Third Party Quality Inspection in Oklahoma City, OK.

What We Inspect and How

Seam integrity: We run a probe test on a representative sample of heat-welded seams — minimum one probe test per 500 linear feet of seam, plus every seam within 12 inches of a penetration flashing, every seam within a flashing transition zone, and every T-junction. Probe testing detects cold welds that pass visual inspection. On a 75,000 sq ft TPO installation, we typically test 600-900 linear feet of seam.

Wind-uplift fastener pattern: For mechanically attached systems — the most common specification on Oklahoma City commercial buildings above 50,000 sq ft — we verify fastener spacing at the field, perimeter, and corner zones against the approved wind-uplift design. Oklahoma buildings in ASCE 7-22 Exposure C conditions (open terrain, airport-adjacent, elevated sites) require substantially higher fastener density at perimeters and corners than sheltered downtown buildings. Pattern errors at corner zones are the single most common wind-uplift finding on OKC QA inspections.

Flashing details: Parapet walls, penetrations, drains, curbs, expansion joints, and edge metal — we photograph each detail against the manufacturer's published detail drawing. Oklahoma City's clay-soil movement creates above-average failure risk at expansion joints and parapet-to-deck transitions. We focus additional attention at these locations and document any flashing dimension shortfalls that would fail the manufacturer's warranty inspection.

Insulation and cover board: Where accessible at penetrations, drains, or inspection ports, we verify that the insulation stack matches the specification — polyiso type and thickness, cover board type (HD vs. standard density), and fastener pattern through the insulation. An HD cover board substituted with standard density costs less than the HD specification and produces an installation that does not qualify for FM impact-resistance ratings or the Oklahoma insurance premium discount that comes with them.

Manufacturer Warranty Inspection Support

Oklahoma City manufacturer NDL warranty inspections are performed by the manufacturer's own field representative or factory-credentialed inspector. These inspections produce a punch list of conditions that must be corrected before the warranty is issued. The punch list correction window varies by manufacturer — typically 30 to 90 days after the inspection.

We support owners and general contractors through manufacturer warranty inspections two ways: before the manufacturer inspection, we walk the roof and identify the conditions most likely to generate punch-list items so the installing contractor can correct them before the manufacturer's inspector arrives; after a punch-list is issued, we scope the remediation, complete the corrective work as the credentialed applicator, and submit completion documentation to the manufacturer's warranty desk within their required window.

The pre-inspection walk is particularly valuable on Oklahoma City projects because the conditions manufacturers flag most often in this market — parapet flashing dimension shortfalls, drain ring torque loss, corner-zone fastener pattern deviation, and post-hail cover board compression — are detectable before the manufacturer inspection and correctable in a day of crew time. Finding them first shortens the punch list and accelerates warranty issuance.

Report Format and Delivery

Every third-party QA inspection delivers a written report within five business days of the field visit. The report includes: an executive summary with overall assessment and count of findings by category (warranty-jeopardizing, specification deviation, observation), a roof zone diagram with findings keyed by number, a finding-by-finding detail section (photograph, location description, applicable specification or manufacturer requirement reference, recommended corrective action), and a findings matrix formatted as a spreadsheet sortable by zone, category, and priority.

The findings matrix is designed to work as a contractor correction-required list — the installing contractor can pull it, assign items, and return completion documentation for each item. For owners seeking manufacturer warranty inspection support, the same report serves as the basis for the pre-inspection correction scope.

Frequently asked questions

Can you inspect a roof installation that is already complete?

Yes, with reduced utility. The highest-value inspection window is during installation — while seams and flashings are accessible for probing and while fastener pattern verification can be done without destructive investigation. Post-completion inspection can still surface visible deficiencies and test exposed seams, but conditions under a completed membrane or covered flashing cannot be assessed without opening the roof.

Do you share findings with the installing contractor?

That is the owner's or general contractor's decision. We deliver the report to whoever retained us. They decide whether to share it directly with the installing contractor, use it as the basis for a written correction-required notice, or hold it for manufacturer warranty inspection support. We do not communicate findings to the installing contractor without authorization from the party who retained us.

What qualifies your inspectors to conduct manufacturer warranty inspection support?

Our project managers hold active manufacturer credentials with GAF, Carlisle, Johns Manville, Sika Sarnafil, and Firestone. We have participated in manufacturer warranty inspections as the credentialed applicator in the OKC market and know each manufacturer's published installation standards, flashing detail requirements, and the conditions their inspectors flag most often in Oklahoma's climate.

How long does a QA inspection take on a 100,000 sq ft OKC commercial roof?

Full seam probe, flashing detail documentation, fastener pattern verification at field, perimeter, and corner zones, and zone-by-zone photographic documentation: approximately one full day on-site for a 100,000 sq ft roof. Roofs with high equipment density, multiple roof levels, or complex layouts take longer. We provide a time estimate after reviewing project documentation before we schedule.

Next Step

Need an independent QA inspection on an Oklahoma City commercial roof installation?

We will walk the installation, probe seams, verify wind-uplift fastener patterns and flashing details against the manufacturer's standard, and deliver a written report the installing contractor can work from before warranty inspection.

Request a QA Inspection →