Aircraft Hangar Roofing in Brockton, MA
A hangar leak is not a drip. It is a sheet of water falling from a high ceiling onto an aircraft. Owners blame the roof deck or the age of the building. The real cause is usually at the edges: a door header seal, a wall joint, a roof curb or a purlin line where panels meet.
Aircraft hangar roofing near Brockton, MA has a different scale from a store or an office. Spans are long. Walls are tall. Doors are huge. Contents are costly, and fuel and fire rules apply. Brockton sees about 34 inches of snow a year and wind that holds near 14.3 mph. A hangar roof catches both on a wide, flat or arched surface. We find the failing detail, rank it by risk to what sits underneath and plan the work so nothing under it gets hurt.
Start With the Span, Not the Stain
A stain on a hangar floor tells you where water landed. It does not tell you where it came in. Wide roofs carry water a long way along purlins, deck flutes and insulation joints. We start by mapping the roof in sections, then walking each section against the interior marks.
Check the usual suspects. Panel laps and fasteners on a metal roof. Seams and flashings on a membrane roof. Skylights and ridge vents. Curbs for exhaust, heat and fire systems. Every penetration is a possible entry. A roof this size can have dozens.
Each suspect gets its own hose test, one at a time. When the leak shows, we mark it. That is how a roof with fifty defects gets reduced to the three that matter. The photo record shows which ones leak now, which ones are close and which are sound. Skylight domes and smoke vents, if the building has them, get a close look, since glazing seals dry out and crack long before a metal panel does.
Check the Door Headers and Wall Joints
Large hangar doors hang from a header. The header meets the roof at one end and the wall at the other. That joint moves with wind, snow load and temperature. It is also where flashing and seals wear out. A bad header seal lets rain blow straight onto the floor.
We check the flashing above the door, the seal along the track and the transition between wall panels and roof edge. We also check the corners, where two walls and a roof meet. Corners are the worst place for a failed seal because water runs down both walls and meets at the bottom.
Repairs here are not caulk jobs. They involve new flashing, counterflashing, closure strips and sealant rated for movement. A wind damage repair after a storm starts at these joints, because gusts load a door header more than any other point.
Keep Fuel, Sparks and Debris Out of the Work
Hangars hold aircraft, fuel and sometimes hot equipment. Roofing work near them needs rules. No open flame near fuel areas. Cold-applied adhesives and mechanical fastening instead of torches. Hot work permits and a fire watch if heat is unavoidable. Our crew follows the owner's safety program and adds a plan of its own.
Debris matters too. Loose fasteners, offcuts and grit can blow onto aprons and into engine intakes. The ramp needs to stay clean. We use magnetic sweepers, bag all waste and keep staging away from taxi lanes. Each day ends with a sweep of the ground below the roof.
Aircraft below the work get covered, moved or protected. The owner decides which. Tooling, parts carts and fuel carts get the same question. We list what sits under each roof zone before the first panel is opened. We never roof over an exposed aircraft without a cover plan the owner approves.
Plan for Snow Load on a Long Clear Span
Brockton's heaviest snow comes in February, at about 12.8 inches. A hangar roof has no interior columns to share the load. Drifts form against parapets and rooftop equipment. Meltwater refreezes at the eaves. A roof that holds ponded water adds weight on top of snow.
We check the deck for deflection, the drains for blockage and the eaves for ice dams. Ponding on a wide roof is a structure question as well as a leak question. If low spots collect water, we log them and talk to the owner's engineer. An infrared moisture survey shows where insulation has gotten wet and heavy.
Wind and nor'easters hit large surfaces hard. Uplift loads rise at corners and eaves. Edge metal, fastener spacing and panel clips are checked first.
Treat Reused Airfield Buildings as Unknowns
Union Point, planned with about 10 million square feet of commercial space, is replacing the former Naval Air Station South Weymouth, which ran as an airfield from 1942 to 1997. The site lies in Weymouth, Rockland and Abington. The Coast Guard keeps a buoy maintenance facility there. No active flying units were listed after closure. We do not assume anything about a building from its past. Each roof gets its own inspection.
The same goes for any older aviation building. Age tells us little about the roof. A hangar may have been re-roofed more than once, and it may still have the original deck under a patchwork. Core cuts and a moisture survey tell the real story. Where a metal roof retrofit makes sense, we confirm the purlins and structure first.
Owners near Weymouth, Rockland or Abington can use the same inspection format at each building. On a federal or base site, access and escort rules add steps, and the gate, badge and escort steps of military installation roofing set the schedule.
Price the Delay and Write the Scope
Hangar roof damage can cost more than the roof. Water on aircraft, tooling or avionics leads to repairs, downtime and insurance questions. A small flashing repair costs a small amount. The same flashing left for two winters can cost a lot.
We write the scope in zones. Each zone has a repair list, a cost range and a schedule. Work moves along the roof so only part of the hangar is exposed at a time, and each zone is dried in before the crew leaves, with tarps pinned for wind. A larger scope can bring permit and energy review under the state's current code, the 10th edition that took effect on October 11, 2024. We confirm that before dates are set, and the permit date goes on the schedule next to the dry-in date. Related building types such as a warehouse or a flex industrial building follow the same logic.
Commercial Roofing Questions
Where do hangar roofs usually leak first?
At door headers, wall joints, panel laps and penetrations. The membrane or metal field is usually fine. The details fail first, so the walk starts at the doors and corners and moves inward to the field.
Can you roof over parked aircraft?
Only with an owner-approved cover and movement plan. We work in zones and protect or move aircraft as the owner decides.
How do you avoid fuel and fire risk?
No open flame near fuel areas. We use cold-applied systems and mechanical fastening. If heat is needed, the owner's hot work permit and fire watch apply.
Does snow load matter for a hangar roof?
Yes. A long clear span carries drifts and ponded meltwater. We check drains, deflection and low spots and flag anything for an engineer.
What starts a hangar review?
An address and a photo of the worst spot, inside or out. We pin down the failure before anyone asks for a replacement quote.