Commercial Roof Replacement • TPO • Flat Roofs • Churches • Office Buildings

Commercial Roof Replacement (The Real Process)

A commercial roof replacement is not “just a new roof.” It’s a planned risk-reduction project that protects your building, your tenants, and your budget. Inspector Roofing and Restoration replaces commercial roofing systems with a documented process—so you understand what you’re getting, why it’s needed, and when a safe repair is the smarter move.

TPO / Single-Ply Flat Roof Replacement Tear-Off vs Recover Leak Prevention Code & Documentation

TPO vs Shingle (Commercial vs Residential)

A huge reason commercial owners get bad advice is people apply “shingle roof logic” to flat roofs. These systems fail differently and are repaired differently.

TPO / Single-Ply (Common Commercial)

  • Waterproofing layer: one membrane, welded seams, detailed flashings.
  • Failure points: seam welds, terminations, penetrations, edge metal, rooftop traffic.
  • Repairs: re-weld seams, reinforce flashings, compatible patches, drainage correction.
  • Replacement scope: may involve tear-off, insulation replacement, fastening pattern, new membrane, new flashings.

Shingles (Typical Residential, Sometimes Small Commercial)

  • Water shedding system: slope moves water off; underlayment + flashing do the rest.
  • Failure points: missing/damaged shingles, step flashing, pipe boots, valleys, decking issues.
  • Repairs: replace shingles/flashings; leaks are often localized (but not always).
If your building has a flat roof, your replacement conversation should start with membrane type + insulation + flashing details + drainage—not “how old is it?”

Commercial Roof Replacement Process (Step-by-Step)

Here’s what a professional commercial replacement looks like when it’s done with safety, documentation, and long-term performance in mind.

Document & Scope

We inspect the roof, identify failure points, note wet areas (if present), review details (curbs, drains, edges), and build a replacement scope that matches reality.

Decide: Tear-Off vs Recover

Some roofs require tear-off (wet insulation, multiple layers, code limitations). Others can be recovered safely. We explain what’s possible and why.

Safety & Containment Plan

We plan staging, access, fall protection, debris control, tenant protection, and “keep the building running” logistics.

Remove / Prep the System

Tear-off (if needed), replace wet insulation, correct substrate issues, and prepare edges/penetrations for long-term detailing.

Install Insulation + Membrane

Install insulation per design, then the membrane with correct fastening pattern and seam welding. Details matter more than the brand name.

Flashings, Edges, Drains

Most commercial leaks originate here. We treat these details as the “roof system,” not an afterthought.

Final Walk + Documentation

We provide a final walkthrough, photo documentation, maintenance guidance, and any warranty details that apply to your system.

Maintenance Plan (Optional, Smart)

Simple, consistent maintenance reduces future leaks and extends service life—especially for TPO/single-ply systems.

Want claims help? If a storm caused the damage, start at Commercial Claims Support and we’ll align documentation to the scope.

Cheap or Free Safe Fixes (That Often Stop “Emergency” Leaks)

These are safe, non-destructive actions that can reduce damage or stop simple leak causes. They don’t replace professional evaluation—but they can prevent a small issue from becoming a big interior loss.

1) Clear drains & scuppers

Remove leaves/debris. Ponding water increases leak probability fast. If it’s safe to access, this is often the highest ROI “free fix.”

2) Remove rooftop debris

Branches/loose objects can puncture membranes and damage flashings. Clearing debris reduces active risk and makes inspections accurate.

3) Check obvious interior sources

Some “roof leaks” are HVAC condensate, clogged drain lines, or wall flashing issues. A quick interior check can save time and cost.

4) Temporary interior protection

If water is entering, protect assets: move inventory, use catch bins, and document entry points. This reduces damage while the roof is evaluated.

5) Don’t smear random sealants

Many consumer sealants can void warranties or make professional repairs harder. If you’re not sure, stop and get a documented plan.

6) Schedule a documented evaluation

Even if the fix seems simple, documentation protects you for budgeting and claims. Start at Commercial Roofing Service.

Safety first: Only access a roof if your building policies and safety conditions allow it. We can guide you remotely and then provide the on-site documented plan.

Commercial Replacement for Churches

Churches need a replacement plan that prioritizes minimal disruption and protects interior spaces used weekly. We stage work to keep access and services running while controlling noise, debris, and weather exposure.

  • Work sequencing that avoids peak service days
  • Interior protection plan for sanctuaries and classrooms
  • Drainage focus to prevent recurring water intrusion
  • Documentation helpful for boards and committees

Commercial Replacement for Office Buildings

Office buildings require a replacement plan that prioritizes tenant protection, scheduling, access, and documentation. We focus on containment, predictable timelines, and clear reporting—especially when multiple suites are impacted.

  • Tenant-safe containment and clean staging
  • Clear schedule communication and work zones
  • Risk reduction for critical areas (IT rooms, conference spaces)
  • Documentation useful for owners and facility managers

Commercial Roof Replacement FAQs

How long does a commercial roof replacement take?

It depends on roof size, access, weather, and whether tear-off is required. We provide a schedule plan before work begins, with sequencing designed to reduce disruption.

What’s the difference between tear-off and recover?

Tear-off removes the existing system and allows wet insulation/substrate correction. Recover installs a new system over an existing one when conditions and code allow. We determine the safest option during scoping.

Can a TPO roof be repaired instead of replaced?

Often, yes—if problems are localized and the membrane is still in good condition. Seam re-welds, flashing reinforcement, and compatible patches can be effective. If wet insulation is widespread or seams are failing across the roof, replacement is more predictable.

When is replacement NOT the right answer?

When leaks are isolated to one detail (curb/flashing/drain), when the membrane is generally stable, or when maintenance/drainage is the root cause. We look for safe repairs first and only recommend replacement when it reduces risk and total cost.

What if storm damage is involved?

Start at Commercial Claims Support. Good documentation and accurate scoping are key—especially for membranes where punctures and seam issues may not be obvious from the ground.

Commercial Educational Loop (Use These Links)

Keep decision-makers in the loop: Start at the hub, validate the system, learn the criteria, then pick the correct action.

© Inspector Roofing and Restoration • Commercial Roof Replacement • Metro Atlanta / North Georgia

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