ICC-ES AC48

Full Name

ICC-ES AC48 – Acceptance Criteria for Self-adhered Roof Underlayments for Use as Ice Barriers

Scope

ICC-ES AC48 outlines the requirements for self-adhering roof underlayment materials intended to protect against water intrusion caused by ice dams. The scope includes:
  • Material properties: it specifies the minimum requirements for self-adhered roof underlayments, including their ability to resist water penetration, withstand low temperatures, and maintain adhesion to the roof deck.
  • Testing procedures: it details the standardized testing methods for evaluating the water resistance, low-temperature flexibility, and adhesion properties of self-adhered roof underlayments.
  • Installation requirements: it provides guidelines for the proper installation of self-adhered roof underlayments to ensure their effectiveness as ice barriers.
  • Evaluation and certification: it outlines the process for evaluating and certifying self-adhered roof underlayment products to ensure they meet the acceptance criteria.
ICC-ES AC48 is essential for manufacturers to demonstrate that their self-adhered roof underlayment products meet the necessary performance and safety standards for use as ice barriers. It also provides valuable information to building officials, designers, and contractors to select and install appropriate ice barrier products for roofs in cold climates.

Resources

Keywords

self-adhered roof underlayment; ice barrier; acceptance criteria; water resistance; low-temperature flexibility; adhesion; testing; installation; evaluation; certification
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