Vapor Barriers Vapor Barrier Attic

A vapor barrier or vapor diffusion retarder is a material that reduces the rate at which water vapor can move through a material.

Vapor barriers vapor barrier attic.

The goal of vapor barrier strategies is to prevent moisture from collecting and corrupting building materials. Because it s nearly impossible to seal penetrations in the ceiling the reality is water vapor will get into the attic. The basics of air sealing are covered in this article. Lucy no you don t need a vapor barrier.

Remove any transferable items from the attic so that they do not get in the way as you work. Attic vapor barrier detail for cold climates even though we apply vapor barriers to exterior insulated walls in cold climates it s no longer recommended for ceilings floor of the attic. Attic insulation should always be installed with the paper backing facing toward the living space the ceiling in this case. Improperly installed a vapor barrier may actually trap moisture inside a wall while a wall that is more porous can breathe effectively and be less susceptible to long term moisture problems.

If there is limited lighting find a way to provide more so you can see what you re doing. Air sealing an attic. Adding a second vapor barrier could cause condensation to become trapped in the insulation between the two vapor barriers. Begin the process of fitting a vapor barrier for attic insulation by preparing the space for the job.

Climates vapor barriers or more accurately vapor diffusion retarders should be part of a moisture control strategy for a home. What you need is an air barrier that is at every step of the way you have to pay attention to airtightness. If your climate does not meet these conditions a vapor retarder like latex ceiling paint will work well for your house if you are in all other climates except the hot dry and hot humid.