ICC-ES AC148
Full Name
ICC-ES AC148 – Acceptance Criteria for Flexible Flashing Materials-for use with the 2021, 2018, 2015, 2012 and 2009 I-Codes
Scope
ICC-ES AC148 establishes the acceptance criteria for evaluating the performance of flexible flashing materials used in wall assemblies. The criteria ensure these materials meet the requirements of the International Building Code (IBC) and the International Residential Code (IRC).
Key aspects covered within the scope of AC148 include:
- Water resistance: assessment of the flashing material’s ability to prevent water penetration under various conditions, including wind-driven rain.
- Durability: evaluation of the material’s resistance to degradation from exposure to UV radiation, temperature extremes, and other environmental factors.
- Compatibility: assessment of the material’s compatibility with other building materials, such as sealants and adhesives.
- Ease of installation: consideration of the material’s ease of installation and its ability to conform to complex shapes and details.
Specific applications covered by AC148 include:
- Window and door flashing: evaluation of flexible flashing materials used around windows and doors to prevent water intrusion.
- Through-wall flashing: assessment of materials used to seal penetrations in walls, such as vents and pipes.
- Corner flashing: evaluation of materials used to protect vulnerable corners from water damage.
Resources
Keywords
flexible flashing material; water resistance; durability; compatibility; ease of installation; window flashing; door flashing; through-wall flashing; corner flashing; international building code (IBC); international residential code (IRC)