Lean-To Shops and Office Wings Beside the Bay
A maintenance facility is more than a hangar bay. Shops, parts rooms, offices and break areas often hang off the sides of the main structure, each with its own roof height, slope and drainage. Where a low lean-to meets the tall bay wall, water running down the high roof lands on the low one and wears a patch of membrane that was never meant to see that flow. A scupper box and downspout placed at that valley, with a walk pad beneath, solves the problem.
We install and repair the systems that suit each part. Standing seam metal is a common choice on hangar bays, where long panels and few penetrations work well, while single-ply membranes suit the flatter shop wings. If an older metal bay has lost its coating but still has sound structure, a metal roof retrofit may extend its life without a tear-off. Each choice is checked against the specification and the loads the building carries.
Working Over Aircraft and Near Fuel
Work over a hangar floor is different from work over a warehouse. An aircraft in the bay needs protection from falling debris, dust and fasteners, and tools and loose material left on the roof can become a hazard to flight operations. We cover aircraft or schedule work for times when the bay is clear, collect debris at the end of every shift and keep a count of tools and hardware that go up and come down. Interior protection is hung before tear-off, not after the first mess.
Fuel changes the plan again. Los Alamitos has a 200,000-gallon fuel farm on its airfield, and areas near fuel limit open flame and hot work. That steers a reroof toward heat-welded or mechanically attached systems and cold-applied details. Heat is a concern too. With a June record of 113 F in Pasadena, a dark membrane over an aircraft bay pushes interior temperatures higher still. A reflective surface and good ventilation help the building and the people who work in it.
Flight Line Access and Operating Windows
A flight line has its own rules. Drivers follow marked routes, vehicles carry the markings the airfield requires, and crews may be escorted across ramps and taxi areas. The airfield at Los Alamitos has two runways, one of 8,001 feet and one of 5,902 feet, and the movement of aircraft across that airfield is what a roofing schedule has to fit. We ask for the airfield driving rules, the escort procedure and the hours of aircraft movement before we build a schedule, since each one limits where a hoist can stand and when a truck can arrive.
That information turns into phases. Sections of roof are opened only as large as a crew can close the same day, and we hold temporary dry-in material on site for a recall or a weather change. When a crane has to lift material over a ramp, the lift is planned with the base. A hangar roof is no place for improvisation, and the planning takes more time than the roofing.
Surveying Large Roofs Without Walking Every Foot
A base like Joint Forces Training Base Los Alamitos, with more than 160 buildings and roughly 1.5 million square feet of building space, cannot have every roof walked every year. Drone roof inspection covers a big hangar quickly and shows edge damage, ponding and failed seams without anyone stepping onto a slippery panel, where the installation allows drones. An infrared moisture survey adds the view into the insulation. Together they give a facilities office a ranked list of roofs, which turns a budget argument into a plan.
Civil airfields raise the same large-roof questions. A civil owner with aircraft hangar roofing needs in Burbank, home to Hollywood Burbank Airport, faces the same wide spans and door walls as a base does, along with operating windows set by the airfield. Depot and storage buildings bring long edges of their own, and military warehouse and depot roofing is checked with the same drone and infrared methods.
Commercial Roofing Questions
Why do hangar roofs lose edge metal in wind?
Open doors let wind into the building, and the roof is lifted from both sides at once. Edge metal and corners feel it first. We rebuild the edge on a tighter fastener pattern and check it again after any strong wind.
Can a hangar roof be repaired with aircraft inside?
Sometimes, with protection and a clear plan. Aircraft are covered or moved, debris control is strict and tools are counted at the end of every shift. If the bay can be cleared for a short window, we use it for the invasive work.
Which roof system is common on aircraft bays?
Standing seam metal is widely used on long hangar bays, with single-ply or modified bitumen on the flatter wings. The specification and the building's structure narrow the options. We review both before recommending a system.
How are roofs near fuel storage handled?
Open flame and hot work are generally limited. We use welded sheets, mechanical attachment and cold-applied products, and we confirm the rules building by building. A change in the plan is far cheaper before the material arrives.
Do drones really help on a hangar roof?
They help a great deal on a large, hard-to-walk roof. A flight finds edge damage, ponding and seam failures, and the images go into the written record. Where drones are not allowed, we walk the roof with a safety plan.
