Testing Procedures

Chemical Emissions Test Methods

UL Environment uses advanced dynamic environmental chamber testing, as well as exposure modeling and analytical measurements, to test products and building materials for total volatile organic compounds (TVOC), individual VOCs, formaldehyde, ozone, and phthalates. There are defined allowable levels for key pollutants with known or suspected irritant or more serious health impacts.

The majority of chemical analyses are conducted with high-performance chromatography (HPLC) and gas chromatography/mass spectrometry (GC/MS). Some pollutants are measured with real time monitoring instruments. Certified products must undergo periodic re-testing and verification to remain certified.  

Microbial Resistance Test Methods

A pilot program in 2004 was developed to evaluate the potential for measuring mold resistant properties of materials used in building construction and manufactured for use in the built environment. The test procedure was developed following ASTM Standard D 6329 and evaluates building products, including paints and coatings, adhesives and sealants, wallboard, insulation, flooring, ceilings, window components and many other dry and wet materials for inclusion in the GREENGUARD Microbial Resistance Program. The test method was validated for its repeatability and applicability across a wide range of products. The advantage of this test method is a quantitative scale for ranking products for their resistance to environmental mold growth.