Direct Answer
A GC should treat the manufacturer warranty inspection as a formal roofing quality and closeout milestone, not simply as a final walk-through. The inspection is typically used by the roofing manufacturer to determine whether the installed roof system meets the manufacturer’s requirements for the applicable warranty or guarantee. Depending on the manufacturer and warranty program, the process may include field inspections during installation, a final inspection, correction of deficiencies, and submission of documentation before the warranty is issued. :contentReference[oaicite:0]{index=0}
The GC’s job is to make sure the inspection is planned early, the roof is genuinely ready when the manufacturer arrives, deficiencies are assigned and corrected, and the final warranty document actually matches the project that was constructed. A manufacturer inspection should not be treated as a substitute for the GC’s own quality-control inspections or an independent consultant’s review.
For Florida commercial projects, the GC should also confirm that the completed assembly, approved products, installation details and required project documentation align with the applicable construction documents and Florida requirements. Manufacturer warranty requirements are separate from the AHJ’s inspection process.
Who This Applies To
- General contractors and construction managers
- Commercial roofing subcontractors
- Owners and developers
- Architects and construction administrators
- Facility managers receiving a newly constructed roof
- Florida commercial construction project teams
Not for: This FAQ explains the typical GC process for manufacturer warranty inspections. The exact inspection scope, timing, warranty conditions, required documentation and correction procedures vary by manufacturer, roofing system, warranty type and project contract.
1. Understand What the Manufacturer Inspection Actually Does
A manufacturer warranty inspection is primarily concerned with whether the roofing system was installed in accordance with the manufacturer’s applicable requirements and whether the conditions necessary for warranty issuance have been satisfied.
Depending on the system, inspectors may review items such as:
- Membrane installation
- Seam quality
- Perimeter securement
- Flashings
- Penetrations
- Roof drains and drainage details
- Curbs and rooftop equipment interfaces
- Termination details
- Fasteners and attachment patterns
- Visible workmanship deficiencies
- Use of approved system components
- Overall compliance with manufacturer installation requirements
NRCA has described manufacturer inspection as part of the process used to verify that installation standards have been satisfied before a manufacturer’s warranty is issued. :contentReference[oaicite:1]{index=1}
2. The Manufacturer Inspection Is Not the Same as the GC’s Final Inspection
This distinction is important.
| Review | Primary Purpose |
|---|---|
| GC quality-control inspection | Verify construction quality and contract requirements throughout the project |
| Architect/engineer review | Verify compliance with the design and contract documents within the reviewer’s scope |
| Manufacturer warranty inspection | Verify conditions required by the manufacturer’s warranty or guarantee program |
| AHJ inspection | Verify applicable code and permitting requirements |
| Owner/consultant inspection | Evaluate completion, workmanship and contractual acceptance within its defined scope |
One inspection should not be assumed to satisfy all of these functions. A manufacturer can approve a roof for its warranty program while the GC still has unresolved contractual punch-list items. Conversely, passing a building inspection does not automatically mean the manufacturer’s warranty requirements have been satisfied.
3. Schedule the Manufacturer Inspection Early
One of the biggest GC mistakes is waiting until the final week of the project to think about the manufacturer’s inspection.
The inspection should be incorporated into the roofing schedule well before substantial completion.
A practical sequence is:
- Identify the required manufacturer warranty during procurement.
- Confirm the manufacturer’s inspection requirements.
- Determine whether intermediate inspections are required.
- Coordinate inspection timing with the roofing subcontractor.
- Build corrective-work time into the schedule.
- Complete the roof sufficiently for inspection.
- Perform the contractor’s internal punch inspection first.
- Schedule the manufacturer representative.
- Receive and review the manufacturer’s inspection report.
- Correct all required deficiencies.
- Obtain reinspection or documented verification when required.
- Collect the executed warranty before final closeout.
Recent commercial roofing closeout guidance similarly recommends treating the manufacturer inspection and resulting corrective work as a separate closeout milestone rather than assuming the warranty document will arrive automatically at substantial completion. :contentReference[oaicite:2]{index=2}
4. Do an Internal Punch List Before the Manufacturer Arrives
The roofing contractor should not use the manufacturer’s inspection as its first quality-control inspection.
