1.   And to get a cold roof, insulate the attic floor and ventilate the attic.

2.   And that is done by insulating the attic floor and ventilating the attic.

3.   Another cardinal rule in laying insulation on an attic floor is to avoid putting insulation in the soffits, which are where the roof overhangs the wall.

4.   Another popular fan is the whole house fan, a monster machine installed in the attic floor.

5.   Another way to insulate the attic floor is to have insulation blown in, or blow it in yourself with a rented blower.

6.   As an alternative, Raimondo said, an attic floor can also be insulated with cellulose.

7.   Blowing is usually done in walls, sometimes in attic floors.

8.   A common site for leaks in a house, Keefe said, is the attic floor.

9.   A. You could add insulation to the attic floor, but without a vapor barrier it will not be terribly effective.

10.   A. If that gap reveals sort of a bottomless pit, you can fill it with pouring fiberglass, the type used for blowing on an attic floor.