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Gemini General Contracting

Ballasted Commercial Roofing

Ballasted Roof Leak Repair Without the Guessing

Got a commercial flat roof covered in stone and a leak nobody can seem to find?

Instead of repeatedly moving small sections of ballast and hunting blindly for a hidden membrane failure, Gemini can establish a defined investigation and repair zone, expose the roofing assembly, document what we find and repair the authorized area.

REQUEST A BALLASTED ROOF INSPECTION

Commercial · Industrial · Retail · Office · Multifamily

Prefer to talk? Call (833) 743-6464

Flat commercial roof covered in loose stone ballast with skylights and rooftop ductwork
Stone ballastHidden membrane below
Industry reference photo of a ballasted roof, not a Gemini project. Photo: IKO
20 Years in Business20 Years In Business
BBB A+ Rated
Licensed & Insured

Serving commercial properties throughout Gemini's service areas in Indiana, Ohio and Illinois.

Hidden Under Stone

Why Ballasted Roof Leaks Are Different

The membrane on a ballasted roof is hidden beneath stone.

Water can enter in one location, travel through the assembly and appear somewhere else inside the building.

Top to bottom

  1. Stone Ballastabove
  2. Roof Membraneabove
  3. Insulation / Roof Assemblyabove
  4. Roof Deckabove
  5. Building Interior
How water can migrate through a ballasted roof assemblyWater enters through a membrane failure on the left, travels laterally through the insulation, and appears as an interior leak farther to the right.WATER ENTERS HEREpuncture, seam, penetration or flashingTRAVELS LATERALLYDRIP APPEARS HEREinside the building1. STONE BALLAST2. ROOF MEMBRANE3. INSULATION / ROOF ASSEMBLY4. ROOF DECK5. BUILDING INTERIOR

The drip inside doesn't necessarily

mark the hole in the roof.

The Leak-Hunt Loop

Stop Paying Contractors to Guess

A leak appears. Stone gets moved. Nothing obvious is found. Another repair is attempted—and the building leaks again.

Gemini takes a different approach:

Turn an unknown leak into

a defined scope of work.

  1. 01A property manager identifies a leak.
  2. 02A roofing contractor moves some stone.
  3. 03Nothing obvious appears.
  4. 04More stone gets moved.
  5. 05Another repair is attempted.
  6. 06The building leaks again.
  7. …and the cycle repeats

Four Steps · One Defined Area

The Gemini Ballasted Roof Repair Process

  1. 1

    Locate

    Document the interior leak and establish the probable roof area.

    The membrane failure may not be directly above the interior leak.

  2. 2

    Define

    Agree on an investigation/repair zone instead of an unlimited leak hunt.

    10' × 10' Investigation / Repair Zone

    Example

    20' × 20' Investigation / Repair Zone

    Example

    Custom Larger Zone

    Example

    Example zone sizes are a scoping method—not a guarantee of where water entered.

  3. 3

    Expose & Repair

    Move the ballast, expose the roofing assembly, document the conditions and repair the authorized area.

  4. 4

    Restore & Document

    Restore the roofing system and ballast and provide before/during/after documentation.

Critical

What If the Leak Isn't Inside the First Area?

Water can travel beneath a ballasted roofing system.

If evidence points outside the initial zone, we document what we found and discuss the next logical investigation area before expanding the scope.

Zone openedFindings documentedNext area identifiedScope discussedProceed if authorized

Controlled investigation.

Not an open-ended leak hunt.

Once the Stone Is Moved

Common Problems We Find on Ballasted Roofs

Membrane Punctures

Failed Seams

Flashing Problems

Roof Penetrations & Curbs

Wet or Damaged Insulation

Drainage Problems

Displaced Ballast

Aging Roof Systems

Previous Failed Repairs

Many ballasted commercial roofs use EPDM, but roof assemblies vary. Gemini identifies the existing system before determining the repair approach.

Scope · Bid · Document · Repeat

Built for Property Managers

  • Property Managers
  • Facility Managers
  • Building Owners
  • Industrial Facilities
  • Commercial Portfolio Managers
  • Multisite Operators

Recurring ballasted-roof leaks shouldn't require another open-ended investigation every time.

Gemini creates a repeatable process that's easier to scope, bid and document across one property or an entire portfolio.

One leak.

One defined area.

One documented process.

  1. Interior Leak Location
  2. Probable Roof Area
  3. Defined Investigation Zone
  4. Ballast Removed
  5. Roof Exposed
  6. Findings Documented
  7. Repair Authorized
  8. Ballast Restored

Localized Problem

Puncture, seam, flashing or other isolated failure.

Bigger Problem

Wet insulation, widespread deterioration, repeated repairs or an aging roof system.

We document what we find and explain the options.

Tell Us Where Your Ballasted Roof Is Leaking

Tell us what's happening and where you're seeing water inside. We'll take it from there.

REQUEST A BALLASTED ROOF INSPECTION

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Prefer to talk? Call (833) 743-6464.

Serving commercial properties throughout Gemini's service areas in Indiana, Ohio and Illinois.