Roofing Where the Building Never Goes Offline
Aviation facilities throw out the standard commercial roofing timeline. An operating airport runs around the clock, every access point and material lift has to be cleared with the facilities department and airfield operations, and on the airside nothing moves without badging and, in places, TSA coordination. We build that coordination into the scope before the contract is signed rather than discovering the constraints after the crew shows up. The roof systems themselves also carry demands a comparable warehouse never sees, and we design for those up front.
The Seattle region is one of the densest aviation markets in the country. Seattle-Tacoma International Airport (SEA) is the primary hub for Alaska Airlines and one of the Pacific Northwest's busiest international gateways, and it is in the middle of a multi-year capital program under the Sustainable Airport Master Plan. King County International Airport, better known as Boeing Field (BFI), handles Boeing flight-test operations, a major cargo presence, and a large maintenance, repair, and overhaul campus immediately south of the city. Paine Field (PAE) in Everett anchors Boeing's widebody final assembly and offers limited commercial passenger service. Those three sites alone create distinct terminal, hangar, cargo, and support-building roofing markets, all of them under the region's persistent rain and the moss pressure that comes with it.
Terminal Decks Are Big, Flat, and Unforgiving on Drainage
Terminal roofs tend to be long, low-slope expanses with minimal pitch, which puts drainage design at the center of the job and leaves almost no tolerance for ponding. Over occupied gate areas, ticketing halls, and baggage systems, standing water is both a leak risk and a structural load we will not accept. We correct slope with tapered insulation, design the drainage and overflow capacity for real storm events, and verify the existing deck and its load capacity before settling on an assembly. Most terminal reroofing in the region uses a TPO or PVC single-ply membrane over tapered insulation; the exact selection follows from the deck, the loads, and the operational constraints we find during a walk with the facilities engineer.
Jet Blast, Wind, and Heavy Mechanical Loads
Airside roofs see exposure that ordinary commercial membranes are not specified for. Jet blast and high open-field wind drive the adhesion and ballast requirements well beyond what a sheltered logistics roof needs, and we specify attachment for those loads rather than a standard pattern. Terminal mechanical systems are also denser and heavier than typical commercial, which means more curbed penetrations and more flashing detail per square foot. We document every curb, oversized unit, and through-penetration in a preconstruction survey and engineer each flashing detail individually.
The Whole Campus Is Aviation, Not Just the Terminal
The airport coordination requirement does not stop at the terminal door. Cargo buildings, rental-car centers, fixed-base operator hangars, aircraft maintenance facilities, and on-campus hotels all sit inside the airport's access and security environment. Our crews treat badging and airfield coordination at any point on the campus as a baseline requirement, planned into the schedule from the start. We do not put crew members on a campus roof without confirmed authorization, and we factor that credentialing time into the bid timeline.
Hangars and General Aviation
At fixed-base operators, private hangars, and reliever-airport structures, the security protocols are lighter but the buildings are often more demanding to roof. High-bay hangars with wide-flange steel or pre-engineered metal building systems generate significant wind-uplift and thermal-movement loads, and they call for specific fastening patterns and seam geometry. Standing seam metal is frequently the right answer on new high-bay structures, and we specify and install those systems across the Seattle area and throughout the state.
Coordinating With Airport Authorities and Tenants
Depending on the building, the decision-maker might be the airport authority's facilities group, a Part 139 operations coordinator, an airline or cargo tenant, or a private hangar owner. We work with each of them to develop a phased plan approved by airport operations, schedule material deliveries and crane lifts into approved windows, and coordinate with the FAA NOTAM process when the work requires it. The closeout package is built to match what aviation owners expect, from permit and inspection records to manufacturer warranty registration and a roof zone diagram for the facility's asset file.
Airport & Aviation Roofing Questions
How do you schedule work at an operating airport like Sea-Tac?
We work with the airport facilities department and the Part 139 coordinator to develop a phased plan approved by airport operations. Material deliveries, crane lifts, and any work near airside areas go into approved windows and are coordinated with the FAA NOTAM process where required. This is standard project setup for us, not an exception.
What roof systems are standard for large terminal decks?
Most terminal reroofing in the region uses a TPO or PVC single-ply membrane over a tapered insulation system that improves drainage and addresses ponding. New high-bay aviation structures and hangars are often specified in standing seam metal. The selection depends on the existing deck, load capacity, and operational constraints, which we assess on a walk with your facilities engineer.
How do you handle the density of terminal HVAC penetrations?
Terminal mechanical density is well above standard commercial. Our preconstruction survey documents every penetration, curb height, and mechanical clearance before we build the work plan, and flashing details for oversized curbs and complex penetrations are engineered individually rather than using standard patterns.
Can you work on airside structures near active runways?
Yes, with appropriate badging and in full coordination with airfield operations. Airside work requires additional preplanning and crew credentialing, which we build into the bid timeline. We do not mobilize crew without confirmed airside authorization.
Do you handle hangar roofing for FBOs and general aviation?
Yes. General aviation hangar roofing, from a single-bay private hangar to a multi-unit FBO complex, is a regular part of our commercial work in the Seattle area. High-bay hangars with wide-flange steel or pre-engineered systems need contractors who understand their uplift and thermal-movement behavior, and we do.