Aircraft Hangar
NATO Air force, UK
The treatment was done in 1981. The picture was taken during the application work.
The problem
The hangar is a concrete construction with a mold cast of steel on the underside of the roof. During the cold season these constructions are exposed to condensation. The cold accumulated in the concrete makes the underside of the roof much colder than the indoor air. The problem increases when the aircrafts are brought in, due to the heat and steam from the engine. The hot humid air raises and creates a microclimate under the roof with a RH near 100%.
This is not only a question of comfort to the pilots and mechanics serving the aircraft. Water drips falling down can contain small fragments of concrete that can harm the aircraft during flight. The hangar also contains electronic equipment that can be damaged.
Besides the steel sheets in the roof had started to rust.
The solution
The roof was cleaned from rust and grease.
The corroded areas were wire brushed and painted with a rust primer.
Finally a coat of 40 mills KEFA Airless was sprayed on.
The result
The condensation problems stopped. The mechanics serving the aircraft are of the opinion that the indoor climate feels dryer and warmer. Since no reading of the temperature and RH were allowed after the treatment, there is no means to verify these statements. However, this observation is common after a KEFA treatment and can probably be explained by the fact that the RH normally sinks after the treatment. Dry, cold air feels warmer than humid, cold air.
