Make the building inhospitable from the outside

The building itself can be made inhospitable to insects. The following sensible precautions can be taken to reduce and control insect populations:
• Do not plant shrubs or trees close to a building, and avoid flowering species.
• Remove vines, ivy, and other climbing plants from the walls or roof.
• Use a wide gravel or paving surround to the building, ensuring that there are adequate and effective drains to prevent water from entering the structure.
• Do not attach lights to buildings, as they will attract flying insects. Insects tend to be attracted by ultraviolet, so lights close to a building should have low ultraviolet output. Lights mounted away from the building should be the mercury-vapor type with a high ultraviolet output.
• All garbage and rubbish, including garden and library waste, should be kept in a vermin-proof container away from the building.
• Ensure that all roof drains and downspouts are kept clear of debris and in good condition.
• Bird and other animal nests should be removed from the building.
• Seal all unnecessary holes in the building, and seal and caulk around holes for electrical cables, water pipes, telephone connections, and waste pipes.
• Doors and windows should be tight fitting and kept closed at all times, and insect screening of an appropriate small mesh size should cover every opening.
• When designing a new building, consider the installation of a revolving door.

Next: And from the inside