Why EPDM Works for Orland Park Flat Sections
EPDM (ethylene propylene diene monomer) is a synthetic rubber membrane that's been the residential flat-roof standard for 40+ years. It handles Cook County's freeze-thaw cycle without cracking, tolerates ponding water for short periods, and seams with adhesive or factory-taped strips that outlast the membrane itself.
- Service life: 20–30 years on residential applications
- Cost: $5.50–$9.50/sq ft installed (typical porch or addition: $1,800–$4,200)
- Color: black standard, white reflective available (~15% upcharge)
- Thickness: 45 mil residential, 60 mil for foot traffic or hail-prone areas
