Most articles about EPDM roofing list the same benefits: long life, flexibility and resistance to weather. Those points describe the material, but they do not tell a Kentwood building owner how their roof will perform. That also depends on installation details: which membrane is chosen, how the seams are made, how the sheet is attached, how every penetration is flashed, and how water leaves the roof.
Kentwood roofs deal with lake-effect snow, long freezing stretches, repeated freeze-thaw cycles in spring and fall, and summer storms. Warehouses, offices, churches, schools and light-industrial buildings across the city rely on flat or low-slope roofs where those details help keep water out.
This guide explains the decisions involved in an EPDM installation in Kentwood, MI, so you know what to ask for in a proposal and what to look for when the crew finishes.
Choosing the Right EPDM Membrane
EPDM is not one product. The membrane should suit the building, roof deck, proposed assembly and expected use.
Thickness
- 45 mil: A thinner option where the approved assembly and project requirements permit it.
- 60 mil: A common commercial option that balances membrane thickness and cost.
- 90 mil: Additional thickness where durability is a priority, subject to the selected system’s requirements.
Thicker sheets can offer greater puncture resistance. Performance also depends on the product, supporting layers and severity of the impact. Walkway protection and careful rooftop work remain important at every thickness.
Reinforced vs. Non-Reinforced
Non-reinforced EPDM generally offers greater elongation and is commonly used in approved fully adhered and ballasted systems.
Reinforced EPDM contains an internal fabric scrim that adds strength and dimensional stability. It is commonly specified for mechanically attached systems. The manufacturer’s approved assembly determines which membrane is suitable.
Black vs. White
Black EPDM absorbs more sunlight than white-surfaced EPDM. Its effect on heating, cooling and snowmelt varies with weather, insulation and building conditions, so color should not be used as a substitute for drainage or snow-management planning.
White-surfaced EPDM reflects more sunlight and may reduce summer cooling demand. Actual savings depend on the complete roof assembly, HVAC system and building use.
Sheet Size
Wider and longer sheets can reduce field seams. Layout still needs to suit the roof’s size, shape, attachment method and flashing details.
How EPDM Seams Are Made
Seams are important potential leak points, so preparation, compatible materials and workmanship deserve close attention.
Seam Tape
Many modern commercial EPDM systems use factory-applied or field-applied seam tape. The exact procedure depends on the selected products, but generally includes:
- Clean the splice surfaces as required to remove contaminants.
- Apply compatible primer and allow it to dry according to the manufacturer’s instructions.
- Position the tape and overlapping sheets as specified.
- Remove the release liner using the required technique.
- Roll the seam firmly with the specified roller and rolling pattern.
Overlap Width
The manufacturer specifies membrane overlap and tape placement. Tape width and sheet overlap are different dimensions, so neither should be assumed from a general rule. Incorrect details can affect performance and warranty eligibility.
Cover Strips and T-Joints
Where sheets intersect, changes in membrane thickness need careful detailing. T-joints and end laps receive the patches, cover strips or other accessories required by the selected system.
Lap Sealant
Lap sealant is applied at exposed seam or flashing edges where the manufacturer requires it. It does not replace proper preparation and bonding.
Checking the Work
Completed seams should be inspected using methods approved for the roofing system, and defects should be corrected before completion. Seams also need attention during routine maintenance. Our guide, Why Have a Roof Inspection?, explains the value of regular roof checks.
EPDM Attachment Methods
How the membrane is held down affects wind resistance, project cost, structural loading and future access for repairs. There are three main options.
Fully Adhered
The membrane is bonded to a suitable substrate using an approved adhesive. Adhesive type, coverage and application method depend on the system. Wind performance also depends on how the underlying insulation and cover board are secured.
Temperature matters during installation. Adhesives have product-specific air, surface and storage requirements, so cold-weather work must remain within those limits.
Mechanically Attached
Approved membrane is secured to a suitable deck using specified plates, fasteners or battens. The attachment pattern follows the building’s wind-resistance requirements, with additional securement where the approved design requires it.
Although this method may reduce bonding-adhesive use, seams and flashing still have application requirements that must be met in cold weather.
Ballasted
Loose-laid EPDM is held down by specified stone or pavers. The structure must support the added weight, and building height and wind exposure affect suitability. Ballast can also complicate access to the membrane for leak investigation.
Insulation and Cover Board
The insulation and supporting layers form part of the complete assembly. Polyiso is one common insulation option, and some designs include a cover board for additional protection and a suitable membrane substrate. Materials and securement depend on the selected roofing system.
The same design considerations apply nearby; our page on EPDM Roofing in Wyoming, MI provides related information.
Flashing Penetrations on an EPDM Roof
Pipes, curbs, walls and roof edges create transitions in the waterproofing. Each needs a compatible detail. Common features include:
- Pipe and vent stacks: Compatible pre-molded boots or approved field-formed flashing, with the specified base connection, clamp and top seal.
- Odd-shaped penetrations and clusters: Formable flashing or approved sealant pockets suited to the penetration. Sealant pockets require periodic inspection and maintenance.
- HVAC and skylight curbs: Flashing carried up the curb with properly detailed corners and top termination. Required height depends on the system and project conditions.
