ASTM C1902-22a PDF

Overview

ASTM C1902-22a: Standard Specification for Cellular Glass Insulation Used in Building and Roof Applications establishes requirements for rigid cellular glass thermal insulation blocks intended for use in building exteriors and interiors. This standard specifies the physical and performance properties of cellular glass insulation blocks such as thermal resistance, compressive strength, water absorption, and fire performance, making it a key reference for manufacturers, suppliers, engineers, and construction professionals working with insulation solutions.

Cellular glass insulation covered by ASTM C1902-22a is suitable for applications in walls, foundations, floors, ceilings, and roofing, and is designed for continuous use at temperatures ranging from 200°F to −50°F (93.3°C to −45.6°C). Products are subject to building codes and may require fire performance verification according to established test methods.

Key Topics

• Material Composition: Rigid, noncombustible cellular glass formed by foaming and setting under molten conditions, resulting in hermetically sealed cells.
• Physical Properties: Includes density, thermal resistance, compressive strength, flexural strength, water absorption, vapor permeability, dimensional stability, and corrosion resistance. Each property is tested according to referenced ASTM test methods.
• Product Classification: Five types (I-V), each with specified minimum values for thermal resistance and compressive strength, catering to differing insulation needs and load requirements.
• Dimensional Standards: Standard blocks are typically 24–36 inches in length, 18–24 inches in width, and 1.5–8 inches in thickness, with precise tolerances to ensure reliable performance.
• Fire and Safety Considerations: Surface burning and combustibility characteristics are addressed, supporting compliance with fire safety regulations and building codes.

Applications

Cellular glass insulation specified by ASTM C1902-22a is widely used across various building and roofing applications due to its durability, low water absorption, noncombustibility, and stable thermal properties:

• Building Envelopes: Used in exterior and interior walls to provide energy-efficient thermal insulation and moisture resistance.
• Foundation and Under-Slab: Protects foundations and floors from temperature fluctuations, moisture intrusion, and helps prevent heat loss.
• Roofs: Commonly applied as roof insulation due to its compressive strength, fire resistance, and dimensional stability in varying conditions.
• Specialized Structures: Suitable for use in environments with temperature extremes or strict fire safety requirements, such as industrial facilities, cold storage, or green buildings.
• Continuous Insulation Systems: Often integrated into systems where uninterrupted insulation layers are required to meet high-performance energy codes.

Related Standards

ASTM C1902-22a references several other essential standards to ensure accurate measurement and quality consistency:

• ASTM C165: Test Method for Measuring Compressive Properties of Thermal Insulations
• ASTM C168: Terminology Relating to Thermal Insulation
• ASTM C177 / C518: Test Methods for Thermal Transmission Properties
• ASTM C203 / C240: Test Methods for Breaking Load, Flexural Properties, and Cellular Glass Block Testing
• ASTM C303: Test Method for Dimensions and Density of Preformed Insulation
• ASTM C390: Practice for Sampling and Acceptance of Thermal Insulation Lots
• ASTM E84: Test Method for Surface Burning Characteristics of Building Materials
• ASTM E96/E96M: Water Vapor Transmission Rate Test Methods
• ASTM E136: Combustibility Assessment in a Vertical Tube Furnace

Practical Value

Compliance with ASTM C1902-22a ensures that cellular glass insulation blocks used in building and roofing applications meet stringent quality, safety, and performance criteria. By adhering to this standard, stakeholders can:

• Specify products with predictable thermal performance and structural reliability
• Meet requirements for noncombustible, moisture-resistant insulation
• Streamline procurement and project approvals by referencing standardized test methods and classifications
• Address regulatory and building code mandates for fire and safety performance

Implementing products certified to ASTM C1902-22a supports sustainability, building integrity, and occupant safety in construction projects worldwide.