National Gypsum announced its PermaBase brand Cement Board and PermaBase Flex Cement Board products have achieved Greenguard Children & Schools Certification.

The products, which are identified for use as cement backer board with ceramic tile, as well as in certain exterior applications, join an expanding list of National Gypsum products to have achieved one of the world’s most stringent indoor air quality standards.

“The PermaBase Cement Board certification is the latest demonstration of our ongoing commitment to sustainable building practices and indoor environmental quality,” said David Drummond, general manager, cement board.

The Greenguard Certification Program is an industry independent, third-party program that has been certifying products for low chemical emissions since 2001. To achieve the certification, the company’s products met the most stringent emissions limits available, which take into account the added sensitivity of children and adults with compromised immune systems.