Termites and insect damage, bird or rodent damage, rust, rot, mold, and general wear and tear are not covered. Damage caused by smog or smoke from industrial or agricultural operations is also not covered. If something is poorly made or has a hidden defect, this is generally excluded and won't be covered.
Which area is not covered by most homeowners insurance?
Most homeowner policies provide coverage that does not apply to animals, birds, fish, automobiles and business property; for loss or damage caused by flood, surface water, water which backs up through sewers or drains, earth movement, nuclear damage, war, etc.