Vapor Barrier Paint For Attic

The reason as you may have read is that when there is a vapour barrier in homes in hot humid climates that rely on air conditioning for human comfort that vapour barrier.

Vapor barrier paint for attic.

Moisture vapor barrier primer finish interior latex is a coating designed to reduce the loss of moisture through walls and ceilings. I install my vapor barrier in the middle of the wall system between the two walls. 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. Resolution of the vapor barrier debate.

Over time this trapped moisture can rot the wood framing in your attic or cause mold and mildew to appear. Such a location works both as a vapor barrier as well as an air barrier and eliminates the need for an external air barrier not a easy application on a multi storried building as well as any special electrical pans and their sealing. Vapour barrier paint or vapor barrier paint in the u s. Some debate still occurs over how necessary vapor barriers are but a consensus is growing closer.

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. Benjamin moore has a super spec primer k206 00 that is a latex paint and comes in at less than 0 5 perms. Most authorities now agree that vapor barriers are important under certain conditions but not necessarily as a whole house solution for every home. Sherwin williams has a moisture vapor barrier latex paint b72w00001 that comes in at less than 1 perm.

Climates vapor barriers or more accurately vapor diffusion retarders should be part of a moisture control strategy for a home. A plastic vapor barrier is best installed in a vented attic within climates with over 8 000 heating degree days. A vapor barrier or vapor diffusion retarder is a material that reduces the rate at which water vapor can move through a material. In circumstances where conditions inside a home or office are much different than outdoor conditions water.

The insulation fiberglass or cellulose is then placed on top of the drywall with no vapor barrier above or below. Attic vapor barrier detail for cold climates the best approach for a vented attic in a cold climate is installing a layer of drywall with a good coat of latex paint the paint creates a semi permeable vapor barrier. Adding a second vapor barrier could cause condensation to become trapped in the insulation between the two vapor barriers. Is more of a solution for walls rather than ceilings to prevent the indoor vapour drive during hot humid weather.