition, insulation, cover board, membrane attachment, seam products, perimeter details and drainage should be designed as one system.
02
INSULATION
Rigid insulation supports thermal goals and can be configured to improve positive drainage.
03
COVER BOARD
Where specified, cover board adds a more stable surface and can help protect insulation from impact and traffic.
04
EPDM MEMBRANE
Flexible synthetic-rubber sheets form the primary weathering layer and are available in different thicknesses and configurations.
05
SEAMS + FLASHING
Compatible tapes, primers, adhesives and molded accessories are used at laps, penetrations, curbs and transitions.
06
PERIMETER SECUREMENT
Edges and corners experience higher wind forces, making termination and securement details critical.
WHERE EPDM MAKES SENSE
A PROVEN OPTION FOR LOW-SLOPE COMMERCIAL ROOFS.
EPDM is often considered for offices, warehouses, schools, multifamily buildings and other low-slope properties where owners value a flexible membrane, large sheet sizes, established repair methods and a system that can accommodate different attachment approaches.
- Broad low-slope roof fields
- Roofs where large membrane sheets can reduce seam count
- Projects suited to adhered, mechanically attached or ballasted configurations
- Buildings with many curbs and penetrations requiring flexible flashing
- Owners willing to control rooftop traffic and puncture risk
- Existing EPDM roofs that may be candidates for targeted repair
EPDM VS. OTHER COMMERCIAL SYSTEMS
MATCH THE MEMBRANE TO THE BUILDING AND ROOF USE.
| System | Type | Seams / Joints | Standout Advantage | Watch Closely |
|---|---|---|---|---|
| EPDM | Synthetic rubber single-ply | Tape / adhesive seams | Flexibility + large sheets | Seams, punctures, dark surface heat gain |
| TPO | Thermoplastic single-ply | Heat welded | Reflectivity + welded seams | Weld consistency, drainage, puncture exposure |
| PVC | Thermoplastic single-ply | Heat welded | Chemical/grease resistance | Compatibility, details, specification |
| Modified Bitumen | Asphalt-based multi-layer | Product-specific laps | Redundancy + durable surfacing | Weight, installation method, transitions |
OTHER COMMERCIAL ROOF SYSTEMS
COMPARE THE ALTERNATIVES BEFORE LOCKING THE SPECIFICATION.
The right system starts with slope, deck, drainage, rooftop use, exposure, existing materials and ownership goals. These related commercial roof systems solve different problems and should not be treated as interchangeable products.
01
TPO ROOFING
Thermoplastic single-ply with heat-welded seams for low-slope commercial roofs.
EXPLORE TPO ROOFING →
02
PVC ROOFING
Thermoplastic membrane with welded seams and strong resistance to many grease and chemical exposures.
EXPLORE PVC ROOFING →
03
MODIFIED BITUMEN
Reinforced asphalt-based sheets that create durable multi-layer low-slope assemblies.
EXPLORE MODIFIED BITUMEN →
04
BUILT-UP ROOFING
Multi-ply bitumen and reinforcement for redundant commercial waterproofing.
EXPLORE BUILT-UP ROOFING → 05
COMMERCIAL METAL
Panel and standing-seam systems built around movement, attachment and flashing control.
EXPLORE COMMERCIAL METAL →EPDM INSTALLATION PRIORITIES
SEAM PREPARATION IS NOT A THROWAWAY STEP.
01
DECK + MOISTURE REVIEW
Identify deteriorated decking, saturated insulation, attachment concerns and areas that require removal.
02
INSULATION PLAN
Set thermal layers and drainage improvements before the membrane is installed.
03
ATTACHMENT METHOD
Select and execute the specified adhered, mechanically attached or ballasted configuration.
04
SEAM PREPARATION
Clean, prime and assemble seams exactly as required by the compatible EPDM accessory system.
05
FLASHING DETAILS
Address curbs, pipes, walls, drains, corners and terminations with compatible materials and geometry.
06
TRAFFIC + PROTECTION
Add walk pads or protection where service traffic is expected and keep sharp debris off the membrane.
THE POINT:
EPDM is forgiving in flexibility, not in shortcuts. Dirty seam surfaces, stretched flashing, poor terminations and uncontrolled roof traffic can turn an otherwise durable membrane into a repair schedule.
REPAIR, RECOVER OR REPLACE?
START WITH THE ROOF THAT IS ACTUALLY THERE.
Before recommending a commercial roof project, Ameristar Roofing can evaluate membrane or panel condition, moisture, insulation, deck concerns, drainage, penetrations, previous repairs and the remaining usefulness of the existing assembly.
A small leak does not automatically mean full replacement. The opposite is also true: a roof covered in patchwork is not automatically a good repair candidate just because another bucket of sealant can be purchased.
The decision should be based on the extent of deterioration, trapped moisture, attachment, recurring leak history, building plans and whether a repair or recover can reasonably restore dependable performance.
EPDM ROOFING FAQS
THE QUESTIONS THAT SHOULD BE ANSWERED BEFORE THE PROJECT.
What is EPDM roofing made from?
EPDM is a synthetic rubber membrane formulated for exterior roofing use. Commercial systems combine the membrane with compatible adhesives, tapes, primers, flashing accessories, insulation and attachment components.
Is EPDM only available in black?
Black EPDM is common, and some systems or products may be available with lighter surfaces. The appropriate specification depends on the roof design and manufacturer system.
How are EPDM seams sealed?
Modern EPDM field seams commonly use compatible primer and seam tape or other manufacturer-approved adhesive accessories rather than heat welding.
Can EPDM roofing be repaired?
Yes, many isolated punctures, open seams and flashing defects can be repaired when the surrounding membrane and substrate remain serviceable and compatible repair materials are used.
Is EPDM good around rooftop equipment?
It can be, but equipment service traffic, dropped tools and sharp edges increase puncture risk. Walk pads and planned service routes can help protect the membrane.
What causes EPDM roof leaks?
Common leak sources include aged or poorly prepared seams, penetration flashing, terminations, drains, punctures and water entering from adjacent walls or equipment rather than through the field membrane.
Should an old EPDM roof be repaired or replaced?
That depends on membrane condition, seam stability, moisture below the roof, deck condition, repair frequency, drainage and whether the existing assembly still supports a reliable repair strategy.
AMERISTAR ROOFING • ATLANTA, GA
BUILD THE ROOF AROUND THE BUILDING.
Ameristar Roofing can inspect the existing commercial roof, evaluate the assembly and help determine whether epdm roofing belongs in the repair, recover or replacement plan.
(770) 338-6361