House wrap is a weather-resistive barrier installed over wall sheathing and behind siding. It helps manage water and air that can get past the exterior cladding.
Why It Matters
Siding is the first line of defense, but it is not the only line. A properly installed weather barrier helps protect the wall assembly when wind-driven rain or incidental water gets behind siding.
Common Problems
Problems include torn wrap, backward laps, missing tape, poor window and door flashing, gaps around penetrations, and siding installed over damaged or incomplete wall protection.
Building Codes & Industry Standards
Building codes generally require a weather-resistive barrier behind many wall cladding systems. Manufacturer instructions also explain how overlaps, fasteners, and flashing transitions should be handled.
Exterior Echelon Notes
Exterior Echelon treats house wrap as part of the siding system, especially around windows, doors, trim, and roof-to-wall transitions.
