In 1981 NVLAP established the Carpet Testing Program for accrediting laboratories that test carpet and attached carpet cushion products. This program was developed in response to a request from the U.S. Department of Housing and Urban Development (HUD). Its purpose is to assist HUD in assessing the suitability of carpet and attached carpet cushion products for use in housing programs. HUD Use of Materials Bulletin No. 44 (UM 44), Building Products Standards and Certification Program for Carpet, includes the minimum requirements and standard test methods used for determining the acceptability of carpet and attached carpet cushion products for HUD housing.
In 1993 HUD issued Use of Materials Bulletin No. 72 (UM 72), Building Products Standards and Certification Program for Carpet Cushion, which includes minimum requirements and test methods for separate (not attached) carpet cushion products. In response to HUD’s issuance of UM 72, the NVLAP Carpet Testing program was expanded to include requirements for testing separate carpet cushions. The expanded NVLAP program was renamed the Carpet and Carpet Cushion (CCC) Program in 1994.
For information on the requirements of accreditation see NIST Handbook 150 which contains the general requirements for accreditation of laboratories. In addition, NIST Handbook 150-6 contains specific requirements for carpet and carpet cushion laboratories.
Proficiency Testing Requirements
Section 7.7.2 of ISO/IEC 17025:2017 requires a laboratory “monitor its performance by comparison with results of other laboratories, where available and appropriate.” NVLAP is not aware of any widely available interlaboratory comparison for carpet testing. Laboratories may choose to organize interlaboratory comparisons among themselves, but NVLAP does not require participation in interlaboratory comparison in the carpet program. If an appropriate interlaboratory comparison becomes available, NVLAP may require participation and will notify all laboratories of requirements.
- NIST Handbook 150:2016, NVLAP Procedures and General Requirements
- NIST Handbook 150-6:2006, NVLAP Carpet and Carpet Cushion
- NIST Handbook 150-6 Checklist (Word version)
- Test Method Review Summary (Excel)
References and Information
- HUD UM 44
- HUD UM 72
- ASTM Committee D13 on Textiles
- Carpet and Rug Institute
- American Association of Textile Chemists and Colorists