Commercial Roof Repair for TPO, EPDM and Flat Roofs
Infinity Roofers provides commercial roof repair for TPO, EPDM, modified bitumen and other flat or low-slope roofs on offices, retail buildings, warehouses and multi-unit properties in Simi Valley, across Ventura County and around our Canoga Park and Pasadena locations. We find the source of the leak or damage first, then recommend a repair, restoration or replacement in writing.
California Licensed Contractor #1134192 (C-39 roofing). Use the contact page to arrange a roof visit for your building.
Commercial roofing systems we repair
| Roof system | Problems we repair |
|---|---|
| TPO (single-ply membrane) | Seam separation, punctures, flashing problems and membrane damage |
| EPDM (rubber membrane) | Membrane failures, leaks, damaged sections and weather-related deterioration |
| Modified bitumen | Aging, cracks, blistering and water intrusion |
| Other flat and low-slope roofs | Membrane damage, ponding water, cracked surfaces, separation at seams and deteriorated roofing materials |
We also handle the smaller repairs that keep a sound roof working: aging roofing components, minor leaks, sealant failures, flashing deterioration and surface damage. Fixed early, they keep water from reaching the insulation and the deck.
Signs your commercial roof needs repair
- Water that stays on the roof long after rain has stopped, especially around drains and low spots.
- Blisters, bubbles or wrinkles in the membrane, or seams that have started to lift.
- Stained ceiling tiles or damp insulation under the roof deck.
- Flashing pulling away at parapet walls, curbs and rooftop units.
- Clogged drains or scuppers, or debris piled against walls after wind.
- Cracked or worn surfaces where foot traffic to rooftop equipment has worn the membrane.
When a leak does show up inside, the common causes are damaged roofing membranes, failed flashing, roof penetrations, drainage problems and weather-related damage. Storms add wind, rain, debris impact and moisture intrusion to that list; see storm damage roof repair.
Energy rules when a commercial roof is replaced
California’s 2025 Energy Code draws a line that matters for budgeting. When more than 50 percent of a nonresidential roof, or more than 2,000 square feet of it (whichever is less), is replaced, recovered or recoated, the new low-slope roofing must meet the cool roof minimum in climate zones 6 and 9, which cover Simi Valley and the other Ventura County cities we serve: an aged solar reflectance of at least 0.63 and a thermal emittance of at least 0.75, or an SRI of 75.
A lower reflectance is allowed if the roof’s insulation meets a trade-off table, and the replaced or recovered area has to meet the code’s insulation level. Apartment and other multifamily roofs in Ventura County’s climate zones fall under a parallel rule with the same 0.63 reflectance minimum.
Repairs below that threshold do not trigger these rules, which is one reason the repair-or-replace question on a commercial roof has a code side as well as a cost side. Light-colored membranes are more likely to meet the minimum, but the product’s certified rating, not its color, is what counts.
Repair, restoration or replacement
Before recommending any work, we inspect the roofing system, identify the source of the problem, and determine whether a repair, restoration or replacement makes the most sense.
- Repair fits a roof that is sound overall with damage in specific areas: a punctured section, failed seams, a leaking curb.
- Restoration fits a roof whose membrane is worn across the surface but still dry and attached underneath, where renewing the roof costs less than tearing it off.
- Replacement fits a roof with widespread deterioration, wet insulation over large areas, or leaks that keep returning after repairs.
For buildings with pitched sections, see roof replacement; for new buildings and additions, see new roof installation.
Repairs on an occupied building
A leak can affect interior spaces, equipment, inventory, employees and tenants, so the work is planned around the people inside.
- Roof inspection and diagnosis. We inspect the roofing system to identify leaks, damage and areas requiring attention, then explain the recommended repair options.
- Repair planning and execution. We develop a repair plan around the building’s needs and complete the work while keeping disruption to the property low.
- Final review and recommendations. After the repair we review the work performed and recommend how to keep the roofing system in good shape.
To make the visit go smoothly, have ready: roof access (ladder, hatch or keys), the location of every interior leak, any past repair records, and a contact for the HVAC or equipment contractor if rooftop units need to be moved or disconnected.
What to ask before approving a commercial roof repair
- Exactly which areas are included? The written scope should name the sections, seams, curbs or drains being repaired.
- Is the repair material compatible with the existing membrane? TPO, EPDM and modified bitumen are different chemistries and are not patched interchangeably.
- Does the ponding have a cause that the repair fixes? Patching a seam that sits in standing water without improving drainage invites the same leak back.
- Will the work cross the 50 percent or 2,000 square foot line? If it does, the Energy Code rules above apply.
- What should be watched afterward? A good final review names the areas likely to need attention next.
Commercial properties we serve
Office buildings, retail properties, warehouses, industrial buildings, multi-unit properties, commercial facilities and property-managed buildings, in Simi Valley, Moorpark, Thousand Oaks, Camarillo, Oxnard, Ventura and the rest of Ventura County, and in Los Angeles County around our Canoga Park and Pasadena locations.
Need commercial roof repairs?
Send your building’s address, the roof system if you know it, and where water shows up inside through the contact page. After the visit you receive a detailed written estimate with project photos, the timeline and the material options for the repair.