How to Stop Frost in an Attic

Attics are usually insulated on the floor to keep cool or hot air from seeping into the inhabited rooms below. The rest of the attic space along the rafters is not always insulated. If you live in an area that has extreme changes in temperature, the lack of insulation on the rafters can cause moisture to develop from warm air rising and then condensing. During cold weather, the moisture turns to frost. To alleviate the issue, install insulation.

Batting insulation
Utility knife

Instructions

- 1
  Roll out insulation over the top of the (attic floor) insulation that fits in between the floor joists. Place the batting insulation perpendicular to the joists so that it has support and doesn't press down the lower insulation.
- 2
  Cut the insulation with a utility knife to fit in any small spaces or along the wall. Adding an extra layer of insulation at a perpendicular angle covers any holes and blocks warm air that tries to make its way up.
- 3
  Shake loose insulation from bags into hard-to-reach areas or small crevices along the edge of the floor and rafters. The loose insulation fills in the holes.
- 4
  Wrap insulation around pipes that give off heat or cold. Use duct tape to secure vapor barrier insulation around the pipes.
- 5
  Spray expanding foam insulation in gaps around vents in the ceiling of the floor below the attic, as well as around pipes.

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