Rubber Membrane Roofs
We install, replace, and repair EPDM rubber roofs on older Sierra Vista retail and office buildings. As an EPDM roofing contractor, we start by checking the existing sheet and insulation.
EPDM fits low-slope roofs, especially ones that already have rubber on them. The second column covers what has to change first.
Rubber roofs age in predictable places. These six conditions account for most of the EPDM leaks we trace.
EPDM work runs from a single boot repair to a full new roof. Moisture readings decide which option makes sense.
| Option | When It Fits | What It Involves |
|---|---|---|
| Seam and flashing repair | Dry insulation with open laps or failed flashing | Laps cleaned, primed, and re-taped; new flashing at walls and curbs |
| Section tied into existing EPDM | One wet area on an otherwise dry rubber roof | Wet area cut out, insulation replaced, new sheet spliced into the old |
| Full tear-off and new EPDM | Widespread wet insulation or repeat leaks | Old roof removed, deck repaired, new insulation and fully adhered sheet |
| White-topped EPDM | Cooled offices and clinics under the roof | Reflective top surface in place of standard black |
| Reflective coating on EPDM | Dry, well-adhered black sheet with surface wear | Sheet cleaned and primed, then a reflective coating applied |
Owners of older rubber roofs notice these differences after replacement or a full seam and flashing repair.
Open laps and split pipe boots are the usual EPDM leak points, and both can often be repaired. Tell us where the stains are and how old the roof is.
What To Have Ready
Repair or replacement, every EPDM job runs through the same five steps.
Every lap, boot, and wall flashing gets checked, and storm damage is marked on the sheet. A core cut tells us whether the insulation under the rubber is still dry.
Moisture readings set the scope. Dry roofs get seam and flashing repairs, one wet area gets a spliced section, and widespread water means a full replacement.
Old EPDM has to be scrubbed and primed before new tape will bond. That step is what makes a repaired lap last instead of peeling back after one summer.
New seam tape is rolled into primed laps, and each pipe and vent gets a molded boot or wrapped flashing. Wall flashing is tied off under a termination bar.
Repairs and new sheet are checked lap by lap before we leave. You get photos of each repaired seam and penetration for your maintenance file.
Two other roof systems come up often when an EPDM roof is nearing replacement.
Buildings that run cooling all day often move from black rubber to white TPO when the old roof comes off.
TPO roofing for Sierra Vista flat roofs
Sloped sections and steel buildings are better served by standing-seam panels that shed monsoon rain quickly.
Commercial metal roofing in Sierra VistaEPDM wins when the building already has a rubber roof over dry insulation, or when the roof needs a sheet that stays pliable through cold-night swings. Its long track record and simple patching are why it shows up on so many older Sierra Vista buildings.
Black EPDM does absorb heat, so over cooled space we talk through white-topped EPDM or a reflective coating during the inspection.
Usually, if the sheet is still flexible and dry underneath. Old rubber has to be scrubbed and primed so new tape bonds, and a patch is only as good as that prep. Brittle, shrunken sheet that tears when pulled is past patching and points toward replacement.
It comes down to what sits under the roof. Black EPDM absorbs heat, which matters over offices and clinics that cool all day. White-topped sheet reflects more sun at this elevation, while black remains common over storage and unconditioned space.
Pipe boots and vent flashing take the most movement on a rubber roof. Sun and freeze-thaw cycles split the boot collar, and the clamp at the top loosens. Replacing the boot with a new molded piece fixes most of these leaks without touching the rest of the roof.
Yes, when the existing sheet is dry and still bonds. The wet area is cut out, the insulation replaced, and new EPDM is spliced in with primed tape. A core cut on the neighboring sheet confirms it is worth tying into before work starts.
Scope sets cost more than the sheet. How many laps need re-taping, the number of pipes and curbs to flash, how much insulation is wet, and whether the old roof comes off all change the total. A ballpark estimate gives a range before the inspection firms up the scope.
Call or send a few details. We will check the laps, boots, and insulation and tell you whether repair or a new EPDM roof makes sense.
Leave a name and number and we'll call about your building's roof. Or call now: (623) 310-0174