Commercial Roofing in St. Louis

Every component goes on to manufacturer specification, since that is what keeps the material warranty valid. Nailing and underlayment shortcuts void coverage, and years later the homeowner is left holding the problem.

Most commercial roofs in this metro are low-slope membrane, and most of the ones we get called to are not failing across the whole field. They are failing at the details: seams, terminations, drains, and the curbs under rooftop equipment. That distinction decides whether an owner is looking at a repair program or a capital replacement, and it is worth settling before anybody writes a number.

Ponding is the first thing we check. Water standing more than about forty-eight hours after rain means the slope or the drainage is not doing its job, and standing water finds every marginal seam eventually. Sometimes that is a clogged drain or a crushed scupper. Sometimes it needs tapered insulation to build slope into a deck that never had any.

Rooftop equipment is the other usual suspect. HVAC units get installed, serviced and replaced by trades who are not roofers, and curbs get cut, penetrated and flashed by whoever happened to be on site that day. We see a lot of membrane opened for a condensate line or a gas run and closed up with sealant. Those hold for about a season.

Membrane choice follows the building. Single-ply TPO and PVC cover most of what we do, heat-welded at the seams with proper terminations at every edge, curb and penetration. Modified bitumen goes where heat welding is impractical or where the existing assembly calls for it. PVC has the advantage wherever there is grease or chemical exhaust, a restaurant or a plant, because TPO does not tolerate that well over time.

Scheduling is the part that matters to an owner. Work gets phased around operating hours, deliveries staged so the lot stays usable, and sections opened only as far as they can be dried in the same day. In multi-tenant buildings we sequence by tenant so nobody loses access without notice.

Budget cycles are real and pretending otherwise helps nobody. Where a full replacement does not fit this year, we will scope it in phases across budget years, in an order that spends the money on the sections actually leaking, and put a maintenance program on the rest so the deferred half does not turn into an emergency in the meantime.