Before the manufacturer arrives, the GC should require the roofing subcontractor to conduct a detailed self-inspection and correct obvious deficiencies.
The internal review should cover:
- Membrane seams
- Flashing terminations
- Perimeter details
- Drains
- Scuppers
- Penetrations
- Pipe boots
- HVAC curbs
- Expansion joints
- Fasteners
- Sheet-metal details
- Sealants
- Membrane damage
- Debris
- Drainage conditions
This gives the roofing contractor an opportunity to correct workmanship issues before they become manufacturer punch-list items.
5. Expect the Manufacturer to Create Its Own Punch List
A manufacturer inspection can identify deficiencies that were not included on the GC’s original punch list. Commercial roofing closeout guidance notes that the owner/consultant punch list and manufacturer inspection punch list can be separate processes. :contentReference[oaicite:3]{index=3}
Examples may include:
- Incomplete flashing terminations
- Seam deficiencies
- Loose or improperly installed fasteners
- Improper perimeter detailing
- Missing sealant
- Drain or penetration detailing issues
- Materials that do not match the approved system
- Damage to the installed membrane
The GC should put each manufacturer item into the project’s master deficiency-tracking system rather than allowing it to exist only in an email or inspection report.
6. Assign Every Deficiency to a Responsible Party
A useful warranty punch-list process includes:
| Field | Example |
|---|---|
| Location | Roof Area B, north parapet |
| Deficiency | Flashing termination requires correction |
| Responsible party | Roofing subcontractor |
| Required action | Correct per manufacturer detail |
| Due date | Before final closeout |
| Verification | GC/manufacturer representative |
| Status | Open / Corrected / Verified |
This prevents the common problem of having a manufacturer’s inspection report that identifies problems but no documented evidence that those problems were actually corrected.
7. Verify That the Installed Roof Matches the Approved System
The GC should compare the final installation against the approved roofing submittals before the manufacturer inspection.
Check:
- Membrane manufacturer and product
- Membrane thickness
- Insulation type and thickness
- Cover board
- Adhesives
- Fasteners and plates
- Attachment method
- Flashing materials
- Edge-metal system
- Penetration details
- Drainage components
- Approved alternates or substitutions
This is especially important if the project went through value engineering or field substitutions. The roof that gets inspected should correspond to the system that was actually approved for the project and warranty.
For Florida work, the GC should also verify applicable product-approval information where required rather than assuming that approval of one roofing assembly automatically covers a different configuration.
8. Confirm the Warranty Type Before Closeout
Do not simply ask for “the roof warranty.”
The GC should confirm exactly what warranty the project requires and what the manufacturer is actually issuing.
Important items include:
- Warranty type
- Warranty duration
- Covered roof areas
- Warranty start date
- Warranty number
- Named owner or insured entity
- Building address
- Roof-system description
- Coverage limitations
- Maintenance requirements
- Inspection requirements
- Transfer provisions
- Exclusions
NRCA notes that manufacturer warranties and contractor workmanship warranties are different documents with different scopes. The manufacturer warranty generally concerns the manufacturer’s stated coverage, while the contractor’s workmanship warranty addresses installation-related obligations according to its terms. :contentReference[oaicite:4]{index=4}
9. Do Not Assume a Long Warranty Means a Leak-Free Roof
The warranty should not be treated as a substitute for proper roof design, installation and maintenance.
NRCA specifically cautions that the length of a roof-system warranty should not be the primary criterion for selecting a roof system and that warranty documents can contain significant restrictions and exclusions. :contentReference[oaicite:5]{index=5}
For the GC, this means the project should still have strong quality-control procedures even when the manufacturer offers a long-term system warranty.
10. Make Sure the Warranty Is Actually Issued
One of the most important closeout checks is distinguishing between “warranty requested” and “warranty issued.”
