Military Hangar and Maintenance Facility Roofing in the Dearborn, MI Area
Selfridge Air National Guard Base hosts Hangar 1416, home to a Michigan Army National Guard CH-47 Chinook unit; the 127th Wing describes maintenance and weather-protection functions there, in a building of roughly 132,000 square feet that keeps the unit's aircraft together. That combination of repair work and shelter is what makes a hangar roof unlike a warehouse roof. Water that enters above an aircraft in maintenance can ruin a work schedule even when the roof leak itself is small.
Selfridge lies about 26 miles northeast of Dearborn, MI. The floor area of a building says nothing about its roof assembly, so we start by finding out what the roof is made of, how it drains and where it has been repaired. Then we work out how much of it can be opened to the weather at one time.
Weather Protection as the Roof's Real Job
The account of Hangar 1416 uses the phrase weather protection for a reason. A maintenance hangar is a place where engines, avionics and airframes are worked on, and moisture, dust and debris from a failing roof can reach every one of those systems. A roof that merely sheds rain is not enough; it has to avoid dripping condensation, shedding grit or admitting windblown snow through damaged edge metal.
Those requirements shift the inspection. We check for interior stains, mineral granules or membrane fragments in gutters, and loose fasteners that could drop below. The inspection of an aircraft hangar roof covers the deck, the insulation, the membrane or metal panel above it and the connections between the hangar bay and its attached shops. Findings are written with a location for each item, so the maintenance crew can see which bay is affected.
Long Spans, Wind Uplift and Perimeter Failure
Wide, flat roofs on tall buildings feel the wind more than small ones, because uplift concentrates at corners and edges. On a membrane roof the edge termination and the fasteners or adhesive behind it do most of the resisting. On a metal roof the clips, seams and panel ends do the same job. When one of those pulls loose, the damage spreads along the roof edge in the direction of the wind.
Southeast Michigan took damaging wind, large hail and tornadoes in September 2026, as the NWS documented, with an EF-0 touching down in Lincoln Park and an EF-2 in Detroit. Storm weeks like that are the right time to check coping, gravel stop and panel fasteners. We carry out a wind damage repair assessment with photographs of each loose edge and a mark on the roof plan where tightening, replacement or resealing is required.
Roof Work Around Aircraft and Tooling
A hangar roof job begins with a list of what is below: aircraft, tooling, test equipment and the paths that crews and tugs use. Protection under the work area may include netting, plywood or a suspended ceiling cover, and the choice depends on how much debris the tear-off creates. We also identify any fire-suppression piping, lighting or crane rails attached to the structure so the roofing crew does not load or cut them.
Installations add base entry and escort rules, and federal roof specifications generally refer back to the UFC for roofing. The sequence is agreed with the facility contact in advance: which bay is open, which aircraft will be moved, and when the crew must leave the roof. That is the discipline of occupied building reroofing carried into an environment where the occupants are aircraft.
Patching Versus Sectional Replacement
Because a hangar cannot always be emptied, a repair that works one bay at a time is often the practical path. If infrared and core readings show that wet insulation is confined to a few areas, a sectional replacement removes the wet material and ties the new membrane into the sound sheet around it. The tie-in is the weak point, so we inspect it after the first heavy rain.
When the roof is metal, repairs concentrate on laps, fasteners and sealant, and sometimes a retrofit panel over the old one. A metal roof retrofit avoids tear-off above the aircraft, which is a major advantage in a hangar. Every option has tradeoffs: added weight on the structure, a different thermal behavior, and a new set of flashing details. We lay those out in writing so the maintenance officer chooses with the whole picture.
Staging a Full Replacement by Bay
Full replacement of a hangar roof is a sequence of small projects. We divide the roof along its structural bays, replace each in a day or two, and close each in before moving on. This keeps the exposed area small, so a sudden storm affects a section, not the whole building. Material is staged on the roof in controlled amounts, never left out overnight.
Design choices should be made early. Drainage on a roof this large needs enough sumps and overflow paths that a single blocked drain does not flood a section. Insulation thickness and cover board determine heat loss and wind resistance. We price each separately, and record the decisions in a roof condition report that the facility team can use for later reviews.
Keeping a Hangar Roof Dry Between Projects
Debris in a gutter or sump is the least costly problem to solve and the most common cause of ponding. We recommend a walk in early November, ahead of the typical mid-November first snow, and again in April once the last snow has gone. Each visit includes a drain flush, a fastener check on edge metal and a note of any new penetration. An air station with its own hangar, like a Coast Guard station, benefits from the same routine.
Commercial Roofing Questions
How do you protect aircraft and tooling during roof work?
We stage the work in small areas and place netting, plywood or a suspended cover under the area being opened. The facility contact marks which aircraft will be moved and which stay put. Material and tools are kept on the roof in controlled amounts so nothing is left unsecured at the end of a shift.
Is a retrofit metal panel a good idea over an existing hangar roof?
It can be, because it avoids tearing off the old roof above the work area. The structure must carry the added weight, and the new panel needs flashing details that match the penetrations. An engineer's review of the framing is the first step, and we report any limits we see during the roof inspection.
Why does wet insulation matter more in a maintenance hangar?
Water in insulation can travel to a seam or fastener and drip into a work area weeks later. It also adds weight and loses insulating value. An infrared and moisture survey maps where the wet area ends, so the replacement section can be sized to the problem.
What happens if a storm opens the roof during a maintenance shift?
We provide emergency response around the clock, holidays included. First comes temporary protection over the opening, such as a tarp or temporary patch, then a check of the surrounding membrane and edge metal. The permanent repair is scoped from the photographs and moisture readings taken that day.
Can a hangar roof keep its warranty after a repair?
That depends on the manufacturer's terms for the installed system, which we read before repair begins. Some warranties require approved materials or an approved installer for repairs. We document the work and send the manufacturer's required forms so the owner can keep a complete file.
Call for a Hangar Roof Inspection or Emergency Response
Contact Commercial Roofing Dearborn to schedule an inspection of a hangar or maintenance facility roof, or to request emergency response when water is entering. We will document the membrane or panels, drainage and moisture, then provide written findings for a repair, phased replacement or monitoring plan.
