A water-resistive barrier, or WRB, is a layer behind siding that helps protect the wall from water that gets past the exterior cladding.
Why It Matters
Siding is not the only water-control layer. A properly integrated WRB helps direct incidental moisture back out of the wall assembly.
Common Problems
Common issues include torn wrap, reverse-lapped seams, missing flashing integration, open penetrations, and relying on siding alone for water protection.
Building Codes & Industry Standards
Exterior wall assemblies commonly require a water-resistive barrier installed according to code, cladding requirements, and manufacturer instructions.
Exterior Echelon Notes
Exterior Echelon looks at siding, flashing, trim, and weather barriers as one exterior system rather than separate pieces.
