Fairfax County schools have received $1.9 million in emergency funds from the county to repair seven of the system's worst leaking roofs.

But the Board of Supervisors, in awarding the money, also demanded at its regular meeting Monday that school administrators investigate why 62 of the system's 180 roofs are in such poor condition.

"A good commercial roof should last 20 years," Board Chairman John F. Herrity said in an interview yesterday. "I think we should see if we have any recourse against the contractors, and if not, I want to make sure we don't do business with them again."

Thomas F. Hanton, director of the school system's office of design and construction, said that of the 62 roofs in serious disrepair, only 10 are less than 20 years old. All but one of those 10, he said, are nearly 20 years old.

School administrators asked the Board of Supervisors for $4.5 million to repair or put a new coating on the first 21 of 62 roofs listed as cracking, blistering or leaking. For the past several years, the School Board has spent about $1.25 million of its budget on roof maintenance, but school officials said they need extra money to speed up the repair schedule.

The Board of Supervisors approved only $1.9 million of the $4.5 million request. The money will pay for new roofs at London Towne Elementary, Camelot Elementary, Cardinal Forest, Gunston Elementary, Mount Vernon High, as well as new roof coatings at Robinson Secondary and Chantilly High.