China, August 08, 2025 – United Insulation, one of the world's biggest exporters of building insulation materials, today announced its recent successful export of a batch of high-end glass wool products into the US market. Products are strictly in accordance with the requirements of the R-value defined by US International Energy Conservation Code (IECC) and ASHRAE 90.1 standards, in various specifications, including but not limited to R-13 up to R-30. In addition, this production is designed for residential walls, ceilings, and floors, as well as for application in commercial buildings. The export marked a new milestone for United Insulation in its deep cultivation within the US market. As one of its core markets, American customers would continue to enjoy customized packing, brand service, and a full-range of international certifications.

What is the R value standard in the United States? Why is it a core threshold for glass wool to enter the North American market?

 

According to DOE and FTC, R-value or thermal resistance is defined as a thermal performance indicator of insulation material, which is usually expressed in h·ft²·°F/Btu. The greater the R-value, the better the insulation material will be. In general, IECC 2018 version and its update in 2021 set the minimum glass wool R-values under different climate zones of the United States:

 

- Wall insulation: Zones 1-3 are R-13 to R-15; zones 4-8 are R-20 to R-21: Florida R-13, California R-19, New York R-20

 

- Ceilings/Attics: Minimum R-38 to R-60, ensuring insulation in winter and heat resistance in summer;

 

- Floors/Basements: R-10 to R-30, with the overall U-value calculated accounting for thermal bridging effects.

 

These specifications present the thermal conductivity test by hot box method to meet the ASTM C518 standards that, within a glass wool density of 10-64 kg/m³, the R value remains constant at 3.0-4.3/inch.

 

Market Significance of R-Value Compliance: Opening the Door to the One Trillion-Dollar Construction Market in the US with 330 Million People

 

- Code Requirements: Building codes in all 50 states and Washington, D.C. directly reference the IECC. Over 95% of new/renovated residential projects must utilize R-value compliant materials or they will fail energy audits and fail to receive ENERGY STAR subsidies.

 

- High-class demand in North America: The US alone consumes more than 200 million cubic meters of glass wool annually; key applications are in passive house, LEED Gold-level building, and data centers in California, Texas, and Florida. Products with insufficient R-values will be rejected and returned to the factory.

 

- Global Expansion: Some projects in Canada and Mexico have a reciprocal recognition of IECC standards, continuing the NAFTA/USMCA trade chain.

 

- Economic Incentives: High-R-value glass wool can help reduce building energy consumption from 20-30%, while earning up to 30% in federal tax credits for the investment ITC and decreasing insurance premiums.

 

United Insulation: Ensuring the Quality and Reliability of High R-Value Glass Wool

1. Accurately Guaranteed R-Value: UL 723 (ASTM E84) certified, less than 5% deviation in R-value, uniform density assures long-term non-settling;
2. Top-quality fire resistance and environmental friendliness: Class A flame spread index ≤ 25, smoke density ≤ 450, GREENGUARD Gold low VOC certification; it can be applied at sensitive locations including schools and hospitals.
3. Leading Customization Services: Provide US customers with ODM branded packaging, including English lettering and logo, support small batches of customization of R-19/R-21 specifications, shorten delivery by 20%;
4. 50-Year Durability and Stability: Water-resistant and mildew-resistant

 

 "The United States is the core market for our insulation exports," said the North American Director of United Insulation. "The successful delivery of this batch of high R-value glass wool not only validates our commitment to IECC." A deep understanding of the standards further indicates the company's commitment to providing reliable solutions for American clients. From zero-energy houses in Los Angeles to commercial complexes in Chicago, we will go on to deliver high-performance glass wool, contributing to the sustainable transformation of North American buildings.

 

About United Insulation:

United Insulation is a leading Chinese brand in the export of high-end glass wool and rock wool. Its major products are sold to more than 160 countries and regions, including the United States, Canada and Australia. It has acquired top-grade global certifications such as UL, FM Approvals, CE, GREENGUARD Gold, and ISO 9001/14001/45001, focusing on energy-saving, fire-resistance, and safety in the supply of insulation solutions for the North American market.

 

Website: www.unitedinsulation.com

Email: info@unitedinsulation.cn