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Aircraft Hangar Roofing near South Fulton, GA
A hangar is mostly roof. The walls hold the door and the span. The roof is the long, clear volume above the aircraft. That volume is the point of the building, and anything that wets it is a problem. Near South Fulton, GA, the roof faces long humid summers and thunderstorm wind in every month. Work on a hangar starts with the span, the door and the equipment hanging from the structure, not with the membrane.
Building use: aircraft bays, shops and fire suppression
An aviation building holds aircraft, tools, fuel-handling gear and often overhead equipment. A hangar bay needs a wide clear span with no interior columns. Attached shops and offices have ordinary roofs at lower heights. Each puts a different use under its roof.
A leak over an aircraft is a damage event. A leak over avionics or electrical gear is worse. A drip over a floor with fuel handling is a safety event. The roof plan ranks every zone by what sits below it.
Many hangars have overhead fire suppression, lighting and crane rails hung from the structure. Any roof work near them is coordinated with the people who maintain those systems. We do not touch them.
Aviation sits within reach of South Fulton. The city places itself about 15 to 20 minutes by drive from Hartsfield-Jackson airport, and the development authority names aerospace-component work among local manufacturing strengths. Dobbins Air Reserve Base lies about 23 miles northwest, where the host airlift wing flies eight C-130H3 aircraft. A hangar roof there is read from its own drawings and a walk, never from the mission.
Roof mechanism: long spans, door loads and condensation
Long spans move. Steel framing expands in the afternoon heat and contracts at night. Heat reaches past 95°F in Atlanta on roughly seven days annually, and hangar steel answers every one of them. The roof deck and its fasteners work through that cycle. Seams in metal panels open. Sealant dries.
Wind is the second mechanism. The National Weather Service reports damaging thunderstorm winds in every month in its Peachtree City warning area, about 19 days a year on average. A hangar door that is open or poorly latched lets wind into the building. Internal pressure then pushes up on the roof from below. That raises uplift on the roof. Edge details and attachment matter more than usual.
Condensation is the third. A large metal roof over a conditioned space sweats when warm moist air meets cold metal. Drips from condensation look like a leak. A water test and a moisture reading tell them apart.
A seam repair on a metal panel uses new sealant, new fasteners and sometimes a cover strip.
Inspection findings: from the structure up
We start inside, with the structure and the underside of the deck. Staining, rust streaks and daylight at laps show where water enters. Then we go on the roof. Whole roof zone first, then ridge, edges, laps, penetrations and drains.
Typical findings: backed-out fasteners, open laps, cracked sealant, corroded panel edges, loose ridge cap, clogged gutters and failed flashing at skylights or vents. A drone pass helps on a wide roof. We confirm what it shows on the roof.
Where the roof is a membrane with insulation, an infrared moisture survey maps wet insulation. A test opening confirms the layers.
After storms, we repeat the walk and compare. NWS climatology reports large hail in its north and central Georgia warning area about seven days a year, with April the peak. Hail dents in metal show clearly in photographs. The report separates cosmetic dents from damage that affects water shedding.
Scope options: re-fasten, retrofit, replace
A re-fasten and reseal fixes metal roofs whose panels are sound. A metal roof retrofit adds a new system over the existing panels when the structure can carry it. Replacement applies where panels are corroded or the structure shows damage. Standing seam systems are common on wide metal roofs, and a standing seam metal roof suits long runs because it hides the fasteners.
Spans this wide mean heavy lifts. Crane time, laydown space and panel handling are separate cost lines. Interior protection over aircraft is another. Weather hold is a real line, since a long open section cannot be sealed fast.
Phasing is the norm. We replace a bay at a time, with a temporary seal at each end. A capital plan sets the order for a campus of hangars.
Access and sequencing: aircraft, fuel and flight schedules
Aircraft schedules set the work window. Aircraft are moved out of the bay under the work, or covered and protected. The operator decides. The access log records hangar door hours, who controls the ramp, fuel handling rules and escort needs.
Hot work is limited near fuel and aircraft. We use cold methods where possible. Any exception is reviewed with the operator in writing.
Each section is dried in by the end of the shift. That is the dry-in limit. No section stays open in a forecast storm. Staging sits off the ramp and away from taxi routes. Fall protection and lift positions are drawn on a site plan.
On a secure aviation site, badging and escort add lead time. We list the personnel and vehicle details early. An active leak gets an answer at any hour, holidays included. The first step is a safe dry-in, then the close-in limit. A military installation adds the Unified Facilities Criteria for roofing and gate procedures, the way any military installation roofing job does.
Code coordination: permits, fire protection and wind
Hangar roof permits in South Fulton fall under the 2024 International Building Code with Georgia Amendments, adopted by the city for the start of 2026. Energy review stays with the 2015 International Energy Conservation Code as the state amends it, and a full replacement is designed to meet both. A full replacement is designed to both. Fire protection codes govern suppression and detection inside the hangar, and those systems stay with their own trade.
Related building types share logic. Flex industrial roofing covers wide shops with offices, and the Fulton Industrial District, which the city calls one of the Southeast's largest industrial and business areas, borders South Fulton. Military hangars and maintenance buildings follow military hangar and maintenance facility roofing for access and specification.
Send us the hangar plans and the aircraft schedule
Why does a hangar roof need a different wind review?
Because the door can let wind inside. Internal pressure then pushes up on the roof from below, which adds to outside uplift. We check edge attachment, ridge and fasteners with that in mind. The review is part of the record.
How can a leak be told from condensation?
Check timing. A leak shows after rain. Condensation shows on warm humid days with no rain, and often on cold metal. A water test and a moisture reading settle it. The fixes differ, so the diagnosis comes first.
Can a hangar roof be replaced without moving every aircraft?
Often, by working a bay at a time. Aircraft in the work bay are moved or covered, and the rest stay. Each section is dried in daily, with a temporary seal at the ends. The operator approves the sequence.
What about fire suppression and lighting hung from the structure?
Those belong to their own trades. We do not touch them. We coordinate so roof work does not load, disturb or block them, and we record their position before work begins. The maintainer inspects them afterward.
Does a retrofit work over an old metal hangar roof?
If the structure can carry the added load and the old panels are sound enough to hold new framing. We check with a walk, a load review and a look underneath. If any check fails, replacement is the answer.