But sometimes nature throws and extra spanner in the works.
We have to spray all the timbers regularly with insecticide to keep burrowing bugs at bay.
And now at school we encountered an extra problem when bats decided to move in and roost in the roof above class six.The fruit bats have now been encouraged to go elsewhere and our "Mr Makuti", the roofer, has put in nets to act as a deterrent and to make sure they don't return!