Empire Contractors installs and services single-ply commercial roofing, including EPDM, for building owners in Green Bay, WI. The company has been in business for 28+ years as a second-generation roofing company, and it approaches every roof inspection-first, so the system recommended matches the building in front of the crew. If you manage a flat or low-slope commercial roof in Green Bay, EPDM is one of the single-ply membranes worth evaluating for a Green Bay commercial roof.
EPDM is a synthetic rubber membrane. Whether it is the right choice depends on your roof deck, drainage, how the building is used and how you plan to maintain it. This guide explains how EPDM works, where it tends to fit well in Green Bay, how it compares with TPO, and what to settle before you request a proposal. To discuss a specific building, call Empire Contractors at (231) 861-7221.
What EPDM Roofing Is
EPDM stands for ethylene propylene diene monomer, a rubber-like material supplied in large sheets. EPDM is supplied in large sheets, which can reduce the number of field seams on some roof layouts. EPDM is a single-ply system, which means the waterproofing layer is one membrane over the insulation and deck. Empire Contractors’ single-ply membrane page gives an overview of the single-ply family that EPDM belongs to, alongside TPO and PVC.
EPDM can be installed in several ways. It may be fully adhered to the surface below, mechanically attached with fasteners, or held down with ballast such as stone. Which attachment method fits depends on the roof assembly, deck, structural conditions, wind-design requirements, selected system and project scope. A good proposal names the method rather than just the material.
Why EPDM Gets Considered for Green Bay Roofs
Green Bay commercial roofs can experience snow, ice, freeze-thaw conditions and spring runoff. EPDM is a flexible synthetic rubber membrane, but cold-climate suitability still depends on the complete roof assembly, drainage, seams, flashing, penetrations and installation details. Flexibility does not replace good drainage or sound details, though. Seams, flashing, drains, penetrations and other transitions deserve close attention because defects there can become water-entry paths.
Color is another consideration. EPDM is commonly black, which absorbs heat, while TPO is commonly white and reflective. The effect of membrane color on building energy use depends on insulation, roof assembly, HVAC, building use, season and other conditions, so color alone should not decide the system.
EPDM and TPO at a Glance
Both systems are used on commercial flat roofs, and each has a place. The table below summarizes general differences to bring into a conversation with your roofer. It is a starting point, not a verdict, because the right choice comes from the roof’s condition and your goals.
| Topic | EPDM | TPO |
|---|---|---|
| Material | Synthetic rubber sheet | Thermoplastic sheet |
| Common color | Black | White or light, reflective |
| Seams | Joined with seam tape or splice adhesive | Joined by heat welding |
| Attachment options | Fully adhered, mechanically attached or ballasted | Typically fully adhered or mechanically attached |
| Cold-weather behavior | Flexible synthetic rubber; overall cold-weather performance depends on the complete assembly and detailing | Performs well when installed correctly; details matter |
| Where it often fits | Projects where the selected EPDM system fits the roof assembly, detailing, drainage and owner priorities | Projects where the selected TPO system fits the roof assembly and reflective surface or welded seams are desired |
For a closer look at the alternative, see Empire Contractors’ page on TPO roofing systems in Green Bay.
What Should Be Confirmed Before EPDM Is Specified?
A useful EPDM proposal should identify the existing roof system, deck type, insulation condition, drainage, attachment method, flashing details, penetrations and any materials that will remain in place. It should also explain how moisture concerns will be investigated and what happens if concealed deterioration is found after work begins.
EPDM should not be selected only because the membrane itself is flexible or because another building uses it successfully. The roof assembly and the details around edges, walls, drains, curbs and penetrations have to work together as one system.
Start With an Inspection
Before any membrane is chosen, the existing roof has to be understood. A commercial roof inspection in Green Bay looks at membrane condition, seams, flashings and drainage, and it gives you condition evidence to compare proposals against. If moisture or deck deterioration is confirmed, the proposal should explain what material must be removed, repaired or further investigated before a new membrane is installed.
Questions to Settle Before You Request a Proposal
- Is the project a repair, a coating or restoration, or a full replacement? The scope changes everything that follows. Empire Contractors’ page on commercial roof replacement in Green Bay explains how to plan one.
- Which attachment method will be used, and why does it fit the building?
- How will seams, flashings, drains and penetrations be detailed?
- What is included for insulation and deck repair if wet material is found?
- How will the work be scheduled around the building’s operations?
Written answers make it easier to compare proposals on the same scope and understand how added conditions will be handled if they are discovered.
Caring for an EPDM Roof After Installation
Any membrane performs best when it is looked after. Ongoing reviews of seams, flashing, drainage and rooftop conditions can help identify maintenance needs before they expand. Empire Contractors’ commercial roof maintenance in Green Bay page describes how routine care fits into an ongoing plan. Service life depends on the installed system, detailing, roof conditions, maintenance, drainage and other project-specific factors, so a proposal should rely on the actual system and written product terms rather than a generic lifespan claim.
Talk With Empire Contractors About EPDM in Green Bay
If you are comparing EPDM, TPO or another approach for a Green Bay building, Empire Contractors can walk you through the options, inspect the roof and explain what each choice would mean for your building. Call (231) 861-7221 to get started.
Frequently Asked Questions
Is EPDM a good choice for Green Bay winters?
EPDM is a flexible synthetic rubber membrane, but suitability for a Green Bay roof depends on the full roof assembly, drainage, seams, flashing, penetrations and installation details. An inspection should establish those conditions first.
How is EPDM different from TPO?
EPDM is a synthetic rubber, commonly black, with seams joined by tape or adhesive. TPO is a thermoplastic, commonly white, with heat-welded seams. Both are single-ply systems, and the better fit depends on the building and your goals.
Can EPDM be installed over an existing roof?
Sometimes, when the existing assembly and project design allow it. Moisture, damaged deck areas, incompatible materials, attachment requirements and the selected system can change whether an overlay is appropriate.
How do I get a proposal for EPDM roofing in Green Bay?
Call Empire Contractors at (231) 861-7221 to discuss the building and schedule an inspection. The proposal can then be written around what the roof actually needs.