A warehouse roof is mostly one thing: a lot of flat area with not much interrupting it. Getting that field right, especially the drainage, matters more on a warehouse than almost any other building type we work on.
Warehouse buildings around the I-64 and I-69 interchanges tend to be big single-span structures with internal drains rather than gutters, which means the roof's slope design carries the whole burden of moving water off before it ponds. We've inspected warehouse roofs in this market where a low spot the size of a car held water for days after a storm because the original tapered insulation layout was never adjusted after a roof-mounted solar array or a new HVAC curb changed the drainage path.
Any time equipment gets added to a warehouse roof after the original build, we check that it hasn't created a new low point. It's a five-minute check during an inspection that prevents a much longer conversation about deck rot two years later.
Warehouse tenants change their storage strategy more often than the building itself changes hands. High-density racking and ESFR sprinkler retrofits both add weight and, in the case of sprinkler work, add roof penetrations that weren't part of the original design. We coordinate closely with fire protection contractors doing ESFR upgrades so sprinkler head penetrations through the roof deck get flashed properly instead of just caulked around the pipe.
TPO is our default for new warehouse roofs and full re-roofs in this market. The white membrane keeps rooftop temperatures down, which matters for HVAC load in buildings that often run minimal conditioning, and the sheet width on a large open field means fewer seams than older built-up systems.
Warehouse roofs see less foot traffic than manufacturing roofs day to day, but when maintenance does happen, it tends to be concentrated: HVAC service, dock leveler maintenance near the building edge, or fire protection inspections that route techs across the whole field. We lay out walk pads to the units and access points that actually get used rather than a generic grid, based on a walk-through with the building's maintenance team before install.
Loading dock canopies and edge details take more wear than people expect on a warehouse, mostly from truck traffic vibration and exhaust exposure right below the roofline. We inspect those edges separately from the main field on every warehouse roof survey.
A warehouse roof in this market sees real seasonal swings: summer UV exposure pushing membrane surface temperatures well above ambient, followed by winter snow and ice loading that a large flat field has to shed evenly rather than pile up around a parapet or rooftop unit. We check parapet wall flashing and snow guard placement near HVAC curbs specifically, since drift patterns around rooftop equipment are where we see ice dams form first on an otherwise flat roof.
Wind uplift matters more on a large-footprint warehouse than a smaller building, simply because there's more roof area for wind to grab at the corners and perimeter. We follow the fastening pattern the membrane manufacturer specifies for corner and perimeter zones rather than using a uniform field pattern across the whole roof, a detail that gets skipped on cheaper installs.
Warehouse roofs in this market commonly carry polycarbonate skylights or smoke vents for daylighting and code-required smoke evacuation, and those units age differently than the surrounding membrane, with UV yellowing and gasket failure showing up well before the field membrane needs attention. We inspect skylight curbs and gaskets on their own schedule rather than lumping them into a general roof walk.
A cracked or yellowed skylight panel is more than a cosmetic issue, it's a leak point and, in some cases, a fall hazard for anyone walking the roof without knowing where the weak panels are. We mark skylight locations clearly for any maintenance crew working the roof afterward.
A post-storm walk within 48 hours of a heavy rain shows exactly where water is sitting longer than it should. We mark those spots and monitor them against the tapered insulation plan.
Not directly through the deck in most cases, but if racking changes where forklifts and material handling equipment concentrate weight near columns, it's worth a structural check alongside the roof review.
TPO systems in this climate generally run in the range most manufacturers warranty for, with actual field life depending heavily on foot traffic control and how quickly small punctures get caught and patched.
Yes, if the membrane is early enough in its life cycle. We'd rather plan penetrations for future solar at install than retrofit them into a roof that's already ten years in.
That transition is usually where we find the most flashing problems on inspections, since it's a change in roof height and often a change in system type. We treat it as its own detail, not an afterthought.