Preventing mould outbreaks

In general, moisture (above 65% RH), darkness, and poor air circulation are ideal conditions. Warmth is a factor, but certain moulds and bacteria will thrive in cold temperatures too (think of what can happen in a refrigerator).

• Check new collections or shipments for the presence of mould.
• Maintain moderate temperature and relative humidity (below 20 °C / 68 °F and 65% RH).
• Monitor the environment
• Circulate air.
• Air room if possible.
• Vacuum clean regularly.
• Do not shelve books directly against an outside wall. Owing to temperature and humidity differences between inside and outside environments, moisture may develop along walls. Allowing air to circulate against the walls will enable the moisture to evaporate.
• Regularly check material in glass fronted book cases – checking the fore-edges of the volumes
• Keep material directly off floors.
• Separate stacks, boxes, books etc., to allow circulation of air.
• Do not allow plants into storage areas.
• Waterproof basements and walls below ground level.
• Place or adjust outside gutters and drains so that water does not collect near the outside walls. Check gutters and drains regularly to avoid obstructions.
• Place lawn sprinkler systems so that they do not soak outside walls.
• Regularly inspect collections for mould so that any infestation is detected before it becomes serious.