In winter when humidity is low it continues.
Air vapor barrier box.
Roll with dimensions of 39 x 100.
It lets wall cavities dry out to help prevent mold.
The ceiling box comes with an adjustable hanger bar for ease.
The lessco air vapor barrier box eliminates air leakage through electrical boxes prevents moisture damage in walls and ceilings improves energy efficiency.
The vapor barrier box is designed to meet the energy efficiency requirements of modern homes.
Low voltage wiring application.
Lessco low energy systems supply company inc.
They feature a foam gasket that provides a vapor tight seal preventing the free flow of air through the box.
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The lessco air vapor barrier box was developed in 1985 by stephen lentz an airtight homebuilder at that time.
The product has been on the market and used throughout the united states including alaska since 1985.
The factory controlled thickness of the membrane ensures uniform barrier properties and the woven polypropylene film increases strength and has a non skid surface suitable for the bonding of subsequent layers.
It was invented for use in energy efficient airtight housing.
Air leaks can occur around electrical boxes in exterior walls and ceilings sometimes carrying water vapor that can condense in the wall and attic cavity leading to rotting mold growth and an increased heating and air conditioning load.
F5 air vapor barrier is available in a 325 sq.
However cold air often finds its way through missed holes and cracks and an electrical box by itself offers no protection and unless ensure that it is has a vapor barrier you run the risk of it corroding and causing future electrical problems.
This helps control heating costs in the winter and cooling costs in the summer.
The lessco air vapor barrier box can be used in many different configurations.
But it can be used in outside walls and ceilings.
The job of both air barriers and vapor barriers is to prevent moisture from forming at that critical point they just do it in completely different ways.
For extra protection against moisture the membrain continuous air barrier and smart vapor retarder is your weapon of choice.