Full-system tear-off and replacement on Memphis commercial flat roofs - scoped against your capital horizon and closed out with manufacturer warranty documentation that holds up over time.
Most commercial roof replacements in the Memphis metro get scoped reactively. The roof leaks, someone calls three contractors, and the lowest bid wins. That replacement runs the same membrane on the same insulation against the same parapet detailing - and then leaks again in eighteen months. We do not work that way.
Our replacement scope starts with a roof walk and moisture-core pulls on any roof we suspect has saturated insulation. Memphis's 54-inch annual rainfall and high-humidity summers - average July dewpoint of 70°F - accelerate insulation saturation in ways that drier climates do not see. We document deck condition, parapet flashing condition, drain status, every penetration, and every prior repair. The replacement scope then specifies the membrane, the insulation stack (including R-value to current Tennessee energy code), the fastener density to code wind-uplift, the manufacturer warranty path, and the maintenance contract that keeps the warranty active.
When Replacement Is the Right Call
Recover-versus-replace is the first decision in any aging-roof scope. We pull moisture cores in five-to-ten representative locations on roofs we suspect have insulation saturation. Memphis's humid subtropical climate means wet insulation is far more common here than in arid markets - we find saturated insulation on roughly 40% of Memphis roofs we core that are over 15 years old. If more than 25% of cores read wet, replacement is the honest scope - recovering wet insulation traps the moisture and voids the new warranty. If under 25%, a recover with targeted insulation replacement at wet areas can extend the asset another 15-20 years at roughly half the capital cost of full replacement.
Deck condition is the second decision. We pull deck inspection ports under wet cores and at obvious deflection points. The Mississippi River alluvial plain under most of Memphis is composed of silty clay loam that expands and contracts seasonally - this drives structural movement that shows up as deck deflection, parapet separation, and drain-to-deck joint failures. Corroded metal deck or rotted plywood means deck replacement, which moves the project into a different cost band. Owners need to know this before the project starts - not when the crew opens up the roof and stops work.
What the Replacement Scope Specifies
Membrane: TPO 60-mil or 80-mil for most Memphis commercial buildings; EPDM 60-mil for industrial facilities with heavy mechanical traffic; PVC 50-mil or 60-mil for restaurant and high-chemical-exposure buildings; modified bitumen for buildings with existing BUR systems where the recover path makes economic sense. We are not married to any one manufacturer - we specify based on building use, manufacturer warranty terms, and what the building's capital horizon supports.
Insulation: We spec to current Tennessee energy code (IECC 2021 minimum R-25 for low-slope, often higher for conditioned spaces). Memphis's high cooling loads mean the insulation stack matters beyond code minimum - reducing heat transfer through the roof reduces HVAC loads on buildings that are already running high-tonnage units through a long humid summer. Tapered insulation packages are designed against the existing drain layout and the actual ponding patterns we documented during inspection.
Fastener pattern: Designed against IBC 2021 wind-uplift requirements for the building's zone and exposure category. Memphis is mostly Exposure B; high-rise buildings, buildings near the river bluffs, or those on open lots get more conservative pattern density. The Aerotropolis zone around MEM airport gets special attention - cargo facilities experience elevated wind exposure from aircraft operations and the flat terrain west of the airport.
How We Sequence the Project
Pre-construction: Permits filed with the relevant municipality (City of Memphis, Germantown, Bartlett, Collierville), pre-job meeting with the building's facility manager to set crane and material lay-down zones, tenant notification distributed, parking and ingress/egress impact documented. Memphis permit timelines vary significantly between City of Memphis (2-4 weeks) and the suburban municipalities (typically 5-10 business days).
Production: Tear-off staged in 5,000-10,000 sq ft sections with same-day dry-in on each section, so the building is never exposed to an unannounced rain event. Memphis's wet-spring pattern (March-May averaging 14+ inches total) means rain risk planning is real - we schedule production windows around forecast windows and have emergency dry-in materials staged on every active project.
Closeout: Punch walk with the building's facility manager and our project manager, manufacturer warranty inspection with the manufacturer's field rep, closeout package delivered (warranty document, photo-keyed zone diagram, maintenance contract, manufacturer's start-up documentation).
