ICC-ES AC527
Full Name
ICC-ES AC527 – Acceptance Criteria for Self-adhered, Thermoplastic, Below-grade, Dampproofing and Waterproofing Sheet Membranes
Scope
ICC-ES AC527 outlines the acceptance criteria for evaluating self-adhered, thermoplastic, below-grade sheet membranes used for dampproofing and waterproofing purposes in building construction. These membranes are applied to the exterior surfaces of foundation walls and other below-grade structures to prevent moisture penetration and protect against water damage.
The evaluation process encompasses several key aspects, including:
- Material properties: assessment of the physical and chemical properties of the membrane material, such as thickness, tensile strength, elongation, tear resistance, puncture resistance, and resistance to UV exposure, weathering, and chemical attack.
- Performance testing: conducting tests to evaluate the membrane’s water resistance, water vapor transmission, and ability to withstand hydrostatic pressure under various conditions.
- Bonding performance: assessment of the self-adhering properties of the membrane, including its adhesion strength to various substrates like concrete, masonry, and wood.
- Compatibility: evaluating the compatibility of the membrane with other building materials and components, such as insulation, sealants, and primers.
- Installation procedures: review of the manufacturer’s recommended installation instructions to ensure proper application techniques and adherence to industry standards.
The acceptance criteria aim to ensure that the evaluated membranes meet minimum performance requirements for dampproofing and waterproofing applications, as outlined in relevant building codes and standards. By meeting these criteria, manufacturers can obtain an evaluation report from ICC-ES, which can be used to demonstrate code compliance and gain approval for use in construction projects.
Resources
Keywords
self-adhered; thermoplastic; below-grade; dampproofing; waterproofing; sheet membrane; tensile strength; elongation; tear resistance; puncture resistance; hydrostatic pressure; water vapor transmission; adhesion; compatibility