A weather-resistant barrier (WRB) is an important part of today’s energy-efficient and healthy homes and commercial buildings. A modern WRB design shields the walls of a structure from water and air infiltration, along with moisture accumulation within the wall systems.
The need for WRB emerged during the end of the late 20th century when growing environmental concerns and rising fuel costs prompted the need for more energy-efficient structures with tight building envelopes. Initial designs of WRB were airtight but not permeable; therefore, moisture became trapped in the walls, which led to mold and rot. Consequently, it became clear that WRBs needed to be vapor permeable. Vapor-permeable WRBs would let water escape from the wall system and protect a building or home from damage and deterioration.
Modern, high-quality weather-resistant barriers are both air- and moisture-resistant and permeable to vapor, which ensures a home or commercial building is energy-efficient, healthy and comfortable.
Weather-resistant barriers are the second line of defense against moisture entering a building or home. The wall cladding is the first line of defense. The American Architectural Manufacturers Association (AAMA) defines a weather-resistant barrier as a surface or a wall responsible for preventing air and water infiltration to the building’s interior. Weather-resistant barriers should not be confused with water-resistant barriers. Water-resistant barriers provide only a continuous water-resistant barrier behind the exterior wall veneer. There are several categories of weather-resistant barriers including asphalt-felt, Grade D building paper, and plastic house wrap.
A high-quality weather-resistant barrier should be air- and moisture-resistant, permeable, with high tear strength and UV-resistant. It should also be simple to install. Importantly, a weather-resistant barrier must meet the 2018 International Building Codes (IBC 1402.2) requirements for water-resistance, along with vapor permeability and the 2018 International Residential Code for water resistance (IRC R703.1.1)2.
Barricade® Building Wrap is a high performing weather-resistant barrier that meets and exceeds the requirements of the IBC 1402.2 and IRC R703.1.1. It is air- and moisture-resistant, permeable, UV-resistant, and has high tear strength. It is also easy to install.
The high levels of air resistance of the Barricade Building Wraps are in accordance with IRC Section N1102.4.1 and IECC Section 402.4 and 502.4.
Barricade Building Wraps pass all the tests used to measure a house wrap’s water resistance: ASTM D779 (boat test), CCMC 07102 (pond test), and AATCC Test Method 127.
The five Barricade Building Wraps are permeable to vapor. The ASTM E96 standard requires house wrap with five perms or greater. The higher the number, the more permeable the material.
The maximum time a house wrap can endure exposure from the sun before becoming damaged is an important element of a house wrap.
A WRB with high resistance to tearing is essential to the successful installation of a weather-resistant barrier.
Barricade Building Wraps are high-performing, effective weather-resistant wraps. Weather-resistant wraps are important for creating energy-efficient, durable, and healthy commercial buildings and homes. Please visit Barricade for more information on the importance of weather-resistant barriers.
1The IBC 1402.2 states that exterior walls shall provide the building with a weather-resistant exterior wall envelope, including a manner to stop water from accumulating within the wall assembly by providing a water-resistive barrier behind the exterior veneer.
2The 2018 IRC R703.1.1 requires that the exterior wall envelope shall be designed and constructed in a manner that prevents the accumulation of water within the wall assembly by providing a water-resistant barrier behind the exterior veneer as required by Section R703.2 and a means of draining to the exterior water that enters the assembly.