Vapor Barrier Attic Floor

I want to install insulation in my attic floor which i use for storage.

Vapor barrier attic floor.

Resolution of the vapor barrier debate. On the other hand an air barrier a properly detailed air tight drywall ceiling for example in the absence of a vapor barrier can be effective since it stops the flow of vapor laden air. Vapor barriers keep the air moisture in your house from condensing in the insulated cavities. This barrier is meant to keep moisture from getting to the insulation in the walls and ceilings and it is required by building codes when insulating most houses.

A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter. In any case the vapor barrier must point to the warm side. Some regions don t require a vapor barrier. In circumstances where conditions inside a home or office are much different than outdoor conditions water.

To know if you need a vapor retarder ask yourself a few basic questions. Some debate still occurs over how necessary vapor barriers are but a consensus is growing closer. Because it s nearly impossible to seal penetrations in the ceiling the reality is water vapor will get into the attic. Most forms of attic insulation benefit from the addition of a vapor barrier to protect them from the harmful effects of moisture which can reduce their effectiveness over time the following are a few simple steps to help you undertake the task properly so your vapor barrier retains heat without damaging the insulation.

Most authorities now agree that vapor barriers are important under certain conditions but not necessarily as a whole house solution for every home. Attic vapor barrier detail for cold climates. Whether your vapor barrier is a facing or a film it must be placed on the warm in winter side of the wall. Even though we apply vapor barriers to exterior insulated walls in cold climates it s no longer recommended for ceilings floor of the attic.

The previous owner has 1 foam insulation with a a plastic vapor barrier only on the rafters of the roof about4 from the slate roof but not on the walls of the attic. My question is should iuse a vapor barrier inthe attic floor. If you live in a cold climate place the vapor barrier between the interior of your home and the insulation. A vapor barrier in an attic assembly in a severely cold climate with the absence of an air barrier will likely be ineffective.