The GC should collect the executed warranty document and verify:
- Correct project name
- Correct building address
- Correct owner/legal entity
- Correct roof areas
- Correct system
- Correct warranty term
- Correct effective date
- Manufacturer approval or signature where applicable
- Warranty number or identifying information
- Any required inspection documentation
Florida roofing project documentation can specifically require the manufacturer’s final inspection to be submitted before issuance of the manufacturer’s warranty. A Florida Building Commission research report provides an example of this type of project specification requirement. :contentReference[oaicite:6]{index=6}
11. Coordinate Reinspection Before Final Payment
If the manufacturer identifies deficiencies, the GC should not consider the inspection process complete until the required corrections are verified.
The sequence should be:
- Manufacturer identifies deficiencies.
- GC logs the deficiencies.
- Roofing subcontractor performs corrections.
- GC verifies completion.
- Manufacturer performs reinspection or accepts documented correction where permitted.
- Final warranty documentation is issued.
- Warranty is included in the project closeout package.
Commercial roofing inspection guidance similarly identifies correction and subsequent verification as part of the post-construction inspection process. :contentReference[oaicite:7]{index=7}
12. Keep the Manufacturer Inspection Report With the Closeout Records
The final closeout package should contain more than the warranty certificate.
A strong roofing closeout file should include:
- Executed manufacturer warranty
- Roofing contractor workmanship warranty
- Manufacturer inspection report
- Manufacturer punch-list documentation
- Evidence of completed corrections
- Approved roofing submittals
- Product data
- Installation instructions
- Applicable product approvals
- Roof plans or as-built information
- Photographs
- Testing reports where applicable
- Maintenance requirements
- Roof access requirements
- Warranty contact information
NRCA’s roofing resources emphasize documenting the roofing scope, installation method, warranty requirements and related project information, while commercial closeout guidance recommends retaining the manufacturer’s field inspection report alongside the final warranty. :contentReference[oaicite:8]{index=8}
13. Manufacturer Inspection Does Not End the GC’s Responsibility
Once the warranty is issued, the GC should make sure the owner understands that warranty protection has conditions.
The closeout handoff should explain:
- Required maintenance
- Inspection frequency
- How to report leaks
- Who can perform roof repairs
- Restrictions on roof access
- Rules for future penetrations
- Rooftop equipment work
- Documentation requirements
- Warranty claim procedures
NRCA emphasizes that ongoing maintenance and documentation remain important after construction and that warranty coverage does not replace responsible roof maintenance. :contentReference[oaicite:9]{index=9}
14. GC Manufacturer Warranty Inspection Checklist
- ☐ Warranty type identified before construction
- ☐ Manufacturer inspection requirements reviewed
- ☐ Required intermediate inspections scheduled
- ☐ Final inspection included in project schedule
- ☐ Roofing contractor completed internal punch inspection
- ☐ Roof cleaned and accessible for inspection
- ☐ Flashings and penetrations reviewed
- ☐ Drains and drainage conditions reviewed
- ☐ Membrane seams checked
- ☐ Perimeter securement checked
- ☐ Installed assembly compared with approved submittals
- ☐ Manufacturer inspection report received
- ☐ Manufacturer deficiencies logged
- ☐ Corrections completed
- ☐ Reinspection or correction verification completed
- ☐ Executed warranty received
- ☐ Warranty details verified against contract requirements
- ☐ Manufacturer inspection report added to closeout package
- ☐ Owner receives warranty and maintenance requirements
Related Questions
- What is a warranty inspection at substantial completion?
- What manufacturer inspections occur during installation?
- What roofing closeout documents should a GC collect before turnover?
- How can a GC reduce roofing quality-control risk on a commercial project?
- What roofing submittals should a GC expect from a commercial roofing subcontractor?
- Does a commercial roof warranty cover damage caused by other trades on the roof?
Sources
- NRCA — Passing Inspection: What Do Warrantors Want?
- NRCA — Contract Provisions and Warranty Provisions
- NRCA — Roof System Warranties
- Florida Building Commission — Roofing Research Report
- Commercial Roofing Advisors — Roof Project Closeout Guide
Last Reviewed
September 25, 2026
Related Resources
- Warranty Inspection at Substantial Completion
- Manufacturer Inspections During Installation
- Commercial Roofing Closeout Documents
- Commercial Roofing Quality Control for GCs
Need help coordinating a manufacturer warranty inspection? Request Commercial Roofing Warranty Inspection & Closeout Support from ShieldLine Roofing.
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