Part of the problem is that the mortar used to hold the bricks together is soft and loose. The termites can easily tunnel through this material and travel up the walls attacking any wood that they encounter.
Damage and shelter tubes will typically be found radiating outward from the perimeter walls. Tap on the joists and rafters to feel for weak areas and hollow spots. Look for shelter tubes built onto the surface of boards. Termite "dirt" will often times be visible in the cracks where two boards meet; for instance, where the joists and rafters are connected to the top plate. In cases of very heavy infestations, larger nests can be found protruding from the walls.Warning!! Attics can be very dangerous.
When viewed from above, an onlooker will see that the French Quarter contains a large and varied urban forest of trees. These trees are vulnerable to attack by the Formosan subterranean termite. Colonies located in trees can contain millions of individual termites that can also infest surrounding structures.
Above content by Chris Dunaway.
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