Vapor Barriers Vapor Barrier Attic

Because it s nearly impossible to seal penetrations in the ceiling the reality is water vapor will get into the attic.

Vapor barriers vapor barrier attic.

Climates vapor barriers or more accurately vapor diffusion retarders should be part of a moisture control strategy for a home. This acts as a barrier to keep heated moist air from rising up into the attic during cold weather. The basics of air sealing are covered in this article. A plastic vapor barrier is best installed in a vented attic within climates with over 8 000 heating degree days.

Air sealing an attic. If there is limited lighting find a way to provide more so you can see what you re doing. 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. Lucy no you don t need a vapor barrier.

Adding a second vapor barrier could cause condensation to become trapped in the insulation between the two vapor barriers. Attic insulation should always be installed with the paper backing facing toward the living space the ceiling in this case. Begin the process of fitting a vapor barrier for attic insulation by preparing the space for the job. Remove any transferable items from the attic so that they do not get in the way as you work.

Continue reading below our video of the day. 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. A vapor barrier or vapor diffusion retarder is a material that reduces the rate at which water vapor can move through a material.