Roof Systems
TPO Roofing
A split heat weld can admit water even when the surrounding TPO sheet looks clean. We check the lap, probe the seam, and inspect the nearby curb, drain, and termination before choosing a repair. In Fishers, winter snow and repeated freeze-thaw can leave water at a seam after daytime melt. The field record identifies the roof section and the limit of what we tested. That gives the owner and general contractor a repair boundary they can coordinate with other trades and the construction schedule.
What does the TPO assembly show?
We identify the membrane thickness where records or markings support it, then review attachment, cover board, insulation, and deck clues. The walk checks heat-welded seams, patches, penetrations, wall transitions, perimeter metal, and drainage. A test weld can show whether the existing sheet accepts a new seam after preparation. We record the test location and nearby conditions instead of treating one clean weld as proof across an entire roof section. If equipment, snow, or a screen blocks access, that area stays marked for a follow-up check.
TPO sheets can be mechanically attached or adhered, and the attachment changes how a repair connects to the existing field. We check fastener rows, plates, cover board, and the condition at perimeter zones where uplift demand differs from the center of the roof. If a prior overlay covers the original system, records or a targeted opening can identify what remains below. We do not assume that a surface patch restored attachment beyond its footprint. The proposal calls out any separate fastening or substrate work so the general contractor can coordinate it before another layer hides the detail.
Fishers Life Sciences and Innovation Park includes research, suppliers, and contract manufacturing organizations. A production facility may have operating limits around roof access, but each site contact sets those requirements. We coordinate the inspection window and keep the work area away from active equipment routes. At Fishers Life Sciences and Innovation Park, the location helps orient the visit; the roof plan and field evidence determine the repair. A commercial roof inspection can map the larger assembly before a local seam repair is priced.
Where can water travel?
Water entering at a TPO lap may move under the sheet, along insulation joints, or down a deck flute before reaching an interior mark. We compare the reported room with slope, nearby seams, curbs, drains, and prior patches. If the outlet is clear but water remains, we document the low area separately from the membrane opening. A moisture survey can help choose test locations, while a core confirms layers at its sample point. Each method answers a different question, and the report keeps those results tied to the tested roof section.
Indianapolis normals show 25.5 inches of annual snowfall, with winter amounts concentrated in January, February, and December. For a Fishers roof, meltwater can refreeze near drains and edges, so the inspection includes the drainage route and termination after winter weather. A drain and scupper check records outlet condition. If the concern is hidden moisture, a moisture survey can guide a direct inspection without treating a scan as the final repair boundary.
Roof Systems
How do we restore a heat weld?
A lasting TPO repair starts with sound, compatible sheet around the opening. We remove failed material within the approved limit, clean and prepare the lap, then set the welding conditions for the membrane and weather at the roof. The test weld comes first. After completing the repair, we probe the seam and document the closure. If the sheet is brittle, contaminated, or poorly attached, the boundary may need to move to material that can accept the tie-in. We explain that change before removing more area.
The repair quantity also depends on how the field is secured. We inspect whether fasteners remain tight, plates sit flush, adhesive has released, or the membrane has pulled at a perimeter. Those clues affect whether a patch can be welded to the existing sheet or whether surrounding material must be removed. A roof section that has several generations of patches may require more preparation and a separate test area. We list the measured boundary, daily dry-in point, and any change order trigger before work starts. That gives the general contractor a practical handoff for schedule and cost control.
Winter conditions can shorten an access window or delay welding when the substrate is cold, wet, or covered. In the 126th Street and I-69 corridor, delivery or equipment movement may affect a project schedule, but the building contact confirms the route and operating limits. For an occupied property, a phased work sequence sets the daily dry-in and handoff. A repair scope should state the membrane, preparation, test, tie-in, and any separate insulation work.
Roof Systems
When does a local patch stop being enough?
A targeted repair can fit when the field sheet remains attached and the surrounding insulation and seams support the tie-in. Repeated failures across multiple roof sections, wet insulation, or loose attachment can point toward a larger recover or replacement decision. We compare the affected area with the test results and repair history. If a roof is considered for restoration, coating compatibility and surface preparation need separate review; a finish layer cannot correct a failed seam below it. The scope identifies immediate protection, permanent repair, and any capital question separately.
System comparison matters when repairs recur. A TPO roof may share a building with another membrane from an addition, and the tie-in must respect both assemblies. A PVC roof review compares the existing sheet and accessory details, while an EPDM assessment follows a different seam and repair method. The owner should compare actual roof zones rather than assume one membrane choice applies across every addition. We document each transition, then estimate the work needed to leave a continuous water-control layer. If the roof is moving toward a larger project, the field record should identify removal limits, curb heights, drain tie-ins, and the dry-in plan for each shift.
Fishers reported 137 commercial building permits in 2024, compared with 123 the prior year. That construction activity makes clear roof handoffs useful when mechanical, electrical, and envelope trades share a project. The condition report can preserve photos and tested locations, while a capital review can compare recurring repairs with the next budget window. Share the roof section, leak history, access window, and construction schedule. We will identify what the TPO assembly supports and what needs another test.
Frequently Asked Questions
How do you test a TPO seam before repairing it?
We prepare a small test area and check whether the membrane forms a sound weld under the selected conditions. The report identifies the location and result; it does not extend that result to untested seams.
Can a TPO leak be repaired during a Fishers winter?
Sometimes. Snow, ice, moisture, and substrate temperature can limit preparation and welding. We inspect access and current conditions, then set a safe dry-in or return plan if the seam cannot be closed properly.
Does an infrared scan confirm wet insulation under TPO?
No. It can help locate areas for closer testing. A targeted opening confirms the layers at its sample point, and we document that boundary before setting removal quantities.
When should a TPO roof move from repair to replacement planning?
Repeated seam failures, wet insulation across several zones, or weak attachment can change the decision. We compare repair history, test results, access, and the owner’s budget window.
What should a TPO closeout record include?
Keep the membrane identification, test weld, repair location, preparation, material, photos, probe result, and any area left inaccessible. We also list a follow-up check if drying or another trade remains.
Fishers, IN
Set a TPO repair boundary
Send the roof section, leak history, access window, and construction schedule. We will inspect the assembly and identify the next supported action.
