Like everything else over time, co-op maintenances and condo common charges will increase. Regular occurrences that impact maintenances and common charges are increases in staff salaries; fuel, electricity, and water increases; increased real estate taxes; and a co-op taking a second mortgage on the building. In addition, special expenses might be incurred if the roof needs repair or the boiler needs replacing, or a pipe burst and caused extensive flooding. The costs to address such problems will affect maintenances if there is not enough money in the Reserve Fund to pay for repairs. When a prospective purchaser decides to buy a co-op, the buyer's attorney visits the managing agent and examines the Minutes to the Meetings of the Board, and other internal documents, to estimate whether one of these big expenses might be coming up in the near future; to determine the soundness of the building's finances; and to check whether the Reserve Fund is adequate. The buyer's attorney can then advise his client that a maintenance increase is likely to occur soon, or on the otherhand, maintenances are likely to stay stable for a while.