71.   Usually located in the attic floor, it exhausts air from the house into the attic where it is vented through vents.

72.   Ventilation is necessary, but the attic floor must be insulated so the ventilation does not pull warm air out of the house in winter.

73.   Weather stripping lines the bottom edges, and Velcro straps pull the boxes tight to the attic floor.

74.   With the door closed, you may notice that the stair itself extends above the attic floor.

75.   You are not supposed to cover exposed wires in the attic floor, but it is done in thousands of houses throughout the country without serious ill effects.

76.   You can increase the R-value of the insulation in the attic floor by adding another layer of fiberglass batts on top of the existing layer.

77.   You probably already know that, but you can check the attic floor, the basement ceiling, and the walls.

78.   Members of a large family which lived in the attic floor of the four-storey building were still missing.

79.   The building burned for several hours, and members of a large family which lived in the top attic floor were still unaccounted for.