Weather Barriers
The terms “vapor barrier” and “air barrier” are used interchangeably, at their core they represent different solutions. “Air barriers are commonly confused with vapor barriers. If the purpose of the barrier is to prevent the transport of water vapor via the air, it is a vapor barrier. If the intent is to prevent the movement of air itself, then it is an air barrier (Walls & Ceilings).”
A weather barrier is a very important component of the building envelope since it protects the vulnerable building components from deterioration while allowing the structure to breathe.
A vapor barrier is used to prevent the transfer of water vapor from the outside environment into the building envelope where it causes it to produce moisture. “A vapor barrier prevents water vapor movement to protect buildings from the damage that can occur when moisture migrates in an uncontrolled manner into a structure (Walls & Ceilings).”
Air barriers are designed to prevent the flow of air and the moisture from entering the building envelope.
Components and systems include the following and can be:
Mechanically fastened
Building wraps
Adhesive membranes
Fluid applied materials
TAKE CHARGE TO AVOID STRUCTURAL DAMAGE, INCREASE PROTECTION, AND IMPROVE ENERGY EFFICIENCY IN YOUR CONSTRUCTION PROJECT BY INCORPORATING EFFECTIVE BARRIER SYSTEMS.
SO, WHAT MAKES AN EFFECTIVE AIR BARRIER?
1.Continuity: no gaps, cracks, or openings.
2.Durability: needs to last for the life of the building.
3.Repairable: access to repair if damaged.
Keene Building Products has developed two air/water weather barriers, DRIWALL™ AIR WEATHER BARRIER – High Build and DRIWALL™ AIR WEATHER BARRIER – High Perm., to be your solution. Keene’s air weather barriers are part of the assembly that continuously protects approved substrates from incidental water damage and improve energy efficiency. The seamless membrane also provides a drainage plane for incidental moisture.
FEATURES & BENEFITS:
Approved for use behind any wall cladding
Full surface coverage provides a seamless membrane
Used as air water barrier and flashing
Provides a drainage plane for incidental moisture
Does not rattle in the wind like sheet goods
Vapor permeable (Delete? with low air infiltration rate)
Components of the system are compatible
Adheres to most common building materials
Easy to apply, water-based for easy cleanup
Easily inspected
Fully Warranted System
Keene created a high-build air weather barrier and acrylic-based high-perm air weather barrier to best suit your building needs. Keene has been in the field and witnessed these issues first-hand and manufactured a product to be the perfect solution. Either as a stand-alone system under any wall cladding or in conjunction with the Driwall Rainscreen is a fully warranted system and peace of mind awaits you and your customer.
An air barrier can prevent structural damage, help keep the air quality clean and the mold out – leaving fewer problems for you and the building occupants.
Contact Keene for more information and to start using an air weather barrier in your system today.
Reference: https://www.wconline.com/articles/92704-vapor-air-barriers-whats-the-difference