St. Charles-Guillot v. One Source — Fifth Circuit affirmed summary judgment for roofing-materials supplier

Case
St. Charles-Guillot Investment, L.L.C.; Luling Living Center, L.L.C. v. One Source Roofing, Incorporated; Jasper Contractors, Incorporated; Roofclaim.com, L.L.C.; GAF Materials, L.L.C.
Court
U.S. Court of Appeals for the Fifth Circuit
Judge
Richman; Duncan; Oldham
Date Decided
September 1, 2026
Docket No.
25-30326
Topics
Negligence; Assumed Duty; Roofing Inspection; Summary Judgment
Source
Read the full opinion

Background

Luling Living Center hired One Source Roofing to replace the roof of its Louisiana nursing home. One Source purchased roofing materials from GAF Materials and requested a GAF guarantee covering certain leaks caused by manufacturing defects, ordinary wear and tear, or workmanship. Before issuing the guarantee, a GAF employee conducted a surface-level inspection to determine whether the roof met the guarantee’s minimum requirements. GAF had no contract or direct communications with Luling, which apparently did not know GAF had supplied the roofing materials until after litigation began.

Four months after installation, Hurricane Ida struck, and the roof allegedly detached because of defects in One Source’s installation, destroying the nursing home’s interior. Luling sued GAF and others, ultimately alleging that GAF’s inspector negligently failed to identify installation defects. The district court granted GAF summary judgment, holding that GAF owed Luling no duty and alternatively that GAF had not breached any duty. Luling appealed.

The Court’s Holding

The Fifth Circuit affirmed, holding under Louisiana law that GAF did not assume a duty to protect Luling from One Source’s faulty installation. Applying Louisiana’s assumed-duty framework, the court concluded that GAF’s involvement was minimal, its authority was limited to issuing or withholding its guarantee, and its inspection was intended only to determine whether the roof met the guarantee’s minimum requirements. GAF neither supervised the installation nor possessed authority to require One Source to correct defects.

The court rejected Luling’s argument that GAF undertook a broader obligation to discover code violations or hidden installation defects. GAF’s general expectation that contractors follow building codes and its inspector’s identification of one visible hollow spot did not expand the inspection into a comprehensive safety review. The cases cited by Luling involved materially greater supervision, direct safety undertakings, affirmative recommendations, or contractual authority over installation. Because GAF assumed no relevant duty, the court did not reach GAF’s alternative argument that it had not breached a duty.

Key Takeaways

  • Under Louisiana law, an assumed duty depends on the scope of the defendant’s involvement, the extent of its authority, and its underlying intent.
  • A limited warranty inspection does not create a broad duty to uncover hidden installation defects when the supplier neither supervises the contractor nor has authority to compel repairs.
  • Mere safety concerns, nonbinding recommendations, or minimal contact are insufficient to establish an assumed duty to protect a third party.

Why It Matters

The decision limits the potential negligence exposure of product suppliers and warranty issuers whose inspections serve a narrow warranty-related purpose. A supplier does not necessarily become responsible for a contractor’s defective work merely by inspecting the finished project or identifying a visible deficiency.

For property owners seeking to establish an assumed duty, evidence of direct assurances, comprehensive inspection commitments, supervisory involvement, or authority to require corrective work may be critical. Absent those facts, Louisiana courts are unlikely to convert a limited warranty inspection into a general obligation to certify a project’s safety or structural soundness.

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