- Parapet walls: Membrane secured and protected using the specified wall-flashing, termination, counterflashing or coping details.
- Roof edges: Edge metal integrated with the membrane using the approved securement and flashing arrangement.
- Gas lines and conduit: Suitable supports that prevent abrasion or concentrated damage to the membrane.
Movement and exposure can affect flashing, clamps and sealants. Inspect these details during scheduled maintenance and repair deterioration when needed rather than applying sealant indiscriminately.
Drainage Design for Kentwood Snow and Freeze-Thaw
EPDM provides a water-resistant surface, but it does not replace effective drainage. Standing water adds weight, collects debris and can freeze around vulnerable details. Drainage should be part of the roof design.
- Tapered insulation: Creates slope toward outlets where needed. Crickets and saddles redirect water around curbs and between drains.
- Interior drains: The membrane must be integrated with the drain assembly according to the specified detail. Strainers help keep debris from entering the drainage system.
- Scuppers and gutters: Provide perimeter drainage where appropriate, with suitable sizing and membrane connections.
- Overflow drains or scuppers: Provide backup drainage where required if primary outlets become blocked.
- Snow and ice planning: Drain placement, outlet conditions and maintenance should account for snowmelt and potential ice blockage.
Water remaining for roughly 48 hours after rainfall under suitable drying conditions warrants investigation, especially when it recurs. Blocked outlets, low spots or inadequate slope may require attention.
Installation Details vs. Broad Material Claims
When comparing EPDM proposals, separate the material’s characteristics from the work proposed for your building.
Broad Material Claims
- Long service life under suitable conditions
- Flexibility in cold weather
- Resistance to UV and ozone
- Repairability using compatible materials
These characteristics do not guarantee the performance or lifespan of an individual roof.
Installation Details That Affect Roof Performance
- Membrane thickness and reinforcement
- Seam materials, primer, overlap and inspection methods
- Attachment method and securement designed for the building’s wind exposure
- Insulation type, thickness and supporting layers
- Flashing at each penetration, curb, wall and edge
- Slope, drain placement and overflow provisions
- Warranty coverage, eligibility rules and any required final inspection
A strong proposal spells out these details in writing. If a quote only lists EPDM’s benefits, ask how the seams, attachment and drainage will be handled.
Get an EPDM Roofing Quote in Kentwood, MI
An EPDM project starts with understanding the existing roof and the proposed assembly. An assessment helps establish whether installation, replacement or localized repairs are appropriate, along with any need for further investigation.
Contact Armor Commercial Roofing to discuss EPDM roofing in Kentwood, MI and arrange a roof assessment.
FAQs About EPDM Roofing in Kentwood, MI
What Thickness of EPDM Is Best for a Commercial Roof in Kentwood?
A 60-mil membrane is a common commercial option, while 90 mil provides additional thickness. The right selection depends on the approved assembly, exposure, expected foot traffic, budget and manufacturer requirements. Membrane thickness alone does not determine impact resistance or service life.
Can EPDM Be Installed in a Michigan Winter?
Some installations can proceed when conditions meet the manufacturer’s requirements. Adhesives, primers, tapes and flashing materials have product-specific limits. Mechanically attached systems still require suitable conditions for seams and details. Surfaces must be properly prepared and free of frost or moisture that interferes with bonding.
How Are EPDM Seams Sealed?
Many modern systems use approved primer and seam tape, rolled according to the manufacturer’s instructions. T-joints, end laps and exposed edges receive the accessories or sealants specified for that system.
Which Is Better for My Building: Adhered, Mechanically Attached or Ballasted EPDM?
The choice depends on the deck, wind exposure, structural capacity, substrate and project requirements. Each method can perform well in an appropriate approved assembly. Ballasted roofs also require adequate capacity for the ballast and other applicable loads.
Does Black or White EPDM Work Better in Kentwood?
Black EPDM absorbs more sunlight, while white-surfaced EPDM reflects more. The best choice depends on insulation, heating and cooling demand, building use and energy goals. Neither color eliminates the need for proper drainage or snow management.
Why Does My EPDM Roof Leak Around Pipes and HVAC Units?
Leaks can develop at damaged boots, open flashing seams, failed terminations or deteriorated sealants. Movement, aging and installation defects can contribute. An inspection helps identify the actual source so the repair addresses the failed detail.
How Do I Know If My EPDM Roof Is Draining Properly?
Recurring water that remains roughly 48 hours after rain, under suitable drying conditions, deserves investigation. Dirt rings, blocked outlets and ice buildup can also indicate drainage concerns. A professional assessment can identify whether cleaning or design changes are needed.
Can an Old EPDM Roof Be Repaired Instead of Replaced?
Often, localized seam, puncture and flashing damage can be repaired when surrounding materials remain suitable. Widespread deterioration, substantial shrinkage or wet underlying materials may call for sectional or full replacement, depending on the findings.
How Long Does an EPDM Roof Installation Take in Kentwood?
Commercial projects may take a few days to several weeks or longer, depending on roof size, access, tear-off, underlying repairs, attachment method and weather. The proposed scope should include a project-specific schedule.