Precision Roofing in Action: A Technical Look at the T&E Flow Services Project

When commercial roofing projects fail, it’s rarely because of a single material choice—it’s usually the result of shortcuts in preparation, fastening strategy, or perimeter detailing. At Graystone Construction, every system is approached as an integrated assembly, designed to perform as a whole under real-world conditions.

The T&E Flow Services facility in Oklahoma City presented exactly the kind of challenge where experience and technical discipline matter.

Project Overview

• Project: T&E Flow Services

• Location: 1740 W Main St, Oklahoma City, OK

• Client: T&E Services

• Scope: Full tear-off and installation of a new mechanically fastened TPO roofing system

Step 1: Complete Roof System Removal — Starting with a Clean Slate

The existing roof assembly included:

• 3–5 inches of SPF (spray polyurethane foam) with coating

• 2.5 inches of built-up gravel roofing

Rather than attempting partial remediation, Graystone executed a full tear-off. This decision is critical in long-term performance: removing legacy materials allows the new system to bond, fasten, and perform exactly as engineered—without unknown variables trapped below.

Why this matters:

Old SPF and gravel systems often hide moisture intrusion, compression damage, or inconsistent substrates. Leaving them in place compromises fastener pull-out resistance and thermal performance.

Step 2: Insulation Strategy — Thermal Performance Meets Structural Control

Once the deck was properly prepared, the new insulation assembly was installed:

• 4.5 inches of mechanically fastened ISO board

This thickness wasn’t arbitrary. It was selected to:

• Improve R-value and energy efficiency

• Create a stable, uniform substrate for the membrane

• Reduce long-term deflection and fastener fatigue

Mechanical fastening ensures positive attachment to the structure while allowing controlled movement—an important factor in large commercial roofs exposed to temperature swings.

Step 3: Membrane Installation — Mechanically Fastened TPO

The primary membrane system consists of a mechanically fastened TPO roof, selected for its durability, reflectivity, and serviceability.

Mechanical attachment provides:

• Proven wind-uplift resistance

• Ease of future maintenance or phased roof work

• Reliable performance in large-format commercial facilities

This approach also aligns well with facilities that may expand or modify rooftop equipment over time.

Step 4: Perimeter Engineering — Where Roofs Win or Fail

Perimeters and corners are the most vulnerable zones on any commercial roof—especially in high-wind regions. Graystone addressed this head-on:

• All perimeters were doubled

• Outside perimeter zones were fully adhered

This hybrid approach significantly increases resistance to uplift forces while maintaining system flexibility across the field of the roof.

Why this detail is critical:

Most roof failures initiate at the edges—not the center. Proper perimeter reinforcement is one of the clearest indicators of a contractor who builds for longevity, not shortcuts.

Built for Performance, Not Just Installation

This project isn’t just a new roof—it’s a purpose-built roofing system, engineered to withstand uplift, thermal cycling, and long-term operational demands.

At Graystone, quality roofing is defined by:

• Thoughtful system selection

• Disciplined installation methods

• Relentless attention to high-risk details

The T&E Flow Services project is a clear example of how technical execution translates directly into durability, efficiency, and peace of mind for building owners.